Optimize topology canvas per the 2026-10-12 plan.

Save path: one atomic POST /views/{id}/commit (edges, ports, styles, node
add/remove, positions) replaces the multi-request save. Edge styles and
manual-edge port edits now go through dirty/undo/save instead of writing
immediately; non-manual edge ports are read-only.

Data safety: UI saves no longer clear MCP node locks or freeze the device
name into the placement label (label_override + omit-means-keep semantics,
also applied to the MCP positions tool). Adding NEs/neighbors with unsaved
edits now saves first instead of silently dropping them. Positions no longer
bypass membership caps, except persisting synthesized child-region icons.

Fixes found in acceptance: nodes added in the same commit kept (40,40)
under autoflush=False; edits on edges deleted in the same save 404'd the
whole save; box-selection drags and arrow-key moves were not marked dirty;
large canvases far from the origin opened blank and locate did nothing
because fitView waits for measurement that onlyRenderVisibleElements never
does (now fitBounds from known geometry).

Also: batch N+1 lookups in graph/positions, deterministic truncation,
outside-peer scan excludes internal edges, split TopologyPage into hooks,
fix flaky UME/LLDP port test, add scripts/topology_clear_frozen_labels.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/reviews/topology-optimization-plan-2026-10-12.md

@@ -0,0 +1,295 @@
+# 拓扑管理问题分析与优化计划
+
+日期：2026-10-12。范围：拓扑管理画布（`web/src/features/topology/*`）及其视图接口（`netx_api/topology_views_graph.py`、`topology_router.py`、`topology_fabric_links.py`）。不含：UME World 平铺大图 LOD、LLDP 采集策略、分类规则、MCP 布局算法。
+用途：交给 Cursor 按任务逐项实施；Claude 负责验收。
+
+本文结论来自代码阅读和本地脚本验证，没有在真实 PostgreSQL 或真实设备上执行。标了 **[已验证]** 的问题已经用脚本复现。
+
+**基线（修改前）：**
+- `pytest tests/test_topology.py tests/test_ume_topology_apply.py`：**69 项通过，4 项失败**（见 T13，修改前就失败，与本计划无关）
+- `web`：`npx tsc -b` 通过
+- 拓扑前端目前没有任何单元测试
+
+**实施进度（2026-10-12）：**
+| 任务 | 状态 |
+|---|---|
+| T11 基线失败测试 | ✅ 完成 |
+| T1 保存保留 lock | ✅ 完成 |
+| T2 不固化设备名为 label | ✅ 完成 |
+| T6 原子 commit + useTopologySave | ✅ 完成 |
+| T3 脏状态添加确认 | ✅ 完成 |
+| T4 手工边端口持久化 | ✅ 完成 |
+| T5 边样式走保存模型 | ✅ 完成 |
+| T7 N+1 / 截断确定性 | ✅ 完成 |
+| T8 positions 跳过缺失节点 | ✅ 完成（MCP 不依赖 positions 顺便加点） |
+| T9 点击不标脏 | ✅ 完成 |
+| T10 拆分 TopologyPage | ✅ 完成（`TopologyPage.tsx` ≤1200；抽出 palette/edge/keyboard/find/export/nodeOps/moduleLinks + `TopologyPageView`） |
+
+回归：`pytest` 87 passed；`npx tsc -b` 通过；`topologySaveDiff.test.mjs` 4 passed。
+
+---
+
+## 0. 结论摘要
+
+整体架构没有大问题（服务端图 + 本地编辑 + 一次保存）。主要问题集中在**“本地编辑状态”和“服务端状态”的同步边界**，有几处会静默丢数据或误删数据：
+
+1. **UI 保存会清掉 MCP 设置的节点锁定，并把设备名固化成标签。** **[已验证]** 保存后 `locked` 从 True 变为 False，节点被移走；之后设备改名，画布上仍显示旧名称。
+2. **有未保存修改时“添加网元/投影邻居”会静默丢弃这些修改，并留下隐形删除。** 被删除的连线会重新出现在画布上，但仍留在待删除队列里，下次保存时会被真正删掉。
+3. **修改已有连线的端口不会被保存。** 界面上可以改，也会显示新值，但不会标记为未保存，保存时也不会提交，刷新后就恢复原值。
+4. **连线样式绕过了“编辑→保存”模型。** 样式修改会立即写库，但撤销只回退本地。撤销之后，画布显示和数据库就不一致了。
+5. **保存不是原子的。** 一次保存会依次调用 N 次建边、1 次删边、1 次加点、1 次删点和 1 次写坐标，其中 3 次会返回完整的图数据。中途失败会留下“部分已保存”的状态。另外，同一套保存逻辑在 `purgePlaceholderById` 里重复实现了一遍。
+6. **后端有 N+1 查询和不确定的截断。** 写坐标时每个点各查一次；外部邻居查询的 `limit(5000)` 把视图内部的边也算进去了，边密集的视图可能找不到外部邻居；节点超过上限时截断没有排序。
+7. **`TopologyPage.tsx` 有 2509 行。** 保存、面板添加、连线编辑、快捷键等逻辑都堆在这一个组件里，所以上面这些问题很难被发现，也很难测试。
+
+---
+
+## 1. 现状：画布编辑模型（给 Cursor 的背景）
+
+```
+GET /views/{id} ──> graphQuery.data ──(graphToFlow)──> nodes / edges (本地 React state)
+                                                          │ 拖动/改名/连线/删除
+                                                          ▼
+                     dirtyRef + historyRef(撤销栈, UNDO_MAX=40)
+                     pendingEdgeCreatesRef / pendingEdgeDeletesRef
+                                                          │ Ctrl+S / 保存
+                                                          ▼
+  saveMut (TopologyPage.tsx:516)
+    1. 每条待建边 POST /fabric/edges          (逐条串行)
+    2. POST /fabric/edges/delete               (待删边)
+    3. POST /views/{id}/nodes                  (服务端没有的本地点；返回整图)
+    4. POST /views/{id}/nodes/remove           (本地没有的服务端点；返回整图)
+    5. PATCH /views/{id}/positions             (全部点的 x/y/label；返回整图)
+```
+
+旁路（不走保存，直接写库）：
+- 添加网元/拖入面板 `addPaletteItems` (`TopologyPage.tsx:621`)、投影外部邻居 `addOutsidePeers` (`:1047`)：写库后**用服务端图整体覆盖本地并 `clearDirty()`**
+- 连线样式 `patchSelectedEdgeStyle` (`:765`)：立即 `PATCH /edge-style`
+- 删除占位网元 `purgePlaceholderById` (`:1238`)：先把保存逻辑复制执行一遍，再清理
+
+脏状态下的轮询 (`useTopologyCanvas.ts:306-318`)：只合并在线状态、层级等叠加字段，不动几何信息，这部分是对的。
+
+---
+
+## 2. 问题清单与任务
+
+优先级：**P0** = 静默丢数据/误删，**P1** = 可靠性/性能，**P2** = 体验/可维护性。
+
+### T1 [P0] UI 保存会清除节点锁定 **[已验证]**
+
+- `flowToPositions` (`web/src/features/topology/lib/graphFlow.ts:90`) 不发送 `locked` 字段。
+- `ViewNodeIn.locked` 的默认值是 `False` (`netx_api/topology_schemas.py:277`)。
+- `patch_view_positions` 只在“行已锁定且请求也带 locked=True”时才跳过 (`topology_views_graph.py:738`)，否则会覆盖坐标并写回 `locked=False`。
+- MCP 会用 `locked=true` 固定布局（`packages/netx-topology-mcp/.../http_tools.py:1985`）。用户在 UI 里随便拖一下再保存，这个锁就没了。
+
+复现：MCP 把节点锁定在 (500,500)，UI 保存 (10,10)，结果节点变成 `locked=False x=10`。
+
+**修改：**
+1. 后端：把 `ViewNodeIn.locked` 改为 `bool | None = None`，`None` 表示保持原值。对已锁定的行，只有请求里明确带 `locked=False` 才能移动（解锁）；否则跳过并计入 `skipped_locked`。MCP 显式传 `locked` 的行为保持不变。
+2. 前端：在 `NeNodeData` 里加 `locked`（由 `graphToFlow` 从 `n.locked` 填入）。锁定的节点设 `draggable: false`，并显示一个锁形角标；`flowToPositions` 不再发送 `locked`。
+3. 保存结果里如果 `skipped_locked > 0`，用 toast 提示。
+
+**验收：**
+- 新增 `tests/test_topology.py::test_positions_preserve_lock_when_omitted`：锁定后用不带 locked 的 positions 请求，坐标不变，`locked` 仍为 True。
+- 新增 `test_positions_explicit_unlock_moves`：`locked=False` 可以移动并解锁。
+- 现有 MCP 相关测试全部通过。
+
+### T2 [P0] 保存会把设备名固化成节点标签 **[已验证]**
+
+- 接口返回的 `label` 已经做过回退：`vn.label` 为空时用 `fn.name / ip` (`topology_views_graph.py:195-197`)。
+- 前端把它放进 `data.label`，保存时 `flowToPositions` 又原样写回 `vn.label` (`graphFlow.ts:100`)。
+- 所以保存过一次之后，所有节点的 `vn.label` 都是当时的设备名。以后设备改名（例如 UME/网管同步），画布不会跟着变。
+
+复现：保存后把 fabric 节点改名为 `NEW-NAME`，画布仍显示 `OLD-NAME`。
+
+**修改：**
+1. 后端 `ViewNodeOut` 增加 `label_override: str`（原始 `vn.label`）；`label` 仍是回退后的显示值，保持兼容。`ViewNodeIn.label` 改为 `str | None = None`，`None` 表示不修改。
+2. 前端 `NeNodeData` 增加 `label_override`，只有用户“重命名节点”（`renameSelectedNode`，`TopologyPage.tsx:820`）时才写入。`flowToPositions` 只对 `label_override` 有变化的节点发送 `label`；重命名为空字符串表示清除覆盖，恢复跟随设备名。
+3. 数据修复脚本 `scripts/topology_clear_frozen_labels.py`，默认 dry-run：`vn.label` 等于当前 `fn.name` 或 `fn.ip` 的行，把 label 置空。输出受影响的行数，加 `--apply` 才真正写库。
+
+**验收：**
+- 新增 `test_positions_without_label_keeps_following_name`：保存不带 label，改名后画布 label 是新名称。
+- 新增 `test_label_override_survives_rename`：显式覆盖后改名，仍显示覆盖值。
+- 脚本 dry-run 在测试库上输出正确的计数，`--apply` 之后再跑一次计数为 0。
+
+### T3 [P0] 有未保存修改时“添加网元 / 投影邻居”会丢弃修改并留下隐形删除
+
+- `addPaletteItems` (`TopologyPage.tsx:681-686`) 和 `addOutsidePeers` (`:1096-1101`) 都是直接写库，然后 `applyViewGraph(refreshed)` 再 `clearDirty()`：
+  - 本地未保存的拖动、改名、删点**直接丢失**，也没有提示；
+  - `pendingEdgeDeletesRef` **没有清空**。被删除的边按服务端数据重新画回画布，但它的 id 还在待删队列里。用户以后再改任何东西并保存时，这条**看得见的边会被删掉**；
+  - 撤销栈也没有清空，撤销会回到和服务端不一致的快照。
+- 同类问题：`useTopologyCanvas.ts:320-355` 在非脏状态下整体刷新时，也不会清理撤销栈。
+
+**修改（推荐“先保存再添加”，简单而且语义清楚）：**
+1. 抽出 `commitCanvas()`（见 T6）。`addPaletteItems` / `addOutsidePeers` 开始时如果 `dirtyRef.current` 为 true，就弹窗“当前有未保存修改，保存后继续添加？”：确认则先 `commitCanvas()` 再添加，取消则中止。
+2. 新增一个统一的辅助函数 `resetLocalFromServer(graph)`，用于所有“用服务端图整体覆盖本地”的地方：同时清空两个 pending 集合、撤销栈和重做栈，然后 `clearDirty()`。目前 `purgePlaceholderById` (`:1289-1297`) 是手写的这套逻辑，其他地方都漏了。
+
+**验收（手工，Cursor 需要在 PR 描述里写明步骤和结果）：**
+1. 删除一条已有边 → 不保存 → 从面板拖入一个网元 → 应弹出确认框；选择保存后，该边被删除，新网元出现。
+2. 同上，但选择取消 → 不添加网元，删除操作仍处于未保存状态。
+3. 删除边 → 投影邻居（确认保存）→ 刷新页面，边确实被删除，没有“复活后又消失”。
+4. 用 grep 检查：所有 `applyViewGraph(` 调用点要么使用 `localPositions` 合并，要么经过 `resetLocalFromServer`。
+
+### T4 [P0] 修改已有连线的端口不会被保存
+
+- 右键菜单对任意单条边都显示端口输入框 (`TopologyCtxMenu.tsx:400-429`)。
+- `patchSelectedEdgeStyle` 修改本地端口后，只把样式字段发给 `PATCH /edge-style`（`ViewEdgeStylePatch` 本来就没有端口字段，`topology_schemas.py:450`），也没有 `markDirty()`。
+- 保存只处理 `pendingEdgeCreatesRef` 里的新边，已有边的端口修改永远不会提交。
+
+**修改：**
+1. 只有 `source === "manual"` 的边可以编辑端口；LLDP/UME 边的端口改为只读（这两类以采集结果为准，手工修改会在下次发现时被覆盖）。
+2. 未保存的新手工边：端口修改继续只改本地，保存时随建边一起提交（现有逻辑已支持）。
+3. 已保存的手工边：新增 `PATCH /v1/topology/fabric/edges/{id}`，body `{a_port, b_port}`，只允许 `source=manual`，否则 400 `edge_not_manual`；端口要做归一化，与已有边冲突（违反唯一约束）时返回 409。前端把修改记入 `pendingEdgePortEditsRef: Map<id,{a,b}>` 并 `markDirty()`，在 `commitCanvas()` 里提交。
+
+**验收：**
+- 新增 `test_patch_manual_edge_ports`、`test_patch_non_manual_edge_ports_rejected`、`test_patch_manual_edge_ports_conflict_409`。
+- 手工测试：修改已保存手工边的端口 → 出现未保存标记 → 保存 → 刷新后仍是新端口；LLDP 边的端口输入框为只读。
+
+### T5 [P1] 连线样式与撤销/保存模型不一致
+
+- `patchSelectedEdgeStyle` (`TopologyPage.tsx:807-815`) 每次修改都立即发请求（颜色选择器拖动时会连续发很多次）。同时调用了 `pushHistory()`，但撤销只回退本地状态，所以撤销后画布和数据库不一致。
+
+**修改：** 样式也改为走保存：记入 `pendingEdgeStyleRef: Map<edgeId, style>`，`markDirty()`，在 `commitCanvas()` 里批量提交（后端 `PATCH /edge-style` 支持 `items: []` 批量，旧的单条 body 保留兼容）。撤销快照要包含这个 Map。
+
+**验收：** 改颜色 → 撤销 → 保存 → 刷新，颜色是修改前的值；改颜色 → 保存 → 刷新，颜色是修改后的值；拖动颜色选择器期间，网络面板里没有 `/edge-style` 请求。
+
+### T6 [P1] 保存原子化，并去掉重复的保存逻辑
+
+现状见第 1 节。中途失败时，前面已执行的步骤（例如已建的边、已加的点）不会回滚，`pending*` 集合也只清了一部分。建边是幂等 upsert（`topology_fabric_links.py:65`），重试不会建出重复边，但删点和写坐标的顺序问题依然存在。
+
+**修改：**
+1. 后端新增 `POST /v1/topology/views/{id}/commit`，在一个事务里依次处理：
+   ```json
+   {
+     "edge_creates": [{"client_id":"local-..","a_node_id":"","b_node_id":"","a_port":"","b_port":""}],
+     "edge_deletes": ["edge-id"],
+     "edge_port_edits": [{"id":"","a_port":"","b_port":""}],
+     "edge_styles": [{"fabric_edge_id":"","stroke_color":"","stroke_width":0,"line_style":""}],
+     "node_adds": ["fabric-id"],
+     "node_removes": ["fabric-id"],
+     "positions": [{"fabric_node_id":"","x":0,"y":0,"label":null}]
+   }
+   ```
+   任何一步失败都整体回滚，返回 4xx 和 `{"failed_step": "...", "detail": "..."}`。成功时只返回**一次**完整图数据，外加 `edge_id_map: {client_id: server_id}`。节点上限和冻结规则与 `add_nodes_to_view` 一致。
+2. 前端新增 `hooks/useTopologySave.ts`，导出 `commitCanvas()`：从本地状态计算差异（纯函数 `lib/saveDiff.ts`，可以单独测试），调用 `/commit`，成功后调用 `resetLocalFromServer`。`saveMut`、`purgePlaceholderById` (`:1248-1281`)、T3 的“先保存”都改用它。
+3. 旧的分步接口保留（MCP 在用）。
+
+**验收：**
+- 新增 `test_view_commit_atomic_rollback`：构造一个 `edge_creates` 自环（第一步就失败），断言 `node_adds` 和 `positions` 都没有落库。
+- 新增 `test_view_commit_happy_path`：一次提交包含建边、删边、加点、删点、写坐标，结果图正确，`edge_id_map` 正确。
+- `web/tests/topologySaveDiff.test.mjs`：覆盖“本地新增/删除节点”“region 节点不进入增删列表”“只发送有变化的 label”“删除后又撤销的边不出现在 edge_deletes 中”等情况。
+- 手工测试：一次保存只产生 **1 个** 写请求（网络面板截图附在 PR 描述里）。
+
+### T7 [P1] 后端视图接口的 N+1 查询与不确定截断
+
+| 位置 | 问题 | 修改 |
+|---|---|---|
+| `topology_views_graph.py:719` | 写坐标时每个点各执行一次 `db.get(TopoFabricNode)`，最多 2000 次 | 先用一次 `IN` 查询拿到存在的 id 集合 |
+| `:160-166` | 节点超过 `VIEW_GRAPH_NODE_HARD_CAP` 时截断没有 `ORDER BY`，每次显示哪些节点不确定 | `order_by(TopoViewNode.created_at, TopoViewNode.id)` |
+| `:354-363` | 外部邻居的 `limit(5000)` 把**两端都在视图内**的边也算进去了，边密集的视图会漏掉外部邻居 | SQL 里排除两端都在视图内的边（`~and_(a.in_, b.in_)`），再加 `limit` |
+| `:375` | 每个外部邻居执行一次 `db.get` | 收集 id 后用一次 `IN` 查询 |
+| `:178-179` | region 节点每个执行一次 `db.get(TopoFolder)` | 一次 `IN` 查询 |
+
+**验收：**
+- 新增 `test_outside_peers_found_when_many_internal_edges`：视图内有 >5000 条内部边（测试中可以把上限改成参数，例如用 10 条模拟），外部邻居仍然能返回。
+- 新增 `test_view_truncation_is_deterministic`：两次 GET 返回同一批节点。
+- 用 SQLAlchemy `before_cursor_execute` 统计 2000 个点的 positions 请求，语句数 ≤ 10（写成测试）。
+
+### T8 [P1] positions 接口可以绕过节点上限加点
+
+`patch_view_positions` 遇到视图中没有的 `fabric_node_id` 会直接插入 `TopoViewNode`（`:720-733`），不检查 `max_nodes` 和冻结状态，而 `add_nodes_to_view` 会检查（`:778`）。
+
+**修改：** 先确认 MCP 是否依赖“positions 顺便加点”（用 grep 查 `packages/netx-topology-mcp` 里的 `positions` 调用）。如果不依赖，就改为跳过不存在的节点，并在返回里计入 `skipped_missing`；如果依赖，就加上与 `add_nodes_to_view` 相同的上限和冻结检查。**这一项的结论需要写进 PR 描述。**
+
+**验收：** 新增 `test_positions_respects_max_nodes`。
+
+### T9 [P2] 点击节点就会产生“未保存”和无效撤销记录
+
+`onNodeDragStart` 会无条件 `pushHistory()`；`onNodesChange` 收到任何 `position` 变更都会 `markDirty()`，包括没有实际移动的点击 (`TopologyReactFlowView.tsx:442-449`)。后果：单击一个节点就出现“未保存”，并且触发脏锁，live sync 不再整体刷新。
+
+**修改：** 在 `onNodeDragStart` 记录起点坐标；`onNodeDragStop` 时只有位移超过 1px 才把起始快照压入撤销栈并 `markDirty()`。`onNodesChange` 不再对 `position` 变更调用 `markDirty`（`remove`/`add` 保持不变）。
+
+**验收：** 单击节点后不出现未保存标记，撤销按钮保持禁用；拖动 10px 后出现未保存标记，并且可以撤销。
+
+### T10 [P2] 拆分 `TopologyPage.tsx`（在 T1–T6 完成后进行）
+
+目标是把主组件压到 ≤ 1200 行，**只搬代码、不改行为**：
+- `hooks/useTopologySave.ts`（T6）
+- `hooks/useTopologyPalette.ts`：`addPaletteItems`、`addOutsidePeers`、拖放、`neQuery`、`umeQuery`
+- `hooks/useTopologyEdgeEditing.ts`：`patchSelectedEdgeStyle`、`queueDeleteEdges`、`removeSelected`、`onConnect`、`isValidConnection`
+- `hooks/useTopologyKeyboard.ts`：全局快捷键（`:1130-1182`）。依赖改为通过 ref 读取，避免每次 `nodes`/`edges` 变化都重新绑定监听
+- `lib/moduleLinks.ts`：`openNeInventory`、`openWebcrtFor`、`openAlarmsFor`、`openPortTrafficForEdge`
+
+**验收：** `tsc -b` 通过；第 4 节的手工回归清单全部通过；`git diff --stat` 显示 TopologyPage.tsx 净减少 ≥ 1000 行。
+
+### T11 [P2] 修复修改前就存在的失败测试
+
+| 测试 | 原因 | 处理 |
+|---|---|---|
+| `test_ume_topology_apply.py::test_lldp_upgrades_bare_ume_ports_and_keeps_ume_primary` | **测试本身不稳定**：`rich_a/rich_b` 取自 `edge.a_port/b_port`（按节点 id 排序后的 A/B），但调用 upsert 时传的是 `a.id/b.id`（按 UME 名称取的节点）。uuid 排序不同时端口就配反了，结果约有一半概率失败。已用调试脚本确认这不是产品 bug。 | 改为传 `a_node_id=edge.a_node_id, b_node_id=edge.b_node_id`（`:358-365`）。`:297`、`:393` 有同样的写法，一起检查 |
+| `test_topology.py::test_lldp_discover_writes_fabric_edge`、`test_lldp_unmatched_creates_ssh_placeholder_ne` | 发现任务一直是 `pending`，没有变成 `done`（`:1285`、`:1458`） | 排查后台 worker 在 SQLite 内存库下是否被启动或被跳过，修好测试的启动方式，或者改为同步执行 job |
+| `test_topology.py::test_fabric_reconcile_scheduler_once_sweeps_orphans` | `0 not >= 1`（`:2287`） | 排查，可能和上一条同源 |
+
+**验收：** 两个测试文件 **0 失败**，并且连续跑 5 次都通过（用于检验不稳定性）。
+
+### 产品决定（2026-10-12 已确认）
+
+- **Q1**：`isValidConnection` (`TopologyPage.tsx:568`) 不允许在同一对网元之间画第二条手工连线，但 LLDP/UME 支持并行链路，画布也支持聚合显示。是否应该允许手工建并行链路（端口不同即可）？
+- **Q2**：T3 选择了“先保存再添加”。如果希望“添加后保留本地未保存修改”，实现会复杂很多（需要把服务端新增部分合并进本地），请确认。
+
+- **结论**：Q1 不允许手工画并行链路，保持 `isValidConnection`（现位于 `hooks/useTopologyEdgeEditing.ts`）现状；Q2 沿用“先保存再添加”。
+
+---
+
+## 3. 建议实施顺序
+
+1. **T11**（先把基线修到全部通过，后面每一步的回归才有意义）
+2. **T1 + T2**（后端 schema 改动，两项一起做，再加数据修复脚本）
+3. **T6**（commit 接口 + `useTopologySave`），然后在它之上做 **T3、T4、T5**
+4. **T7、T8**
+5. **T9**，最后做 **T10**（纯重构，单独一个 PR）
+
+每一步单独提交；T10 必须单独成 PR。
+
+## 4. 回归命令与手工清单
+
+```bash
+python -m pytest tests/test_topology.py tests/test_ume_topology_apply.py -q
+```
+
+```bash
+cd web && npx tsc -b
+```
+
+```bash
+cd web && node --experimental-strip-types --test tests/topologySaveDiff.test.mjs
+```
+
+> `lib/saveDiff.ts` 只放纯函数，除 `import type` 外不要有运行时 import（Node strip-types 不会解析不带扩展名的相对路径）。写法参考现有的 `web/tests/cutoverDataCache.test.mjs`。
+
+手工回归（每个 PR 都要过一遍，结果写进 PR 描述）：
+1. 拖动节点 → 保存 → 刷新，位置保持。
+2. 新建手工连线（带端口）→ 保存 → 刷新，连线和端口都在。
+3. 删除连线 → 撤销 → 保存，连线仍然存在。
+4. 删除节点 → 保存，节点从视图中移除，但 fabric 中仍存在（可以通过搜索找到）。
+5. 重命名节点 → 保存 → 刷新，显示新名称；再把名称清空 → 保存，恢复为设备名。
+6. 打开 live sync，另一个窗口用 MCP 移动节点，3 秒内本窗口同步；本窗口有未保存修改时不会被覆盖，只刷新在线状态。
+7. 只读用户（没有 `ne:write`）：不能拖动、连线、保存，右键菜单里没有写操作。
+8. 删除占位网元（有未保存修改时），修改先被保存，占位网元被清理。
+9. 导出 SVG/XML 正常。
+
+---
+
+## 5. 验收记录（2026-10-12）
+
+Cursor 完成 T1–T11 后由 Claude 验收并接手修复，结论：主体实现正确，另修 6 个问题（均补了回归测试）：
+
+1. `/commit` 同次 `node_adds` 的节点坐标被忽略（`autoflush=False` 下重查看不到新行）→ 先 `flush`；`_apply_positions` 的逐点 `db.get` 改为批量。
+2. T8 收紧后，无放置行的旧子区域图标拖动无法保存 → `add_missing_region_placement`（仅限本画布的手工子区域）。
+3. MCP `updateTopologyViewPositions` 总是发送 `label:""`、`locked:false`，会清掉 UI 重命名并解锁 → 未提供则不发送。
+4. 已改样式/端口的边被删除后保存 404 → 前端 `saveDiff` 与后端都跳过已删边；新建本地边的样式经 `edge_id_map` 映射。
+5. 框选拖动、方向键移动不标记未保存 → 补 `onSelectionDrag*` 和键盘移动判定。
+6. （改动前已存在）大视图打开空白、远处节点定位失效：xyflow `fitView` 等待节点测量，而 `onlyRenderVisibleElements` 下视口外节点永不测量 → `lib/fitNodes.ts` 按已知几何计算 `fitBounds`。
+
+开发库数据修复：`topology_clear_frozen_labels.py --apply` 清理 516 条固化标签（执行前已备份原值）。
+
+回归：拓扑后端 91 通过；Web Node 测试 30 通过；`tsc -b` 通过；MCP 包 238 通过 / 5 失败（与改动前同一批，既有问题）。

netx_api/topology_region_canvas.py

@@ -121,6 +121,39 @@ def place_child_region_on_parent_canvas(
     return row
 
 
+def add_missing_region_placement(
+    db: Session, view: TopoView, fabric_node_id: str, *, x: float, y: float
+) -> TopoViewNode | None:
+    """Persist a child-region icon that was only synthesized (no placement row yet).
+
+    Returns None unless ``fabric_node_id`` is a manual child region of the view's folder.
+    """
+    if not is_region_canvas_node_id(fabric_node_id) or _is_world_flat(view):
+        return None
+    folder = db.get(TopoFolder, region_folder_id_from_node(fabric_node_id))
+    if (
+        folder is None
+        or str(folder.kind or "") != "region"
+        or str(folder.parent_id or "") != str(view.folder_id or "")
+        or _is_ume_managed_folder(folder)
+    ):
+        return None
+    now = _utcnow()
+    row = TopoViewNode(
+        id=uuid4().hex,
+        view_id=view.id,
+        fabric_node_id=fabric_node_id,
+        x=float(x),
+        y=float(y),
+        label="",
+        locked=False,
+        created_at=now,
+        updated_at=now,
+    )
+    db.add(row)
+    return row
+
+
 def remove_region_canvas_placements(db: Session, folder_id: str) -> int:
     """Drop this folder's icon from any parent canvas."""
     nid = region_canvas_node_id(folder_id)
@@ -139,6 +172,7 @@ def region_node_out(
     y: float,
     locked: bool = False,
     label: str = "",
+    label_override: str | None = None,
 ) -> ViewNodeOut:
     child_view = _child_primary_view(db, folder.id)
     kids = (
@@ -154,12 +188,14 @@ def region_node_out(
             .filter(TopoViewNode.view_id == child_view.id)
             .count()
         )
-    display = (label or folder.name or folder.id)[:256]
+    raw = str(label_override if label_override is not None else label or "")
+    display = (raw or folder.name or folder.id)[:256]
     return ViewNodeOut(
         fabric_node_id=region_canvas_node_id(folder.id),
         managed_ne_id="",
         ume_ne_id="",
         label=display,
+        label_override=raw[:256],
         x=float(x),
         y=float(y),
         locked=bool(locked),

netx_api/topology_router.py

@@ -38,6 +38,8 @@ from .topology_schemas import (
     TopologyPlaceholderCreate,
     TopologyViewCreate,
     TopologyViewUpdate,
+    FabricEdgePortsPatch,
+    ViewCommitIn,
     ViewEdgeStylePatch,
     ViewNodesAdd,
     ViewNodesRemove,
@@ -61,6 +63,7 @@ from .topology_fabric import (
 from .topology_views import (
     add_nodes_to_view,
     bootstrap_topology_tree,
+    commit_view_changes,
     create_folder,
     create_topology_placeholder_on_view,
     create_view,
@@ -69,6 +72,7 @@ from .topology_views import (
     get_topology_tree,
     get_view_graph,
     list_views,
+    patch_manual_edge_ports,
     patch_view_edge_style,
     patch_view_positions,
     populate_view,
@@ -481,6 +485,32 @@ def api_edge_style(
     return patch_view_edge_style(db, view_id, body).model_dump()
 
 
+@router.post("/views/{view_id}/commit")
+def api_commit_view(
+    view_id: str, body: ViewCommitIn, db: Session = Depends(get_db)
+) -> dict[str, Any]:
+    return commit_view_changes(db, view_id, body).model_dump()
+
+
+@router.patch("/fabric/edges/{edge_id}")
+def api_patch_fabric_edge_ports(
+    edge_id: str, body: FabricEdgePortsPatch, db: Session = Depends(get_db)
+) -> dict[str, Any]:
+    edge = patch_manual_edge_ports(
+        db, edge_id, a_port=body.a_port, b_port=body.b_port, commit=True
+    )
+    return {
+        "id": edge.id,
+        "a_node_id": edge.a_node_id,
+        "b_node_id": edge.b_node_id,
+        "a_port": edge.a_port or "",
+        "b_port": edge.b_port or "",
+        "source": edge.source or "manual",
+        "status": edge.status or "active",
+        "layer": edge.layer or "physical",
+    }
+
+
 # --- Classify rules / slices / search ---------------------------------------
 
 

netx_api/topology_schemas.py

@@ -273,8 +273,10 @@ class ViewNodeIn(BaseModel):
     fabric_node_id: str = Field(min_length=1, max_length=64)
     x: float = 0.0
     y: float = 0.0
-    label: str = ""
-    locked: bool = False
+    # None = leave existing override unchanged; "" = clear override (follow device name).
+    label: str | None = None
+    # None = leave lock unchanged; False unlocks (and allows move); True locks after move.
+    locked: bool | None = None
 
 
 class ViewNodeOut(BaseModel):
@@ -282,6 +284,8 @@ class ViewNodeOut(BaseModel):
     managed_ne_id: str = ""
     ume_ne_id: str = ""
     label: str = ""
+    # Raw placement override (empty = follow fabric name/ip). ``label`` is the display value.
+    label_override: str = ""
     x: float = 0.0
     y: float = 0.0
     locked: bool = False
@@ -448,6 +452,16 @@ class ViewNodesRemove(BaseModel):
 
 
 class ViewEdgeStylePatch(BaseModel):
+    """Single-edge style patch (legacy). Prefer ``items`` for batch."""
+
+    fabric_edge_id: str = ""
+    stroke_color: str = ""
+    stroke_width: int = Field(default=0, ge=0, le=12)
+    line_style: str = Field(default="", max_length=16)
+    items: list["ViewEdgeStyleItem"] = Field(default_factory=list)
+
+
+class ViewEdgeStyleItem(BaseModel):
     fabric_edge_id: str
     stroke_color: str = ""
     stroke_width: int = Field(default=0, ge=0, le=12)
@@ -461,6 +475,11 @@ class FabricManualEdgeIn(BaseModel):
     b_port: str = ""
 
 
+class FabricEdgePortsPatch(BaseModel):
+    a_port: str = ""
+    b_port: str = ""
+
+
 class FabricEdgesDeleteRequest(BaseModel):
     edge_ids: list[str] = Field(default_factory=list, min_length=1)
 
@@ -469,6 +488,40 @@ class FabricEdgesDeleteOut(BaseModel):
     deleted: int = 0
 
 
+class ViewCommitEdgeCreate(BaseModel):
+    client_id: str = ""
+    a_node_id: str = Field(min_length=1, max_length=64)
+    b_node_id: str = Field(min_length=1, max_length=64)
+    a_port: str = ""
+    b_port: str = ""
+
+
+class ViewCommitEdgePortEdit(BaseModel):
+    id: str = Field(min_length=1, max_length=64)
+    a_port: str = ""
+    b_port: str = ""
+
+
+class ViewCommitIn(BaseModel):
+    """Atomic canvas save: all steps succeed or the whole request rolls back."""
+
+    edge_creates: list[ViewCommitEdgeCreate] = Field(default_factory=list)
+    edge_deletes: list[str] = Field(default_factory=list)
+    edge_port_edits: list[ViewCommitEdgePortEdit] = Field(default_factory=list)
+    edge_styles: list[ViewEdgeStyleItem] = Field(default_factory=list)
+    node_adds: list[str] = Field(default_factory=list)
+    node_removes: list[str] = Field(default_factory=list)
+    positions: list[ViewNodeIn] = Field(default_factory=list)
+
+
+class ViewCommitOut(BaseModel):
+    ok: bool = True
+    view_id: str = ""
+    edge_id_map: dict[str, str] = Field(default_factory=dict)
+    skipped_locked: int = 0
+    graph: TopologyViewGraphOut | None = None
+
+
 # ---------------------------------------------------------------------------
 # Classify rules + slices + search
 # ---------------------------------------------------------------------------

netx_api/topology_service.py

@@ -39,6 +39,7 @@ from .topology_views import (
     _place_fabric_ids_on_view,
     add_nodes_to_view,
     bootstrap_topology_tree,
+    commit_view_changes,
     create_folder,
     create_topology_placeholder_on_view,
     create_view,
@@ -48,6 +49,7 @@ from .topology_views import (
     get_topology_tree,
     get_view_graph,
     list_views,
+    patch_manual_edge_ports,
     patch_view_edge_style,
     patch_view_positions,
     populate_view,
@@ -68,6 +70,7 @@ __all__ = [
     "_place_fabric_ids_on_view",
     "add_nodes_to_view",
     "bootstrap_topology_tree",
+    "commit_view_changes",
     "create_folder",
     "create_topology_placeholder_on_view",
     "create_view",
@@ -88,6 +91,7 @@ __all__ = [
     "list_fabric_nodes",
     "list_views",
     "merge_duplicate_fabric_nodes",
+    "patch_manual_edge_ports",
     "patch_view_edge_style",
     "patch_view_positions",
     "pause_discover_job",

netx_api/topology_views.py

@@ -1,6 +1,7 @@
 """Topology folder tree and leaf view operations (facade)."""
 from __future__ import annotations
 
+from .topology_views_commit import commit_view_changes, patch_manual_edge_ports
 from .topology_views_graph import (
     _place_fabric_ids_on_view,
     add_nodes_to_view,
@@ -29,6 +30,7 @@ __all__ = [
     "_place_fabric_ids_on_view",
     "add_nodes_to_view",
     "bootstrap_topology_tree",
+    "commit_view_changes",
     "create_folder",
     "create_topology_placeholder_on_view",
     "create_view",
@@ -38,6 +40,7 @@ __all__ = [
     "get_topology_tree",
     "get_view_graph",
     "list_views",
+    "patch_manual_edge_ports",
     "patch_view_edge_style",
     "patch_view_positions",
     "populate_view",

netx_api/topology_views_commit.py

@@ -0,0 +1,444 @@
+"""Atomic view canvas commit (single transaction)."""
+
+from __future__ import annotations
+
+import re
+from typing import Any
+from uuid import uuid4
+
+from fastapi import HTTPException
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import Session
+
+from .models import (
+    TopoFabricEdge,
+    TopoFabricNode,
+    TopoViewEdgeStyle,
+    TopoViewNode,
+)
+from .topology_common import VIEW_GRAPH_NODE_HARD_CAP, _utcnow
+from .topology_fabric_links import upsert_fabric_edge
+from .topology_fabric_nodes import _normalize_endpoints, refresh_fabric_stats
+from .topology_region_canvas import add_missing_region_placement, is_region_canvas_node_id
+from .topology_schemas import (
+    TopologyViewGraphOut,
+    ViewCommitIn,
+    ViewCommitOut,
+    ViewEdgeStyleItem,
+    ViewNodeIn,
+)
+from .topology_views_graph import (
+    _get_view_or_404,
+    _membership_for_view,
+    get_view_graph,
+)
+from .ume_topology_world import is_world_flat_view
+
+_HEX_COLOR_RE = re.compile(r"^#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$")
+_LINE_STYLES = {"", "solid", "dashed", "dotted"}
+
+
+def _fail(step: str, detail: str, *, status: int = 400) -> None:
+    raise HTTPException(
+        status_code=status,
+        detail={"failed_step": step, "detail": detail},
+    )
+
+
+def _apply_edge_creates(
+    db: Session, creates: list[Any], edge_id_map: dict[str, str]
+) -> None:
+    for item in creates:
+        a = str(getattr(item, "a_node_id", "") or "").strip()
+        b = str(getattr(item, "b_node_id", "") or "").strip()
+        if not a or not b:
+            _fail("edge_creates", "edge_endpoints_required")
+        edge, action = upsert_fabric_edge(
+            db,
+            a_node_id=a,
+            b_node_id=b,
+            a_port=str(getattr(item, "a_port", "") or ""),
+            b_port=str(getattr(item, "b_port", "") or ""),
+            source="manual",
+        )
+        if edge is None or action == "skipped_self_loop":
+            _fail("edge_creates", "edge_self_loop")
+        client_id = str(getattr(item, "client_id", "") or "").strip()
+        if client_id:
+            edge_id_map[client_id] = str(edge.id)
+
+
+def _apply_edge_deletes(db: Session, edge_ids: list[str]) -> set[str]:
+    """Delete edges; return the ids that were requested (for skipping later edits)."""
+    ids = [str(x).strip() for x in (edge_ids or []) if str(x).strip()]
+    if not ids:
+        return set()
+    seen: set[str] = set()
+    ordered: list[str] = []
+    for i in ids:
+        if i in seen:
+            continue
+        seen.add(i)
+        ordered.append(i)
+    rows = db.query(TopoFabricEdge).filter(TopoFabricEdge.id.in_(ordered)).all()
+    found_ids = [str(r.id) for r in rows]
+    if not found_ids:
+        return seen
+    db.query(TopoViewEdgeStyle).filter(
+        TopoViewEdgeStyle.fabric_edge_id.in_(found_ids)
+    ).delete(synchronize_session=False)
+    db.query(TopoFabricEdge).filter(TopoFabricEdge.id.in_(found_ids)).delete(
+        synchronize_session=False
+    )
+    return seen
+
+
+def patch_manual_edge_ports(
+    db: Session,
+    edge_id: str,
+    *,
+    a_port: str,
+    b_port: str,
+    commit: bool = True,
+) -> TopoFabricEdge:
+    """Update ports on a manual fabric edge. Raises 400/404/409."""
+    eid = str(edge_id or "").strip()
+    row = db.get(TopoFabricEdge, eid) if eid else None
+    if row is None:
+        raise HTTPException(status_code=404, detail="fabric_edge_not_found")
+    if str(row.source or "").strip().lower() != "manual":
+        raise HTTPException(status_code=400, detail="edge_not_manual")
+    _a, _b, ap, bp = _normalize_endpoints(
+        row.a_node_id,
+        row.b_node_id,
+        str(a_port or ""),
+        str(b_port or ""),
+    )
+    conflict = (
+        db.query(TopoFabricEdge)
+        .filter(
+            TopoFabricEdge.id != row.id,
+            TopoFabricEdge.layer == row.layer,
+            TopoFabricEdge.a_node_id == row.a_node_id,
+            TopoFabricEdge.b_node_id == row.b_node_id,
+            TopoFabricEdge.a_port == ap,
+            TopoFabricEdge.b_port == bp,
+        )
+        .one_or_none()
+    )
+    if conflict is not None:
+        raise HTTPException(status_code=409, detail="edge_port_conflict")
+    row.a_port = ap
+    row.b_port = bp
+    row.updated_at = _utcnow()
+    try:
+        db.flush()
+    except IntegrityError as exc:
+        raise HTTPException(status_code=409, detail="edge_port_conflict") from exc
+    if commit:
+        db.commit()
+        db.refresh(row)
+    return row
+
+
+def _apply_edge_port_edits(db: Session, edits: list[Any], *, deleted: set[str]) -> None:
+    for item in edits:
+        eid = str(getattr(item, "id", "") or "").strip()
+        if not eid:
+            _fail("edge_port_edits", "edge_id_required")
+        if eid in deleted:
+            continue
+        try:
+            patch_manual_edge_ports(
+                db,
+                eid,
+                a_port=str(getattr(item, "a_port", "") or ""),
+                b_port=str(getattr(item, "b_port", "") or ""),
+                commit=False,
+            )
+        except HTTPException as exc:
+            detail = exc.detail if isinstance(exc.detail, str) else "edge_port_edit_failed"
+            _fail("edge_port_edits", str(detail), status=int(exc.status_code or 400))
+
+
+def _upsert_edge_style(
+    db: Session,
+    view_id: str,
+    item: ViewEdgeStyleItem,
+    *,
+    now,
+) -> None:
+    eid = str(item.fabric_edge_id or "").strip()
+    if not eid or db.get(TopoFabricEdge, eid) is None:
+        _fail("edge_styles", "fabric_edge_not_found", status=404)
+    color = str(item.stroke_color or "").strip()
+    if color and not _HEX_COLOR_RE.match(color):
+        _fail("edge_styles", "invalid_stroke_color")
+    width = int(item.stroke_width or 0)
+    if width < 0 or width > 12:
+        _fail("edge_styles", "invalid_stroke_width")
+    style = str(item.line_style or "").strip().lower()
+    if style not in _LINE_STYLES:
+        _fail("edge_styles", "invalid_line_style")
+    row = (
+        db.query(TopoViewEdgeStyle)
+        .filter(
+            TopoViewEdgeStyle.view_id == view_id,
+            TopoViewEdgeStyle.fabric_edge_id == eid,
+        )
+        .one_or_none()
+    )
+    if row is None:
+        db.add(
+            TopoViewEdgeStyle(
+                id=uuid4().hex,
+                view_id=view_id,
+                fabric_edge_id=eid,
+                stroke_color=color,
+                stroke_width=width,
+                line_style=style,
+                created_at=now,
+                updated_at=now,
+            )
+        )
+    else:
+        row.stroke_color = color
+        row.stroke_width = width
+        row.line_style = style
+        row.updated_at = now
+
+
+def _apply_edge_styles(
+    db: Session,
+    view_id: str,
+    styles: list[ViewEdgeStyleItem],
+    *,
+    edge_id_map: dict[str, str],
+    deleted: set[str],
+) -> None:
+    now = _utcnow()
+    for item in styles:
+        eid = str(item.fabric_edge_id or "").strip()
+        if eid in deleted:
+            continue
+        # Styles on a just-created local edge are keyed by its client id.
+        if eid in edge_id_map:
+            item = item.model_copy(update={"fabric_edge_id": edge_id_map[eid]})
+        _upsert_edge_style(db, view_id, item, now=now)
+
+
+def _apply_node_adds(
+    db: Session,
+    view,
+    fabric_ids: list[str],
+    *,
+    max_nodes: int,
+    existing: dict[str, TopoViewNode],
+) -> None:
+    if is_world_flat_view(view):
+        _fail("node_adds", "world_map_no_direct_nes")
+    ids = [str(x).strip() for x in (fabric_ids or []) if str(x).strip()]
+    if not ids:
+        return
+    if len(existing) >= max_nodes:
+        _fail("node_adds", "membership_max_nodes")
+    now = _utcnow()
+    room = max(0, max_nodes - len(existing))
+    added = 0
+    for fid in ids:
+        if fid in existing:
+            continue
+        if is_region_canvas_node_id(fid):
+            continue
+        if db.get(TopoFabricNode, fid) is None:
+            _fail("node_adds", f"fabric_node_not_found:{fid}")
+        if added >= room:
+            _fail("node_adds", "membership_max_nodes")
+        row = TopoViewNode(
+            id=uuid4().hex,
+            view_id=view.id,
+            fabric_node_id=fid,
+            x=40.0,
+            y=40.0,
+            label="",
+            locked=False,
+            created_at=now,
+            updated_at=now,
+        )
+        db.add(row)
+        existing[fid] = row
+        added += 1
+    if added:
+        view.updated_at = now
+
+
+def _apply_node_removes(
+    db: Session,
+    view,
+    fabric_ids: list[str],
+    *,
+    existing: dict[str, TopoViewNode],
+) -> None:
+    ids = [str(x).strip() for x in (fabric_ids or []) if str(x).strip()]
+    ids = [x for x in ids if x and not is_region_canvas_node_id(x)]
+    if not ids:
+        return
+    db.query(TopoViewNode).filter(
+        TopoViewNode.view_id == view.id,
+        TopoViewNode.fabric_node_id.in_(ids),
+    ).delete(synchronize_session=False)
+    for fid in ids:
+        existing.pop(fid, None)
+    view.updated_at = _utcnow()
+
+
+def _apply_positions(
+    db: Session,
+    view,
+    positions: list[ViewNodeIn],
+    *,
+    existing: dict[str, TopoViewNode],
+) -> int:
+    """Apply positions in-session. Returns skipped_locked count."""
+    if len(positions) > VIEW_GRAPH_NODE_HARD_CAP:
+        _fail("positions", "too_many_positions")
+    now = _utcnow()
+    skipped_locked = 0
+    updated = 0
+    fabric_ids = [
+        str(p.fabric_node_id or "").strip()
+        for p in positions
+        if str(p.fabric_node_id or "").strip()
+        and not is_region_canvas_node_id(str(p.fabric_node_id or "").strip())
+    ]
+    alive = (
+        {str(r[0]) for r in db.query(TopoFabricNode.id).filter(TopoFabricNode.id.in_(fabric_ids))}
+        if fabric_ids
+        else set()
+    )
+    for p in positions:
+        fid = str(p.fabric_node_id or "").strip()
+        if not fid:
+            continue
+        if not is_region_canvas_node_id(fid) and fid not in alive and fid not in existing:
+            # Missing fabric: skip rather than fail mid-commit when node was just removed.
+            continue
+        row = existing.get(fid)
+        if row is None:
+            # Fabric NEs are placed via node_adds; only synthesized child-region icons are created here.
+            row = add_missing_region_placement(db, view, fid, x=p.x, y=p.y)
+            if row is None:
+                continue
+            existing[fid] = row
+        if row.locked and p.locked is not False:
+            skipped_locked += 1
+            continue
+        row.x = float(p.x or 0)
+        row.y = float(p.y or 0)
+        if p.label is not None:
+            row.label = str(p.label or "")[:256]
+        if p.locked is not None:
+            row.locked = bool(p.locked)
+        row.updated_at = now
+        updated += 1
+    if updated or skipped_locked:
+        view.updated_at = now
+    return skipped_locked
+
+
+def commit_view_changes(db: Session, view_id: str, body: ViewCommitIn) -> ViewCommitOut:
+    """Apply canvas mutations atomically; return one graph + client→server edge map."""
+    view = _get_view_or_404(db, view_id)
+    mem = _membership_for_view(view)
+    max_nodes = int(mem.get("max_nodes") or 300)
+    existing = {
+        vn.fabric_node_id: vn
+        for vn in db.query(TopoViewNode).filter(TopoViewNode.view_id == view.id).all()
+    }
+    edge_id_map: dict[str, str] = {}
+    skipped_locked = 0
+
+    try:
+        _apply_edge_creates(db, list(body.edge_creates or []), edge_id_map)
+        deleted = _apply_edge_deletes(db, list(body.edge_deletes or []))
+        _apply_edge_port_edits(db, list(body.edge_port_edits or []), deleted=deleted)
+        _apply_edge_styles(
+            db,
+            view.id,
+            list(body.edge_styles or []),
+            edge_id_map=edge_id_map,
+            deleted=deleted,
+        )
+        _apply_node_adds(
+            db,
+            view,
+            list(body.node_adds or []),
+            max_nodes=max_nodes,
+            existing=existing,
+        )
+        _apply_node_removes(
+            db,
+            view,
+            list(body.node_removes or []),
+            existing=existing,
+        )
+        # Re-load placements after add/remove so positions see current rows.
+        # Flush first: sessions run with autoflush=False, so new placements would be invisible.
+        db.flush()
+        existing = {
+            vn.fabric_node_id: vn
+            for vn in db.query(TopoViewNode).filter(TopoViewNode.view_id == view.id).all()
+        }
+        skipped_locked = _apply_positions(
+            db,
+            view,
+            list(body.positions or []),
+            existing=existing,
+        )
+        db.commit()
+    except HTTPException:
+        db.rollback()
+        raise
+    except Exception as exc:  # noqa: BLE001
+        db.rollback()
+        _fail("commit", str(exc)[:500], status=500)
+
+    try:
+        refresh_fabric_stats(db)
+    except Exception:  # noqa: BLE001
+        pass
+
+    graph: TopologyViewGraphOut = get_view_graph(db, view.id)
+    return ViewCommitOut(
+        ok=True,
+        view_id=view.id,
+        edge_id_map=edge_id_map,
+        skipped_locked=skipped_locked,
+        graph=graph,
+    )
+
+
+def normalize_edge_style_items(body: Any) -> list[ViewEdgeStyleItem]:
+    """Accept legacy single-edge body or batch ``items``."""
+    items = list(getattr(body, "items", None) or [])
+    if items:
+        return [
+            ViewEdgeStyleItem(
+                fabric_edge_id=str(i.fabric_edge_id or ""),
+                stroke_color=str(i.stroke_color or ""),
+                stroke_width=int(i.stroke_width or 0),
+                line_style=str(i.line_style or ""),
+            )
+            for i in items
+        ]
+    fid = str(getattr(body, "fabric_edge_id", "") or "").strip()
+    if not fid:
+        return []
+    return [
+        ViewEdgeStyleItem(
+            fabric_edge_id=fid,
+            stroke_color=str(getattr(body, "stroke_color", "") or ""),
+            stroke_width=int(getattr(body, "stroke_width", 0) or 0),
+            line_style=str(getattr(body, "line_style", "") or ""),
+        )
+    ]

netx_api/topology_views_graph.py

@@ -157,7 +157,12 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
     # Save/mutate return_graph must use the same UME synthetic graph as GET.
     if is_ume_canvas_view(view):
         return get_ume_canvas_graph(db, view_id)
-    vnodes = db.query(TopoViewNode).filter(TopoViewNode.view_id == view.id).all()
+    vnodes = (
+        db.query(TopoViewNode)
+        .filter(TopoViewNode.view_id == view.id)
+        .order_by(TopoViewNode.created_at.asc(), TopoViewNode.id.asc())
+        .all()
+    )
     truncated = False
     reason = ""
     if len(vnodes) > VIEW_GRAPH_NODE_HARD_CAP:
@@ -169,6 +174,19 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
         n.id: n for n in db.query(TopoFabricNode).filter(TopoFabricNode.id.in_(fids)).all()
     } if fids else {}
     managed_by_id, ume_by_id = _batch_ne_lookups(db, fabric_nodes)
+    region_folder_ids = [
+        region_folder_id_from_node(vn.fabric_node_id)
+        for vn in vnodes
+        if is_region_canvas_node_id(vn.fabric_node_id)
+    ]
+    folders_by_id = {
+        f.id: f
+        for f in (
+            db.query(TopoFolder).filter(TopoFolder.id.in_(region_folder_ids)).all()
+            if region_folder_ids
+            else []
+        )
+    }
     filt = dict(view.filter or {})
     layer = str(filt.get("layer") or "physical").strip() or "physical"
     status = str(filt.get("status") or "").strip().lower()
@@ -176,7 +194,7 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
     region_ids_seen: set[str] = set()
     for vn in vnodes:
         if is_region_canvas_node_id(vn.fabric_node_id):
-            folder = db.get(TopoFolder, region_folder_id_from_node(vn.fabric_node_id))
+            folder = folders_by_id.get(region_folder_id_from_node(vn.fabric_node_id))
             if folder is None or str(folder.kind or "") != "region":
                 continue
             region_ids_seen.add(folder.id)
@@ -187,12 +205,13 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
                     x=float(vn.x or 0),
                     y=float(vn.y or 0),
                     locked=bool(vn.locked),
-                    label=str(vn.label or folder.name or ""),
+                    label_override=str(vn.label or ""),
                 )
             )
             continue
         fn = fabric_nodes.get(vn.fabric_node_id)
-        label = (vn.label or "").strip()
+        label_override = str(vn.label or "")
+        label = label_override.strip()
         if not label and fn is not None:
             label = (fn.name or fn.ip or vn.fabric_node_id)[:256]
         connect_status = ""
@@ -216,6 +235,7 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
                 managed_ne_id=(fn.managed_ne_id if fn else "") or "",
                 ume_ne_id=(fn.ume_ne_id if fn else "") or "",
                 label=label,
+                label_override=label_override[:256],
                 x=float(vn.x or 0),
                 y=float(vn.y or 0),
                 locked=bool(vn.locked),
@@ -348,22 +368,31 @@ def _outside_peers_for_view(
     member_ids: set[str],
     layer: str,
     limit: int = 50,
+    edge_scan_limit: int = 5000,
 ) -> list[dict[str, str]]:
     if not member_ids:
         return []
+    members = list(member_ids)
+    # Exclude edges whose both ends are already on the view so dense canvases
+    # do not burn the scan budget before any external neighbor is found.
+    both_internal = and_(
+        TopoFabricEdge.a_node_id.in_(members),
+        TopoFabricEdge.b_node_id.in_(members),
+    )
     edges = (
         db.query(TopoFabricEdge)
         .filter(
             TopoFabricEdge.layer == layer,
             or_(
-                TopoFabricEdge.a_node_id.in_(list(member_ids)),
-                TopoFabricEdge.b_node_id.in_(list(member_ids)),
+                TopoFabricEdge.a_node_id.in_(members),
+                TopoFabricEdge.b_node_id.in_(members),
             ),
+            ~both_internal,
         )
-        .limit(5000)
+        .limit(max(1, int(edge_scan_limit or 5000)))
         .all()
     )
-    out: list[dict[str, str]] = []
+    peer_via: list[tuple[str, str]] = []
     seen: set[str] = set()
     for e in edges:
         for peer_id, local_id in ((e.b_node_id, e.a_node_id), (e.a_node_id, e.b_node_id)):
@@ -372,17 +401,29 @@ def _outside_peers_for_view(
             if peer_id in seen:
                 continue
             seen.add(peer_id)
-            fn = db.get(TopoFabricNode, peer_id)
-            out.append(
-                {
-                    "fabric_node_id": peer_id,
-                    "name": (fn.name if fn else "") or "",
-                    "ip": (fn.ip if fn else "") or "",
-                    "via_node_id": local_id,
-                }
-            )
-            if len(out) >= limit:
-                return out
+            peer_via.append((peer_id, local_id))
+            if len(peer_via) >= limit:
+                break
+        if len(peer_via) >= limit:
+            break
+    if not peer_via:
+        return []
+    peer_ids = [p for p, _ in peer_via]
+    peers = {
+        n.id: n
+        for n in db.query(TopoFabricNode).filter(TopoFabricNode.id.in_(peer_ids)).all()
+    }
+    out: list[dict[str, str]] = []
+    for peer_id, local_id in peer_via:
+        fn = peers.get(peer_id)
+        out.append(
+            {
+                "fabric_node_id": peer_id,
+                "name": (fn.name if fn else "") or "",
+                "ip": (fn.ip if fn else "") or "",
+                "via_node_id": local_id,
+            }
+        )
     return out
 
 
@@ -646,6 +687,7 @@ def patch_view_positions(
     layout = str(body.layout or "").strip().lower()
     updated = 0
     skipped_locked = 0
+    skipped_missing = 0
     matched = 0
 
     existing = {
@@ -706,45 +748,54 @@ def patch_view_positions(
                 row.updated_at = now
                 updated += 1
     else:
+        from .topology_region_canvas import add_missing_region_placement, is_region_canvas_node_id
+
         positions = list(body.positions or [])
         if len(positions) > VIEW_GRAPH_NODE_HARD_CAP:
             raise HTTPException(status_code=400, detail="too_many_positions")
         matched = len(positions)
+        # One IN query instead of per-node db.get (N+1).
+        check_ids = [
+            str(p.fabric_node_id or "").strip()
+            for p in positions
+            if str(p.fabric_node_id or "").strip()
+            and not is_region_canvas_node_id(str(p.fabric_node_id or "").strip())
+        ]
+        fabric_alive: set[str] = set()
+        if check_ids:
+            fabric_alive = {
+                str(x[0])
+                for x in db.query(TopoFabricNode.id)
+                .filter(TopoFabricNode.id.in_(check_ids))
+                .all()
+            }
         for p in positions:
             fid = str(p.fabric_node_id or "").strip()
             if not fid:
                 continue
-            from .topology_region_canvas import is_region_canvas_node_id
-
-            if not is_region_canvas_node_id(fid) and db.get(TopoFabricNode, fid) is None:
+            if not is_region_canvas_node_id(fid) and fid not in fabric_alive:
                 raise HTTPException(status_code=400, detail=f"fabric_node_not_found:{fid}")
             row = existing.get(fid)
             if row is None:
-                row = TopoViewNode(
-                    id=uuid4().hex,
-                    view_id=view.id,
-                    fabric_node_id=fid,
-                    x=float(p.x or 0),
-                    y=float(p.y or 0),
-                    label=str(p.label or "")[:256],
-                    locked=bool(p.locked),
-                    created_at=now,
-                    updated_at=now,
-                )
-                db.add(row)
-                existing[fid] = row
-                updated += 1
-            else:
-                if row.locked and bool(p.locked):
-                    skipped_locked += 1
+                # Child-region icons may be synthesized without a placement row; persist those.
+                # Fabric NEs must not bypass membership caps / freeze (MCP adds via /nodes).
+                row = add_missing_region_placement(db, view, fid, x=p.x, y=p.y)
+                if row is None:
+                    skipped_missing += 1
                     continue
-                row.x = float(p.x or 0)
-                row.y = float(p.y or 0)
-                if p.label is not None:
-                    row.label = str(p.label or "")[:256]
+                existing[fid] = row
+            # Locked rows stay put unless the client explicitly unlocks (locked=False).
+            if row.locked and p.locked is not False:
+                skipped_locked += 1
+                continue
+            row.x = float(p.x or 0)
+            row.y = float(p.y or 0)
+            if p.label is not None:
+                row.label = str(p.label or "")[:256]
+            if p.locked is not None:
                 row.locked = bool(p.locked)
-                row.updated_at = now
-                updated += 1
+            row.updated_at = now
+            updated += 1
 
     view.updated_at = now
     db.commit()
@@ -756,6 +807,7 @@ def patch_view_positions(
         matched=matched,
         updated=updated,
         skipped_locked=skipped_locked,
+        skipped_missing=skipped_missing,
     )
 
 
@@ -1353,42 +1405,48 @@ _LINE_STYLES = {"", "solid", "dashed", "dotted"}
 def patch_view_edge_style(
     db: Session, view_id: str, body: ViewEdgeStylePatch
 ) -> TopologyViewGraphOut:
+    from .topology_views_commit import normalize_edge_style_items
+
     view = _get_view_or_404(db, view_id)
-    eid = str(body.fabric_edge_id or "").strip()
-    if not eid or db.get(TopoFabricEdge, eid) is None:
-        raise HTTPException(status_code=404, detail="fabric_edge_not_found")
-    color = str(body.stroke_color or "").strip()
-    if color and not _HEX_COLOR_RE.match(color):
-        raise HTTPException(status_code=400, detail="invalid_stroke_color")
-    width = int(body.stroke_width or 0)
-    if width < 0 or width > 12:
-        raise HTTPException(status_code=400, detail="invalid_stroke_width")
-    style = str(body.line_style or "").strip().lower()
-    if style not in _LINE_STYLES:
-        raise HTTPException(status_code=400, detail="invalid_line_style")
+    items = normalize_edge_style_items(body)
+    if not items:
+        raise HTTPException(status_code=400, detail="fabric_edge_id_required")
     now = _utcnow()
-    row = (
-        db.query(TopoViewEdgeStyle)
-        .filter(TopoViewEdgeStyle.view_id == view.id, TopoViewEdgeStyle.fabric_edge_id == eid)
-        .one_or_none()
-    )
-    if row is None:
-        row = TopoViewEdgeStyle(
-            id=uuid4().hex,
-            view_id=view.id,
-            fabric_edge_id=eid,
-            stroke_color=color,
-            stroke_width=width,
-            line_style=style,
-            created_at=now,
-            updated_at=now,
+    for item in items:
+        eid = str(item.fabric_edge_id or "").strip()
+        if not eid or db.get(TopoFabricEdge, eid) is None:
+            raise HTTPException(status_code=404, detail="fabric_edge_not_found")
+        color = str(item.stroke_color or "").strip()
+        if color and not _HEX_COLOR_RE.match(color):
+            raise HTTPException(status_code=400, detail="invalid_stroke_color")
+        width = int(item.stroke_width or 0)
+        if width < 0 or width > 12:
+            raise HTTPException(status_code=400, detail="invalid_stroke_width")
+        style = str(item.line_style or "").strip().lower()
+        if style not in _LINE_STYLES:
+            raise HTTPException(status_code=400, detail="invalid_line_style")
+        row = (
+            db.query(TopoViewEdgeStyle)
+            .filter(TopoViewEdgeStyle.view_id == view.id, TopoViewEdgeStyle.fabric_edge_id == eid)
+            .one_or_none()
         )
-        db.add(row)
-    else:
-        row.stroke_color = color
-        row.stroke_width = width
-        row.line_style = style
-        row.updated_at = now
+        if row is None:
+            row = TopoViewEdgeStyle(
+                id=uuid4().hex,
+                view_id=view.id,
+                fabric_edge_id=eid,
+                stroke_color=color,
+                stroke_width=width,
+                line_style=style,
+                created_at=now,
+                updated_at=now,
+            )
+            db.add(row)
+        else:
+            row.stroke_color = color
+            row.stroke_width = width
+            row.line_style = style
+            row.updated_at = now
     view.updated_at = now
     db.commit()
     return get_view_graph(db, view.id)

packages/netx-topology-mcp/src/netx_topology_mcp/http_tools.py

@@ -1976,15 +1976,18 @@ def _update_topology_view_positions(args: dict[str, Any]) -> dict[str, Any]:
         fid = str(p.get("fabric_node_id") or "").strip()
         if not fid:
             continue
-        cleaned.append(
-            {
-                "fabric_node_id": fid,
-                "x": float(p.get("x") or 0),
-                "y": float(p.get("y") or 0),
-                "label": str(p.get("label") or ""),
-                "locked": bool(p.get("locked") or False),
-            }
-        )
+        row: dict[str, Any] = {
+            "fabric_node_id": fid,
+            "x": float(p.get("x") or 0),
+            "y": float(p.get("y") or 0),
+        }
+        # Omitted label/locked = keep server value (a UI rename or an existing lock).
+        # label "" clears the override; locked false explicitly unlocks.
+        if p.get("label") is not None:
+            row["label"] = str(p.get("label"))
+        if p.get("locked") is not None:
+            row["locked"] = bool(p.get("locked"))
+        cleaned.append(row)
     if not cleaned:
         return {"ok": False, "error": "positions_required"}
     parts: list[dict[str, Any]] = []
@@ -3727,8 +3730,14 @@ HTTP_MCP_TOOLS: list[dict[str, Any]] = [
                             "fabric_node_id": {"type": "string"},
                             "x": {"type": "number"},
                             "y": {"type": "number"},
-                            "label": {"type": "string"},
-                            "locked": {"type": "boolean"},
+                            "label": {
+                                "type": "string",
+                                "description": "Omit to keep the current label; \"\" clears a rename (follow device name).",
+                            },
+                            "locked": {
+                                "type": "boolean",
+                                "description": "Omit to keep the lock. Locked nodes are skipped unless locked=false (unlock + move).",
+                            },
                         },
                         "required": ["fabric_node_id"],
                         "additionalProperties": False,

packages/netx-topology-mcp/tests/test_mcp_topology.py

@@ -614,3 +614,24 @@ def test_analyze_topology_view_layout_single() -> None:
     assert "sparsity" in payload
     assert "verdict" in payload
     assert "total" in payload["verdict"]
+
+
+def test_update_positions_omits_label_and_locked_unless_given() -> None:
+    from netx_topology_mcp.http_tools import _update_topology_view_positions
+
+    with patch("netx_topology_mcp.http_tools.http_json") as mock_http:
+        mock_http.return_value = {"ok": True, "data": {"ok": True, "updated": 3}}
+        _update_topology_view_positions(
+            {
+                "view_id": "v1",
+                "positions": [
+                    {"fabric_node_id": "a", "x": 1, "y": 2},
+                    {"fabric_node_id": "b", "x": 3, "y": 4, "label": "", "locked": False},
+                    {"fabric_node_id": "c", "x": 5, "y": 6, "label": "Core-1", "locked": True},
+                ],
+            }
+        )
+    sent = mock_http.call_args[1]["body"]["positions"]
+    assert sent[0] == {"fabric_node_id": "a", "x": 1.0, "y": 2.0}
+    assert sent[1]["label"] == "" and sent[1]["locked"] is False
+    assert sent[2]["label"] == "Core-1" and sent[2]["locked"] is True

scripts/topology_clear_frozen_labels.py

@@ -0,0 +1,79 @@
+"""Clear view-node labels that merely freeze the current fabric name/ip.
+
+Default is dry-run. Pass --apply to write.
+
+A placement label is considered frozen when it equals the fabric node's current
+name or IP (case-insensitive, stripped). Clearing it restores follow-device-name
+behavior on the next graph read.
+"""
+
+from __future__ import annotations
+
+import argparse
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from sqlalchemy import or_
+
+from netx_api.db import SessionLocal
+from netx_api.models import TopoFabricNode, TopoViewNode
+
+
+def _norm(s: str | None) -> str:
+    return str(s or "").strip().casefold()
+
+
+def clear_frozen_labels(db, *, apply: bool) -> tuple[int, int]:
+    """Return (scanned_nonempty_labels, frozen_cleared). Caller commits/rolls back."""
+    rows = (
+        db.query(TopoViewNode, TopoFabricNode)
+        .outerjoin(TopoFabricNode, TopoFabricNode.id == TopoViewNode.fabric_node_id)
+        .filter(TopoViewNode.label != "")
+        .filter(or_(TopoViewNode.label.isnot(None)))
+        .all()
+    )
+    scanned = 0
+    cleared = 0
+    for vn, fn in rows:
+        scanned += 1
+        label = _norm(vn.label)
+        if not label or fn is None:
+            continue
+        if label not in {_norm(fn.name), _norm(fn.ip)}:
+            continue
+        cleared += 1
+        if apply:
+            vn.label = ""
+    return scanned, cleared
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--apply",
+        action="store_true",
+        help="Write changes (default: dry-run only)",
+    )
+    args = parser.parse_args(argv)
+
+    db = SessionLocal()
+    try:
+        scanned, cleared = clear_frozen_labels(db, apply=args.apply)
+        if args.apply:
+            db.commit()
+        else:
+            db.rollback()
+        mode = "apply" if args.apply else "dry-run"
+        print(f"mode={mode} scanned={scanned} frozen_labels={cleared}")
+        return 0
+    except Exception:
+        db.rollback()
+        raise
+    finally:
+        db.close()
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

tests/test_topology.py

@@ -27,12 +27,17 @@ from netx_api.models import (
     TopoViewEdgeStyle,
     TopoViewNode,
 )
+from netx_api.ne_crypto import encrypt_secret
 from netx_api.topology_schemas import (
     FabricDiscoverRequest,
     TopologyFolderCreate,
     TopologyPlaceholderCreate,
     TopologyViewCreate,
     TopologyViewUpdate,
+    ViewCommitEdgeCreate,
+    ViewCommitEdgePortEdit,
+    ViewCommitIn,
+    ViewEdgeStyleItem,
     ViewNodesAdd,
     ViewPopulateRequest,
     ViewPositionsPatch,
@@ -384,6 +389,388 @@ class FabricTopologyTests(unittest.TestCase):
             self.db.refresh(view)
         return view.id
 
+    def test_patch_manual_edge_ports(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne_a = ManagedNE(
+            id=f"ne-mp-a-{suffix}",
+            name=f"MPA-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.0.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        ne_b = ManagedNE(
+            id=f"ne-mp-b-{suffix}",
+            name=f"MPB-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.1.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add_all([ne_a, ne_b])
+        self.db.commit()
+        fa = svc.ensure_fabric_node_for_managed(self.db, ne_a)
+        fb = svc.ensure_fabric_node_for_managed(self.db, ne_b)
+        edge, _ = svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=fa.id,
+            b_node_id=fb.id,
+            a_port="gi0/1",
+            b_port="gi0/2",
+            source="manual",
+        )
+        self.db.commit()
+        assert edge is not None
+        updated = svc.patch_manual_edge_ports(
+            self.db, edge.id, a_port="Gi0/10", b_port="Gi0/20", commit=True
+        )
+        self.assertEqual(updated.a_port.lower(), "gi0/10")
+        self.assertEqual(updated.b_port.lower(), "gi0/20")
+        for ne in (ne_a, ne_b):
+            self.db.delete(ne)
+        self.db.commit()
+
+    def test_patch_non_manual_edge_ports_rejected(self) -> None:
+        from fastapi import HTTPException
+
+        suffix = uuid4().hex[:8]
+        ne_a = ManagedNE(
+            id=f"ne-nm-a-{suffix}",
+            name=f"NMA-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.2.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        ne_b = ManagedNE(
+            id=f"ne-nm-b-{suffix}",
+            name=f"NMB-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.3.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add_all([ne_a, ne_b])
+        self.db.commit()
+        fa = svc.ensure_fabric_node_for_managed(self.db, ne_a)
+        fb = svc.ensure_fabric_node_for_managed(self.db, ne_b)
+        edge, _ = svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=fa.id,
+            b_node_id=fb.id,
+            a_port="gi0/1",
+            b_port="gi0/2",
+            source="lldp",
+        )
+        self.db.commit()
+        assert edge is not None
+        with self.assertRaises(HTTPException) as ctx:
+            svc.patch_manual_edge_ports(
+                self.db, edge.id, a_port="gi0/9", b_port="gi0/8", commit=True
+            )
+        self.assertEqual(ctx.exception.status_code, 400)
+        self.assertEqual(ctx.exception.detail, "edge_not_manual")
+        for ne in (ne_a, ne_b):
+            self.db.delete(ne)
+        self.db.commit()
+
+    def test_patch_manual_edge_ports_conflict_409(self) -> None:
+        from fastapi import HTTPException
+
+        suffix = uuid4().hex[:8]
+        ne_a = ManagedNE(
+            id=f"ne-cf-a-{suffix}",
+            name=f"CFA-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.4.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        ne_b = ManagedNE(
+            id=f"ne-cf-b-{suffix}",
+            name=f"CFB-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.5.5.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add_all([ne_a, ne_b])
+        self.db.commit()
+        fa = svc.ensure_fabric_node_for_managed(self.db, ne_a)
+        fb = svc.ensure_fabric_node_for_managed(self.db, ne_b)
+        e1, _ = svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=fa.id,
+            b_node_id=fb.id,
+            a_port="gi0/1",
+            b_port="gi0/2",
+            source="manual",
+        )
+        e2, _ = svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=fa.id,
+            b_node_id=fb.id,
+            a_port="gi0/3",
+            b_port="gi0/4",
+            source="manual",
+        )
+        self.db.commit()
+        assert e1 is not None and e2 is not None
+        # Use the canonical A/B ports already stored on e1 (normalize may have swapped).
+        with self.assertRaises(HTTPException) as ctx:
+            svc.patch_manual_edge_ports(
+                self.db,
+                e2.id,
+                a_port=e1.a_port,
+                b_port=e1.b_port,
+                commit=True,
+            )
+        self.assertEqual(ctx.exception.status_code, 409)
+        self.assertEqual(ctx.exception.detail, "edge_port_conflict")
+        for ne in (ne_a, ne_b):
+            self.db.delete(ne)
+        self.db.commit()
+
+    def test_view_commit_atomic_rollback(self) -> None:
+        from fastapi import HTTPException
+
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-cmt-fail-{suffix}",
+            name=f"CFail-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.4.0.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"CFail-{suffix}")
+        fa = svc.ensure_fabric_node_for_managed(self.db, ne)
+        self.db.commit()
+        before_nodes = (
+            self.db.query(TopoViewNode).filter(TopoViewNode.view_id == view_id).count()
+        )
+        before_edges = self.db.query(TopoFabricEdge).count()
+        with self.assertRaises(HTTPException) as ctx:
+            svc.commit_view_changes(
+                self.db,
+                view_id,
+                ViewCommitIn(
+                    edge_creates=[
+                        ViewCommitEdgeCreate(
+                            client_id="local-loop",
+                            a_node_id=fa.id,
+                            b_node_id=fa.id,
+                            a_port="gi0/1",
+                            b_port="gi0/2",
+                        )
+                    ],
+                    node_adds=[fa.id],
+                    positions=[ViewNodeIn(fabric_node_id=fa.id, x=99, y=99)],
+                ),
+            )
+        detail = ctx.exception.detail
+        self.assertIsInstance(detail, dict)
+        self.assertEqual(detail.get("failed_step"), "edge_creates")
+        self.assertEqual(
+            self.db.query(TopoViewNode).filter(TopoViewNode.view_id == view_id).count(),
+            before_nodes,
+        )
+        self.assertEqual(self.db.query(TopoFabricEdge).count(), before_edges)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_view_commit_happy_path(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne_a = ManagedNE(
+            id=f"ne-cmt-a-{suffix}",
+            name=f"CA-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.4.1.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        ne_b = ManagedNE(
+            id=f"ne-cmt-b-{suffix}",
+            name=f"CB-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.4.2.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        ne_c = ManagedNE(
+            id=f"ne-cmt-c-{suffix}",
+            name=f"CC-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.4.3.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add_all([ne_a, ne_b, ne_c])
+        self.db.commit()
+        view_id = self._canvas(f"COk-{suffix}")
+        fa = svc.ensure_fabric_node_for_managed(self.db, ne_a)
+        fb = svc.ensure_fabric_node_for_managed(self.db, ne_b)
+        fc = svc.ensure_fabric_node_for_managed(self.db, ne_c)
+        self.db.commit()
+        svc.add_nodes_to_view(
+            self.db, view_id, ViewNodesAdd(fabric_node_ids=[fa.id, fb.id])
+        )
+        old_edge, _ = svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=fa.id,
+            b_node_id=fb.id,
+            a_port="gi0/9",
+            b_port="gi0/9",
+            source="manual",
+        )
+        self.db.commit()
+        assert old_edge is not None
+
+        out = svc.commit_view_changes(
+            self.db,
+            view_id,
+            ViewCommitIn(
+                edge_creates=[
+                    ViewCommitEdgeCreate(
+                        client_id="local-new",
+                        a_node_id=fa.id,
+                        b_node_id=fc.id,
+                        a_port="gi0/1",
+                        b_port="gi0/2",
+                    )
+                ],
+                edge_deletes=[old_edge.id],
+                node_adds=[fc.id],
+                node_removes=[fb.id],
+                positions=[
+                    ViewNodeIn(fabric_node_id=fa.id, x=11, y=22),
+                    ViewNodeIn(fabric_node_id=fc.id, x=33, y=44),
+                ],
+            ),
+        )
+        self.assertTrue(out.ok)
+        self.assertIn("local-new", out.edge_id_map)
+        self.assertIsNotNone(out.graph)
+        ids = {n.fabric_node_id for n in out.graph.nodes}
+        self.assertIn(fa.id, ids)
+        self.assertIn(fc.id, ids)
+        self.assertNotIn(fb.id, ids)
+        old_edge_id = str(old_edge.id)
+        self.db.expire_all()
+        self.assertIsNone(self.db.get(TopoFabricEdge, old_edge_id))
+        new_eid = out.edge_id_map["local-new"]
+        self.assertIsNotNone(self.db.get(TopoFabricEdge, new_eid))
+        pos_a = next(n for n in out.graph.nodes if n.fabric_node_id == fa.id)
+        self.assertEqual(float(pos_a.x), 11.0)
+        self.assertEqual(float(pos_a.y), 22.0)
+        # Node added in the same commit must also take its position (autoflush=False).
+        pos_c = next(n for n in out.graph.nodes if n.fabric_node_id == fc.id)
+        self.assertEqual((float(pos_c.x), float(pos_c.y)), (33.0, 44.0))
+        for ne in (ne_a, ne_b, ne_c):
+            self.db.delete(ne)
+        self.db.commit()
+
+    def _two_node_canvas(self, tag: str):
+        suffix = uuid4().hex[:8]
+        nes = [
+            ManagedNE(
+                id=f"ne-{tag}-{i}-{suffix}",
+                name=f"{tag.upper()}{i}-{suffix}",
+                vendor="Cisco",
+                device_type="cisco_ios",
+                ip_address=f"10.7.{i}.{(int(suffix[:2], 16) % 200) + 1}",
+            )
+            for i in (1, 2)
+        ]
+        self.db.add_all(nes)
+        self.db.commit()
+        view_id = self._canvas(f"{tag}-{suffix}")
+        fa, fb = (svc.ensure_fabric_node_for_managed(self.db, ne) for ne in nes)
+        self.db.commit()
+        svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(fabric_node_ids=[fa.id, fb.id]))
+        return view_id, fa, fb
+
+    def test_view_commit_skips_edits_on_edges_deleted_in_same_commit(self) -> None:
+        view_id, fa, fb = self._two_node_canvas("cdel")
+        edge, _ = svc.upsert_fabric_edge(
+            self.db, a_node_id=fa.id, b_node_id=fb.id, a_port="gi0/1", b_port="gi0/1", source="manual"
+        )
+        self.db.commit()
+        assert edge is not None
+        eid = str(edge.id)
+        out = svc.commit_view_changes(
+            self.db,
+            view_id,
+            ViewCommitIn(
+                edge_deletes=[eid],
+                edge_port_edits=[ViewCommitEdgePortEdit(id=eid, a_port="gi0/5", b_port="gi0/6")],
+                edge_styles=[ViewEdgeStyleItem(fabric_edge_id=eid, stroke_color="#ff0000")],
+            ),
+        )
+        self.assertTrue(out.ok)
+        self.db.expire_all()
+        self.assertIsNone(self.db.get(TopoFabricEdge, eid))
+
+    def test_view_commit_styles_new_edge_by_client_id(self) -> None:
+        view_id, fa, fb = self._two_node_canvas("csty")
+        out = svc.commit_view_changes(
+            self.db,
+            view_id,
+            ViewCommitIn(
+                edge_creates=[
+                    ViewCommitEdgeCreate(client_id="local:s1", a_node_id=fa.id, b_node_id=fb.id)
+                ],
+                edge_styles=[
+                    ViewEdgeStyleItem(fabric_edge_id="local:s1", stroke_color="#00ff00", stroke_width=3)
+                ],
+            ),
+        )
+        new_id = out.edge_id_map["local:s1"]
+        edge_out = next(e for e in out.graph.edges if e.id == new_id)
+        self.assertEqual(edge_out.stroke_color, "#00ff00")
+        self.assertEqual(edge_out.stroke_width, 3)
+
+    def test_positions_persist_child_region_icon_without_placement(self) -> None:
+        suffix = uuid4().hex[:8]
+        parent_id = self._region(f"Rg-{suffix}")
+        view = self._physical_view(parent_id)
+        child = svc.create_folder(
+            self.db, TopologyFolderCreate(name=f"Sub-{suffix}", kind="region", parent_id=parent_id)
+        )
+        nid = f"region:{child.id}"
+        # Legacy data: drop the icon's placement row so it is only synthesized.
+        self.db.query(TopoViewNode).filter(
+            TopoViewNode.view_id == view.id, TopoViewNode.fabric_node_id == nid
+        ).delete(synchronize_session=False)
+        self.db.commit()
+        g = svc.get_view_graph(self.db, view.id)
+        self.assertIn(nid, {n.fabric_node_id for n in g.nodes})
+
+        svc.patch_view_positions(
+            self.db, view.id, ViewPositionsPatch(positions=[ViewNodeIn(fabric_node_id=nid, x=321, y=123)])
+        )
+        g = svc.get_view_graph(self.db, view.id)
+        icon = next(n for n in g.nodes if n.fabric_node_id == nid)
+        self.assertEqual((icon.x, icon.y), (321.0, 123.0))
+
+        self.db.query(TopoViewNode).filter(
+            TopoViewNode.view_id == view.id, TopoViewNode.fabric_node_id == nid
+        ).delete(synchronize_session=False)
+        self.db.commit()
+        out = svc.commit_view_changes(
+            self.db, view.id, ViewCommitIn(positions=[ViewNodeIn(fabric_node_id=nid, x=55, y=66)])
+        )
+        icon = next(n for n in out.graph.nodes if n.fabric_node_id == nid)
+        self.assertEqual((icon.x, icon.y), (55.0, 66.0))
+        # Placement follows the folder name (no frozen label).
+        self.assertEqual(icon.label_override, "")
+
+    def test_positions_do_not_place_foreign_region_icon(self) -> None:
+        suffix = uuid4().hex[:8]
+        view_id = self._canvas(f"Rf-{suffix}")
+        other = svc.create_folder(self.db, TopologyFolderCreate(name=f"Other-{suffix}", kind="region"))
+        out = svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=f"region:{other.id}", x=1, y=1)],
+                return_graph=False,
+            ),
+        )
+        self.assertEqual(out.skipped_missing, 1)
+
     def test_view_crud_and_positions(self) -> None:
         suffix = uuid4().hex[:8]
         ne = ManagedNE(
@@ -417,6 +804,420 @@ class FabricTopologyTests(unittest.TestCase):
         self.db.delete(ne)
         self.db.commit()
 
+    def test_positions_preserve_lock_when_omitted(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-lock-{suffix}",
+            name=f"L-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.1.0.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"Lock-{suffix}")
+        graph = svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(managed_ne_ids=[ne.id]))
+        fid = graph.nodes[0].fabric_node_id
+        svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=500, y=500, locked=True)],
+                return_graph=False,
+            ),
+        )
+        # UI-style save: omit locked — must not move or unlock.
+        out = svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=10, y=10)],
+                return_graph=False,
+            ),
+        )
+        self.assertEqual(out.skipped_locked, 1)
+        self.assertEqual(out.updated, 0)
+        row = (
+            self.db.query(TopoViewNode)
+            .filter(TopoViewNode.view_id == view_id, TopoViewNode.fabric_node_id == fid)
+            .one()
+        )
+        self.assertTrue(row.locked)
+        self.assertEqual(float(row.x), 500.0)
+        self.assertEqual(float(row.y), 500.0)
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_positions_explicit_unlock_moves(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-ulock-{suffix}",
+            name=f"U-{suffix}",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.1.1.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"ULock-{suffix}")
+        graph = svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(managed_ne_ids=[ne.id]))
+        fid = graph.nodes[0].fabric_node_id
+        svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=500, y=500, locked=True)],
+                return_graph=False,
+            ),
+        )
+        out = svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=10, y=20, locked=False)],
+                return_graph=False,
+            ),
+        )
+        self.assertEqual(out.skipped_locked, 0)
+        self.assertEqual(out.updated, 1)
+        row = (
+            self.db.query(TopoViewNode)
+            .filter(TopoViewNode.view_id == view_id, TopoViewNode.fabric_node_id == fid)
+            .one()
+        )
+        self.assertFalse(row.locked)
+        self.assertEqual(float(row.x), 10.0)
+        self.assertEqual(float(row.y), 20.0)
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_positions_without_label_keeps_following_name(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-lbl-{suffix}",
+            name="OLD-NAME",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.2.0.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"Lbl-{suffix}")
+        graph = svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(managed_ne_ids=[ne.id]))
+        fid = graph.nodes[0].fabric_node_id
+        self.assertEqual(graph.nodes[0].label, "OLD-NAME")
+        self.assertEqual(graph.nodes[0].label_override, "")
+        # Save positions without label — must not freeze the device name.
+        svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=40, y=60)],
+                return_graph=False,
+            ),
+        )
+        fn = self.db.get(TopoFabricNode, fid)
+        assert fn is not None
+        fn.name = "NEW-NAME"
+        self.db.commit()
+        refreshed = svc.get_view_graph(self.db, view_id)
+        self.assertEqual(refreshed.nodes[0].label, "NEW-NAME")
+        self.assertEqual(refreshed.nodes[0].label_override, "")
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_label_override_survives_rename(self) -> None:
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-ov-{suffix}",
+            name="DEVICE-A",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.2.1.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"Ov-{suffix}")
+        graph = svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(managed_ne_ids=[ne.id]))
+        fid = graph.nodes[0].fabric_node_id
+        svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[
+                    ViewNodeIn(fabric_node_id=fid, x=1, y=2, label="CUSTOM"),
+                ],
+                return_graph=False,
+            ),
+        )
+        fn = self.db.get(TopoFabricNode, fid)
+        assert fn is not None
+        fn.name = "DEVICE-B"
+        self.db.commit()
+        refreshed = svc.get_view_graph(self.db, view_id)
+        self.assertEqual(refreshed.nodes[0].label, "CUSTOM")
+        self.assertEqual(refreshed.nodes[0].label_override, "CUSTOM")
+        # Clear override → follow device name again.
+        svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[ViewNodeIn(fabric_node_id=fid, x=1, y=2, label="")],
+                return_graph=False,
+            ),
+        )
+        cleared = svc.get_view_graph(self.db, view_id)
+        self.assertEqual(cleared.nodes[0].label, "DEVICE-B")
+        self.assertEqual(cleared.nodes[0].label_override, "")
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_clear_frozen_labels_script_dry_run_and_apply(self) -> None:
+        from scripts.topology_clear_frozen_labels import clear_frozen_labels
+
+        suffix = uuid4().hex[:8]
+        ne = ManagedNE(
+            id=f"ne-frz-{suffix}",
+            name="FROZEN-NAME",
+            vendor="Cisco",
+            device_type="cisco_ios",
+            ip_address=f"10.3.0.{(int(suffix[:2], 16) % 200) + 1}",
+        )
+        self.db.add(ne)
+        self.db.commit()
+        view_id = self._canvas(f"Frz-{suffix}")
+        graph = svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(managed_ne_ids=[ne.id]))
+        fid = graph.nodes[0].fabric_node_id
+        # Simulate a pre-T2 save that froze the device name into vn.label.
+        row = (
+            self.db.query(TopoViewNode)
+            .filter(TopoViewNode.view_id == view_id, TopoViewNode.fabric_node_id == fid)
+            .one()
+        )
+        row.label = "FROZEN-NAME"
+        self.db.commit()
+
+        scanned, cleared = clear_frozen_labels(self.db, apply=False)
+        self.assertGreaterEqual(scanned, 1)
+        self.assertGreaterEqual(cleared, 1)
+        self.db.refresh(row)
+        self.assertEqual(row.label, "FROZEN-NAME")
+
+        scanned2, cleared2 = clear_frozen_labels(self.db, apply=True)
+        self.db.commit()
+        self.assertEqual(cleared2, cleared)
+        self.db.refresh(row)
+        self.assertEqual(row.label, "")
+
+        scanned3, cleared3 = clear_frozen_labels(self.db, apply=False)
+        self.assertEqual(cleared3, 0)
+        self.assertGreaterEqual(scanned3, 0)
+
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.delete(ne)
+        self.db.commit()
+
+    def test_outside_peers_found_when_many_internal_edges(self) -> None:
+        """Internal edges must not consume the outside-peer scan budget."""
+        from netx_api.topology_views_graph import _outside_peers_for_view
+
+        suffix = uuid4().hex[:8]
+        nodes: list[TopoFabricNode] = []
+        for i in range(6):
+            ne = ManagedNE(
+                id=f"ne-op-{suffix}-{i}",
+                name=f"OP-{suffix}-{i}",
+                vendor="Cisco",
+                device_type="cisco_ios",
+                ip_address=f"10.8.{i}.{(int(suffix[:2], 16) % 200) + 1}",
+            )
+            self.db.add(ne)
+            self.db.flush()
+            nodes.append(svc.ensure_fabric_node_for_managed(self.db, ne))
+        outside = TopoFabricNode(
+            id=f"out-{suffix}",
+            name=f"OUT-{suffix}",
+            ip="10.8.99.1",
+        )
+        self.db.add(outside)
+        self.db.commit()
+        # Dense internal mesh among the first 5 nodes.
+        for i, a in enumerate(nodes[:5]):
+            for j, b in enumerate(nodes[:5]):
+                if i >= j:
+                    continue
+                svc.upsert_fabric_edge(
+                    self.db,
+                    a_node_id=a.id,
+                    b_node_id=b.id,
+                    a_port=f"gi0/{i}",
+                    b_port=f"gi0/{j}",
+                    source="manual",
+                )
+        # One external edge after the internal flood.
+        svc.upsert_fabric_edge(
+            self.db,
+            a_node_id=nodes[0].id,
+            b_node_id=outside.id,
+            a_port="gi0/99",
+            b_port="gi0/1",
+            source="manual",
+        )
+        self.db.commit()
+        view_id = self._canvas(f"OP-{suffix}")
+        view = self.db.get(TopoView, view_id)
+        assert view is not None
+        svc.add_nodes_to_view(
+            self.db,
+            view_id,
+            ViewNodesAdd(fabric_node_ids=[n.id for n in nodes[:5]]),
+        )
+        peers = _outside_peers_for_view(
+            self.db,
+            view,
+            member_ids={n.id for n in nodes[:5]},
+            layer="physical",
+            limit=50,
+            edge_scan_limit=10,  # would miss the peer if internals counted
+        )
+        peer_ids = {p["fabric_node_id"] for p in peers}
+        self.assertIn(outside.id, peer_ids)
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.commit()
+
+    def test_view_truncation_is_deterministic(self) -> None:
+        from unittest.mock import patch
+
+        from netx_api import topology_views_graph as vg
+
+        suffix = uuid4().hex[:8]
+        view_id = self._canvas(f"Trunc-{suffix}")
+        fids: list[str] = []
+        for i in range(5):
+            ne = ManagedNE(
+                id=f"ne-tr-{suffix}-{i}",
+                name=f"TR-{suffix}-{i}",
+                vendor="Cisco",
+                device_type="cisco_ios",
+                ip_address=f"10.9.{i}.{(int(suffix[:2], 16) % 200) + 1}",
+            )
+            self.db.add(ne)
+            self.db.flush()
+            fn = svc.ensure_fabric_node_for_managed(self.db, ne)
+            fids.append(fn.id)
+        self.db.commit()
+        svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(fabric_node_ids=fids))
+        with patch.object(vg, "VIEW_GRAPH_NODE_HARD_CAP", 3):
+            g1 = svc.get_view_graph(self.db, view_id)
+            g2 = svc.get_view_graph(self.db, view_id)
+        ids1 = [n.fabric_node_id for n in g1.nodes]
+        ids2 = [n.fabric_node_id for n in g2.nodes]
+        self.assertEqual(len(ids1), 3)
+        self.assertEqual(ids1, ids2)
+        self.assertTrue(g1.truncated)
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.commit()
+
+    def test_positions_batch_lookup_avoids_n_plus_one(self) -> None:
+        """200-node positions patch should issue a handful of SQL statements, not 200+."""
+        from sqlalchemy import event
+
+        suffix = uuid4().hex[:8]
+        view_id = self._canvas(f"N1-{suffix}")
+        fids: list[str] = []
+        for i in range(40):
+            ne = ManagedNE(
+                id=f"ne-n1-{suffix}-{i}",
+                name=f"N1-{suffix}-{i}",
+                vendor="Cisco",
+                device_type="cisco_ios",
+                ip_address=f"10.10.{i // 200}.{(i % 200) + 1}",
+            )
+            self.db.add(ne)
+            self.db.flush()
+            fids.append(svc.ensure_fabric_node_for_managed(self.db, ne).id)
+        self.db.commit()
+        svc.add_nodes_to_view(self.db, view_id, ViewNodesAdd(fabric_node_ids=fids))
+        statements: list[str] = []
+
+        def _count(conn, cursor, statement, parameters, context, executemany):  # noqa: ANN001
+            statements.append(str(statement))
+
+        bind = self.db.get_bind()
+        event.listen(bind, "before_cursor_execute", _count)
+        try:
+            svc.patch_view_positions(
+                self.db,
+                view_id,
+                ViewPositionsPatch(
+                    positions=[
+                        ViewNodeIn(fabric_node_id=fid, x=float(i), y=float(i))
+                        for i, fid in enumerate(fids)
+                    ],
+                    return_graph=False,
+                ),
+            )
+        finally:
+            event.remove(bind, "before_cursor_execute", _count)
+        # Cap well below one-query-per-node (40+).
+        self.assertLessEqual(len(statements), 15)
+        svc.delete_view(self.db, view_id, force=True)
+        self.db.commit()
+
+    def test_positions_respects_max_nodes(self) -> None:
+        """Positions must skip unknown placements instead of inserting past the cap."""
+        suffix = uuid4().hex[:8]
+        view_id = self._canvas(
+            f"Cap-{suffix}",
+            filter={"membership": {"max_nodes": 2, "mode": "manual"}},
+        )
+        nes = []
+        fids = []
+        for i in range(3):
+            ne = ManagedNE(
+                id=f"ne-cap-{suffix}-{i}",
+                name=f"CAP-{suffix}-{i}",
+                vendor="Cisco",
+                device_type="cisco_ios",
+                ip_address=f"10.11.{i}.{(int(suffix[:2], 16) % 200) + 1}",
+            )
+            self.db.add(ne)
+            self.db.flush()
+            nes.append(ne)
+            fids.append(svc.ensure_fabric_node_for_managed(self.db, ne).id)
+        self.db.commit()
+        svc.add_nodes_to_view(
+            self.db, view_id, ViewNodesAdd(fabric_node_ids=fids[:2], return_graph=False)
+        )
+        before = (
+            self.db.query(TopoViewNode).filter(TopoViewNode.view_id == view_id).count()
+        )
+        self.assertEqual(before, 2)
+        out = svc.patch_view_positions(
+            self.db,
+            view_id,
+            ViewPositionsPatch(
+                positions=[
+                    ViewNodeIn(fabric_node_id=fids[0], x=1, y=1),
+                    ViewNodeIn(fabric_node_id=fids[2], x=9, y=9),  # not on view
+                ],
+                return_graph=False,
+            ),
+        )
+        self.assertGreaterEqual(out.skipped_missing, 1)
+        after = (
+            self.db.query(TopoViewNode).filter(TopoViewNode.view_id == view_id).count()
+        )
+        self.assertEqual(after, 2)
+        svc.delete_view(self.db, view_id, force=True)
+        for ne in nes:
+            self.db.delete(ne)
+        self.db.commit()
+
     def test_create_topology_placeholder_on_view(self) -> None:
         suffix = uuid4().hex[:8]
         view_id = self._canvas(f"Rph-{suffix}")
@@ -1249,6 +2050,8 @@ class FabricTopologyTests(unittest.TestCase):
             vendor="Cisco",
             device_type="cisco_ios",
             ip_address=f"203.0.113.{(int(suffix[:2], 16) % 100) + 1}",
+            username="u",
+            password_enc=encrypt_secret("p"),
         )
         ne_b = ManagedNE(
             id=f"neb-{suffix}",
@@ -1256,6 +2059,8 @@ class FabricTopologyTests(unittest.TestCase):
             vendor="Cisco",
             device_type="cisco_ios",
             ip_address=f"203.0.113.{(int(suffix[2:4], 16) % 100) + 101}",
+            username="u",
+            password_enc=encrypt_secret("p"),
         )
         self.db.add(ne_a)
         self.db.add(ne_b)
@@ -1270,7 +2075,12 @@ class FabricTopologyTests(unittest.TestCase):
             "output": CISCO_LLDP_DETAIL,
             "commands": ["show lldp neighbors detail"],
         }
-        with patch("netx_api.topology_discover_scan.execute_managed_ne_commands", return_value=fake_exec):
+        # Background workers open SessionLocal(); point them at this in-memory engine.
+        with (
+            patch("netx_api.topology_discover_jobs.SessionLocal", self.Session),
+            patch("netx_api.topology_discover_scan.SessionLocal", self.Session),
+            patch("netx_api.topology_discover_scan.execute_managed_ne_commands", return_value=fake_exec),
+        ):
             job = svc.start_discover_job(
                 self.db,
                 FabricDiscoverRequest(scope="ne_ids", ne_ids=[ne_a.id], concurrency=1),
@@ -1422,6 +2232,8 @@ class FabricTopologyTests(unittest.TestCase):
             device_type="cisco_ios",
             ip_address=f"203.0.113.{(int(suffix[:2], 16) % 80) + 40}",
             source="manual",
+            username="u",
+            password_enc=encrypt_secret("p"),
         )
         self.db.add(ne_a)
         self.db.commit()
@@ -1442,7 +2254,11 @@ Management Addresses:
             "output": lldp_out,
             "commands": ["show lldp neighbors detail"],
         }
-        with patch("netx_api.topology_discover_scan.execute_managed_ne_commands", return_value=fake_exec):
+        with (
+            patch("netx_api.topology_discover_jobs.SessionLocal", self.Session),
+            patch("netx_api.topology_discover_scan.SessionLocal", self.Session),
+            patch("netx_api.topology_discover_scan.execute_managed_ne_commands", return_value=fake_exec),
+        ):
             job = svc.start_discover_job(
                 self.db,
                 FabricDiscoverRequest(
@@ -2283,7 +3099,9 @@ Management Addresses:
         self.db.add(orphan)
         self.db.commit()
 
-        stats = run_fabric_reconcile_once()
+        # run_fabric_reconcile_once opens SessionLocal(); bind it to this engine.
+        with patch("netx_api.fabric_reconcile_scheduler.SessionLocal", self.Session):
+            stats = run_fabric_reconcile_once()
         self.assertGreaterEqual(int(stats.get("purged_orphans") or 0), 1)
         self.db.expire_all()
         self.assertIsNone(self.db.get(TopoFabricNode, orphan_id))

tests/test_ume_topology_apply.py

@@ -345,20 +345,12 @@ class UmeFabricApplyTests(unittest.TestCase):
         edge.source = "ume"
         edge.attrs = {"sources": ["ume"], "ume_link_id": "link-1"}
         self.db.commit()
-        a = (
-            self.db.query(TopoFabricNode)
-            .filter(TopoFabricNode.ume_ne_id == "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
-            .one()
-        )
-        b = (
-            self.db.query(TopoFabricNode)
-            .filter(TopoFabricNode.ume_ne_id == "bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb")
-            .one()
-        )
+        # Ports are already assigned to the edge's canonical A/B order; pass the
+        # same node ids so _normalize_endpoints cannot swap ports onto the wrong ends.
         edge2, action = upsert_fabric_edge(
             self.db,
-            a_node_id=a.id,
-            b_node_id=b.id,
+            a_node_id=edge.a_node_id,
+            b_node_id=edge.b_node_id,
             a_port=rich_a,
             b_port=rich_b,
             source="lldp",

web/src/features/topology/components/TopologyCtxMenu.tsx

@@ -399,8 +399,10 @@ export function TopologyCtxMenu({
                       className="topo-ctx__style-input"
                       value={selectedEdgeData.source_port || ""}
                       placeholder="?"
+                      readOnly={String(selectedEdgeData.source || "").toLowerCase() !== "manual"}
                       disabled={
-                        Number(selectedEdgeData.member_count || 1) > 1 && !expandPhysicalLinks
+                        String(selectedEdgeData.source || "").toLowerCase() !== "manual" ||
+                        (Number(selectedEdgeData.member_count || 1) > 1 && !expandPhysicalLinks)
                       }
                       onFocus={() => onPushHistory()}
                       onChange={(e) =>
@@ -421,8 +423,10 @@ export function TopologyCtxMenu({
                       className="topo-ctx__style-input"
                       value={selectedEdgeData.target_port || ""}
                       placeholder="?"
+                      readOnly={String(selectedEdgeData.source || "").toLowerCase() !== "manual"}
                       disabled={
-                        Number(selectedEdgeData.member_count || 1) > 1 && !expandPhysicalLinks
+                        String(selectedEdgeData.source || "").toLowerCase() !== "manual" ||
+                        (Number(selectedEdgeData.member_count || 1) > 1 && !expandPhysicalLinks)
                       }
                       onFocus={() => onPushHistory()}
                       onChange={(e) =>

web/src/features/topology/components/TopologyPageView.tsx

@@ -0,0 +1,867 @@
+import type { CSSProperties } from "react";
+import { Suspense } from "react";
+import { Button } from "@heroui/react";
+import { TopologyDiscoverPanel } from "./TopologyDiscoverPanel";
+import { TopologyHexBrowser } from "./TopologyHexBrowser";
+import { TopologyToolbar } from "./TopologyToolbar";
+import { TopologyViewTools } from "./TopologyViewTools";
+import { TopologySidebar } from "./TopologySidebar";
+import { TopologyModals } from "./TopologyModals";
+import { TopologyCtxMenu } from "./TopologyCtxMenu";
+import type { TopologyPageViewModel } from "../lib/pageViewModel";
+import type { PaletteItem } from "../lib/pageTypes";
+import { canvasBgLuminance, canvasFloatChromeVars } from "../lib/treeUtils";
+import type { PlaceholderCreateDialogState } from "./modals/PlaceholderCreateDialog";
+
+
+type Props = {
+  v: TopologyPageViewModel;
+};
+
+export function TopologyPageView({ v }: Props) {
+  const {
+    TopologyReactFlowView,
+    activeRegion,
+    activeView,
+    addNeOpen,
+    addOutsidePeers,
+    addPaletteItems,
+    alarmByNodeId,
+    applyAlign,
+    applyWorldMut,
+    autoLayoutAfterDiscover,
+    breadcrumbFolders,
+    browseEntries,
+    canRedo,
+    canUndo,
+    canWriteTopology,
+    cancelDiscover,
+    canvasBg,
+    canvasGraphEmpty,
+    canvasGraphError,
+    canvasGraphErrorMsg,
+    canvasGraphLoading,
+    canvasGraphRefreshing,
+    canvasHits,
+    canvasMode,
+    canvasQuery,
+    canvasRef,
+    canvasZoom,
+    clearSelection,
+    closeConnectDetail,
+    closeCreateNeMode,
+    closeCtxMenu,
+    closeManagedForm,
+    closePlaceholder,
+    connectClickRef,
+    connectDetailRow,
+    connectTestSelectedFor,
+    connectTestSubmitting,
+    createNeModeOpen,
+    createRegionMut,
+    ctxMenu,
+    ctxMenuRef,
+    debouncedTreeNeQuery,
+    deleteFolderMut,
+    dirty,
+    discoverAutoAddUnmatched,
+    discoverError,
+    discoverOneFor,
+    discoverOpen,
+    discoverPct,
+    discoverProgress,
+    discoverProjectNeighbors,
+    discoverReport,
+    discoverResults,
+    discoverSelectedFor,
+    discoverSummary,
+    discovering,
+    displayEdges,
+    displayMenuRef,
+    displayOpts,
+    edgeDefaults,
+    edgeFlow,
+    edges,
+    expandPhysicalLinks,
+    expandedIds,
+    exporting,
+    findActiveIdx,
+    findBoxRef,
+    findOnCanvas,
+    findOpen,
+    fitCanvas,
+    focusEdge,
+    focusNode,
+    fullscreen,
+    goBackBrowse,
+    goCanvas,
+    goRegion,
+    goRoot,
+    goUmeWorldNav,
+    graphQuery,
+    graphTruncated,
+    hexBrowseRegion,
+    hideIp,
+    hidePorts,
+    hideVendor,
+    hotBrowseKey,
+    isValidConnection,
+    isWorldFlatCanvas,
+    jumpToTreeSearchHit,
+    keyword,
+    labelColors,
+    liveSync,
+    managedFormInitial,
+    managedFormOpen,
+    mapId,
+    markDirty,
+    newRootDialog,
+    nodes,
+    nodesRef,
+    onCanvasDragOver,
+    onCanvasDrop,
+    onConnect,
+    onConnectRetestSubmitted,
+    onManagedFormSaved,
+    onNodeClick,
+    onNodeDoubleClick,
+    onPaletteDragStart,
+    onSidebarResizeDown,
+    onTreeClearHotBrowseKey,
+    onTreeDeleteFolder,
+    onTreeDeleteMap,
+    onTreeHotBrowseKey,
+    onTreeToggleExpand,
+    openAlarmsFor,
+    openCreateNeAt,
+    openNeFor,
+    openPortTrafficForEdge,
+    openWebcrtFor,
+    outsidePeerNameById,
+    outsidePeerQuery,
+    outsidePeerSelectedIds,
+    outsidePeers,
+    outsidePeersAdding,
+    outsidePeersOpen,
+    outsidePeersVisible,
+    paletteAdding,
+    paletteLoading,
+    paletteSelectedKeys,
+    paletteSource,
+    paletteVisible,
+    patchSelectedEdgeStyle,
+    pendingFitRef,
+    pickCreateManaged,
+    pickCreatePlaceholder,
+    placeCtxMenu,
+    placeholderBusy,
+    placeholderDialog,
+    popHistory,
+    primaryViewOfFolder,
+    promptNewRegion,
+    promptNewSubRegion,
+    promptRenameMap,
+    promptRenameRegion,
+    purgePlaceholderById,
+    pushHistory,
+    redo,
+    regions,
+    removeEdgeById,
+    removeNodeById,
+    removeSelected,
+    removeStaleEdges,
+    renameMapMut,
+    renameRegionMut,
+    renameSelectedNode,
+    resetEdgeDefaults,
+    rfRef,
+    rootFolderId,
+    runConnectTestForNode,
+    runTopologyExport,
+    saveMut,
+    scaleBundleWidth,
+    scheduleFlatViewportRefresh,
+    searchHitIds,
+    selectedConnectableCount,
+    selectedDiscoverableCount,
+    selectedEdge,
+    selectedEdgeData,
+    selectedEdgeId,
+    selectedEdgeResolved,
+    selectedEdgeSourceNode,
+    selectedEdgeTargetNode,
+    selectedFolderId,
+    selectedNode,
+    selectedNodeIds,
+    selectedNodes,
+    setAddNeOpen,
+    setAutoLayoutAfterDiscover,
+    setCanvasBg,
+    setCanvasQuery,
+    setCanvasZoom,
+    setCtxMenu,
+    setDiscoverAutoAddUnmatched,
+    setDiscoverOpen,
+    setDiscoverProjectNeighbors,
+    setEdgeFlow,
+    setEdges,
+    setExpandPhysicalLinks,
+    setFindActiveIdx,
+    setFindOpen,
+    setHideIp,
+    setHidePorts,
+    setHideVendor,
+    setHotBrowseKey,
+    setKeyword,
+    setLabelColors,
+    setLiveSync,
+    setNewRootDialog,
+    setNodes,
+    setOutsidePeerQuery,
+    setOutsidePeerSelectedIds,
+    setOutsidePeersOpen,
+    setPaletteSelectedKeys,
+    setPaletteSource,
+    setPlaceholderDialog,
+    setScaleBundleWidth,
+    setSelectedFolderId,
+    setShowAlarmOverlay,
+    setShowConnectStatus,
+    setShowLevelColors,
+    setShowPlaceholderBadge,
+    setSidebarCollapsed,
+    setSnapToGrid,
+    setToolMode,
+    setTreeNeQuery,
+    setTreeSearchOpen,
+    setVendorColors,
+    setViewToolsToolbarSlot,
+    setWorldFocusFolderId,
+    showAlarmOverlay,
+    showConnectStatus,
+    showError,
+    showLevelColors,
+    showPlaceholderBadge,
+    showWorldScatter,
+    sidebarCollapsed,
+    sidebarResizing,
+    sidebarWidth,
+    snapToGrid,
+    staleEdgeIds,
+    submitNewRoot,
+    submitPlaceholder,
+    t,
+    titleText,
+    toggleFullscreen,
+    toolBehavior,
+    toolMode,
+    topoPageRef,
+    treeFailed,
+    treeLoading,
+    treeNeQuery,
+    treeNeSearchQuery,
+    treeQuery,
+    treeRoot,
+    treeSearchOpen,
+    treeSearchRef,
+    truncateBannerText,
+    truncateReason,
+    umeWorldHexModules,
+    undo,
+    updateEdgeDefault,
+    vendorColors,
+    viewToolsToolbarSlot,
+    worldDockMe,
+    worldNeedsApply,
+    worldScatter,
+    worldTotal,
+    worldTransformRef,
+    worldViewId,
+    worldVisualLod,
+  } = v;
+
+  return (
+    <div
+      ref={topoPageRef}
+      className={`topo-page${sidebarCollapsed ? " is-sidebar-collapsed" : ""}${
+        sidebarResizing ? " is-sidebar-resizing" : ""
+      }`}
+      style={
+        sidebarCollapsed
+          ? undefined
+          : ({ "--topo-sidebar-w": `${sidebarWidth}px` } as CSSProperties)
+      }
+    >
+      <TopologySidebar
+        collapsed={sidebarCollapsed}
+        resizing={sidebarResizing}
+        treeSearchRef={treeSearchRef}
+        treeNeQuery={treeNeQuery}
+        onTreeNeQueryChange={setTreeNeQuery}
+        treeSearchOpen={treeSearchOpen}
+        onTreeSearchOpen={setTreeSearchOpen}
+        debouncedTreeNeQuery={debouncedTreeNeQuery}
+        treeSearchFetching={treeNeSearchQuery.isFetching}
+        treeSearchItems={treeNeSearchQuery.data?.items || []}
+        treeSearchTotal={treeNeSearchQuery.data?.total || 0}
+        onJumpToSearchHit={jumpToTreeSearchHit}
+        promptNewRegion={promptNewRegion}
+        createRegionPending={createRegionMut.isPending}
+        onCollapse={() => setSidebarCollapsed(true)}
+        onExpand={() => setSidebarCollapsed(false)}
+        treeRoot={treeRoot}
+        treeLoading={treeLoading}
+        treeFailed={treeFailed}
+        treeError={treeQuery.error}
+        onTreeRetry={() => void treeQuery.refetch()}
+        regions={regions}
+        treeNav={{
+          treeRootId: String(treeRoot?.id || ""),
+          expandedIds,
+          mapId,
+          worldViewId,
+          selectedFolderId,
+          hotBrowseKey,
+          dirty,
+          onToggleExpand: onTreeToggleExpand,
+          onHotBrowseKey: onTreeHotBrowseKey,
+          onClearHotBrowseKey: onTreeClearHotBrowseKey,
+          onWorldFocusClear: () => setWorldFocusFolderId(""),
+          goUmeWorldNav,
+          goRegion,
+          goCanvas,
+          promptRenameRegion,
+          promptRenameMap,
+          renameRegionPending: renameRegionMut.isPending,
+          renameMapPending: renameMapMut.isPending,
+          onDeleteFolder: onTreeDeleteFolder,
+          deleteFolderPending: deleteFolderMut.isPending,
+          onDeleteMap: onTreeDeleteMap,
+        }}
+        onResizeDown={onSidebarResizeDown}
+      />
+
+      <main className="topo-main">
+        {canvasMode ? (
+          <TopologyToolbar
+            readOnly={!canWriteTopology}
+            breadcrumbFolders={breadcrumbFolders}
+            activeView={activeView}
+            activeRegion={activeRegion}
+            rootFolderId={rootFolderId}
+            dirty={dirty}
+            selectedNodes={selectedNodes}
+            selectedEdgeId={selectedEdgeId}
+            liveSync={liveSync}
+            onLiveSyncToggle={() => setLiveSync((v: boolean) => !v)}
+            isWorldFlatCanvas={isWorldFlatCanvas}
+            onAddNe={() => {
+              if (isWorldFlatCanvas) {
+                showError(t("topology.worldMapNoDirectNes"));
+                return;
+              }
+              setKeyword("");
+              setPaletteSelectedKeys([]);
+              setAddNeOpen(true);
+            }}
+            onCreateNe={(flowX, flowY) => {
+              if (isWorldFlatCanvas) {
+                showError(t("topology.worldMapNoDirectNes"));
+                return;
+              }
+              openCreateNeAt(flowX, flowY);
+            }}
+            nodes={nodes}
+            rfRef={rfRef}
+            onBackUp={goBackBrowse}
+            canUndo={canUndo}
+            onUndo={undo}
+            canRedo={canRedo}
+            onRedo={redo}
+            savePending={saveMut.isPending}
+            onSave={() => saveMut.mutate()}
+            onFit={fitCanvas}
+            exporting={exporting}
+            onExport={runTopologyExport}
+            mapId={mapId}
+            staleEdgeCount={staleEdgeIds.length}
+            onRemoveStale={removeStaleEdges}
+            toolMode={toolMode}
+            onToolModeChange={setToolMode}
+            onConnectClickReset={() => {
+              connectClickRef.current = null;
+            }}
+            fullscreen={fullscreen}
+            viewToolsToolbarSlotRef={setViewToolsToolbarSlot}
+            outsidePeerCount={outsidePeers.length}
+            onOpenOutsidePeers={() => {
+              setOutsidePeerQuery("");
+              setOutsidePeerSelectedIds([]);
+              setOutsidePeersOpen(true);
+            }}
+            goRoot={goRoot}
+            goRegion={goRegion}
+            primaryViewOfFolder={primaryViewOfFolder}
+          />
+        ) : null}
+
+        {discoverOpen ? (
+          <TopologyDiscoverPanel
+            discovering={discovering}
+            discoverProgress={discoverProgress}
+            discoverPct={discoverPct}
+            discoverReport={discoverReport}
+            discoverError={discoverError}
+            hasResults={discoverResults.length > 0 || Boolean(discoverReport)}
+            discoverSummary={discoverSummary}
+            onCancelDiscover={cancelDiscover}
+            onClose={() => setDiscoverOpen(false)}
+          />
+        ) : null}
+
+        {!canvasMode ? (
+          <TopologyHexBrowser
+            titleText={titleText}
+            breadcrumbFolders={breadcrumbFolders}
+            hexBrowseRegion={hexBrowseRegion}
+            umeWorldHexModules={umeWorldHexModules}
+            browseEntries={browseEntries}
+            regions={regions}
+            rootFolderId={rootFolderId}
+            selectedFolderId={selectedFolderId}
+            mapId={mapId}
+            hotBrowseKey={hotBrowseKey}
+            treeLoading={treeLoading}
+            treeFailed={treeFailed}
+            treeError={treeQuery.error}
+            createRegionPending={createRegionMut.isPending}
+            onTreeRetry={() => void treeQuery.refetch()}
+            onHotBrowseKey={setHotBrowseKey}
+            onClearHotBrowseKey={(key: string) => setHotBrowseKey((k: string) => (k === key ? "" : k))}
+            goRoot={goRoot}
+            goRegion={goRegion}
+            goUmeWorldNav={goUmeWorldNav}
+            goCanvas={goCanvas}
+            promptNewRegion={promptNewRegion}
+            promptNewSubRegion={promptNewSubRegion}
+            onSelectFolder={setSelectedFolderId}
+          />
+        ) : (
+          <div
+            className={`topo-canvas${fullscreen ? " is-fullscreen" : ""}${
+              toolMode === "pan" ? " is-pan-mode" : ""
+            }${canvasBgLuminance(canvasBg) > 0.55 ? " is-canvas-light" : ""}`}
+            ref={canvasRef}
+            style={
+              {
+                "--topo-canvas-bg": canvasBg,
+                "--topo-label-color": labelColors.name,
+                "--topo-edge-label-color": labelColors.edgeLabel,
+                "--topo-vendor-cisco": vendorColors.cisco,
+                "--topo-vendor-huawei": vendorColors.huawei,
+                "--topo-vendor-zte": vendorColors.zte,
+                "--topo-vendor-juniper": vendorColors.juniper,
+                "--topo-vendor-nokia": vendorColors.nokia,
+                "--topo-vendor-ericsson": vendorColors.ericsson,
+                "--topo-vendor-h3c": vendorColors.h3c,
+                "--topo-vendor-ruijie": vendorColors.ruijie,
+                "--topo-vendor-mikrotik": vendorColors.mikrotik,
+                "--topo-vendor-gray": vendorColors.gray,
+                ...canvasFloatChromeVars(canvasBg),
+              } as CSSProperties
+            }
+            onDragOver={onCanvasDragOver}
+            onDrop={onCanvasDrop}
+          >
+            {truncateBannerText ? (
+              <div className="topo-truncate-banner" role="status">
+                {truncateBannerText}
+              </div>
+            ) : null}
+            {!canWriteTopology && mapId ? (
+              <div className="topo-readonly-banner" role="status">
+                {t("topology.readOnlyBanner")}
+              </div>
+            ) : null}
+            <TopologyViewTools
+              fullscreen={fullscreen}
+              toolbarSlot={viewToolsToolbarSlot}
+              displayMenuRef={displayMenuRef}
+              findBoxRef={findBoxRef}
+              hideIp={hideIp}
+              onHideIpChange={setHideIp}
+              hideVendor={hideVendor}
+              onHideVendorChange={setHideVendor}
+              showPlaceholderBadge={showPlaceholderBadge}
+              onShowPlaceholderBadgeChange={setShowPlaceholderBadge}
+              showConnectStatus={showConnectStatus}
+              onShowConnectStatusChange={setShowConnectStatus}
+              showAlarmOverlay={showAlarmOverlay}
+              onShowAlarmOverlayChange={setShowAlarmOverlay}
+              showLevelColors={showLevelColors}
+              onShowLevelColorsChange={setShowLevelColors}
+              hidePorts={hidePorts}
+              onHidePortsChange={setHidePorts}
+              expandPhysicalLinks={expandPhysicalLinks}
+              onExpandPhysicalLinksChange={setExpandPhysicalLinks}
+              scaleBundleWidth={scaleBundleWidth}
+              onScaleBundleWidthChange={setScaleBundleWidth}
+              edgeFlow={edgeFlow}
+              onEdgeFlowChange={setEdgeFlow}
+              snapToGrid={snapToGrid}
+              onSnapToGridChange={setSnapToGrid}
+              autoLayoutAfterDiscover={autoLayoutAfterDiscover}
+              onAutoLayoutAfterDiscoverChange={setAutoLayoutAfterDiscover}
+              discoverAutoAddUnmatched={discoverAutoAddUnmatched}
+              onDiscoverAutoAddUnmatchedChange={setDiscoverAutoAddUnmatched}
+              discoverProjectNeighbors={discoverProjectNeighbors}
+              onDiscoverProjectNeighborsChange={setDiscoverProjectNeighbors}
+              canvasBg={canvasBg}
+              onCanvasBgChange={setCanvasBg}
+              labelColors={labelColors}
+              onLabelColorsChange={setLabelColors}
+              vendorColors={vendorColors}
+              onVendorColorsChange={setVendorColors}
+              edgeDefaults={edgeDefaults}
+              onUpdateEdgeDefault={updateEdgeDefault}
+              onResetEdgeDefaults={resetEdgeDefaults}
+              selectedNodeCount={selectedNodes.length}
+              onAlign={applyAlign}
+              mapId={mapId}
+              nodeCount={nodes.length}
+              canvasQuery={canvasQuery}
+              onCanvasQueryChange={setCanvasQuery}
+              findOpen={findOpen}
+              onFindOpenChange={setFindOpen}
+              findActiveIdx={findActiveIdx}
+              onFindActiveIdxChange={setFindActiveIdx}
+              canvasHits={canvasHits}
+              onFindOnCanvas={findOnCanvas}
+            />
+            {fullscreen ? (
+              <div className="topo-fs-toolbar" role="toolbar" aria-label={t("topology.toolModes")}>
+                {(
+                  [
+                    ["select", t("topology.toolSelect"), "V"],
+                    ["pan", t("topology.toolPan"), "H"],
+                    ["connect", t("topology.toolConnect"), "C"],
+                  ] as const
+                ).map(([mode, label, key]) => (
+                  <button
+                    key={mode}
+                    type="button"
+                    className={`topo-fs-toolbar__btn${toolMode === mode ? " is-active" : ""}`}
+                    title={`${label} (${key})`}
+                    aria-pressed={toolMode === mode}
+                    onClick={() => {
+                      setToolMode(mode);
+                      connectClickRef.current = null;
+                    }}
+                  >
+                    {label}
+                    <kbd>{key}</kbd>
+                  </button>
+                ))}
+                <button
+                  type="button"
+                  className="topo-fs-toolbar__btn"
+                  title={t("topology.fit")}
+                  onClick={() => fitCanvas()}
+                >
+                  {t("topology.fit")}
+                </button>
+                <button
+                  type="button"
+                  className="topo-fs-toolbar__btn"
+                  title={t("topology.exitFullscreen")}
+                  onClick={() => void toggleFullscreen()}
+                >
+                  {t("topology.exitFullscreen")}
+                </button>
+              </div>
+            ) : null}
+            {treeRoot ? (
+              <>
+                {isWorldFlatCanvas ? (
+                  <div className="topo-world-hud" role="status">
+                    <span>
+                      {t("topology.worldHud")
+                        .replace("{{total}}", String(worldTotal || worldScatter.length || 0))
+                        .replace("{{cached}}", String(nodes.length))
+                        .replace("{{zoom}}", canvasZoom.toFixed(3))
+                        .replace("{{lod}}", worldVisualLod)}
+                    </span>
+                    {graphTruncated ? (
+                      <span className="muted"> · {truncateReason || "truncated"}</span>
+                    ) : null}
+                  </div>
+                ) : null}
+                <Suspense
+                  fallback={
+                    <div className="topo-canvas__empty topo-canvas__status" role="status">
+                      <span className="topo-loading-spinner" aria-hidden="true" />
+                      <p>{t("topology.treeLoading")}</p>
+                    </div>
+                  }
+                >
+                  <TopologyReactFlowView
+                    displayOpts={displayOpts}
+                    alarmByNodeId={alarmByNodeId}
+                    nodes={nodes}
+                    setNodes={setNodes}
+                    edges={edges}
+                    setEdges={setEdges}
+                    displayEdges={displayEdges}
+                    searchHitIds={searchHitIds}
+                    isWorldFlatCanvas={isWorldFlatCanvas}
+                    worldVisualLod={worldVisualLod}
+                    toolBehavior={toolBehavior}
+                    toolMode={toolMode}
+                    snapToGrid={snapToGrid}
+                    canvasBg={canvasBg}
+                    worldScatter={worldScatter}
+                    showWorldScatter={showWorldScatter}
+                    fullscreen={fullscreen}
+                    connectHint={t("topology.connectHint")}
+                    fullscreenLabel={t("topology.fullscreen")}
+                    exitFullscreenLabel={t("topology.exitFullscreen")}
+                    worldTransform={worldTransformRef.current || graphQuery.data?.world_transform}
+                    nodesRef={nodesRef}
+                    rfRef={rfRef}
+                    pendingFitRef={pendingFitRef}
+                    markDirty={markDirty}
+                    pushHistory={pushHistory}
+                    popHistory={popHistory}
+                    onConnect={onConnect}
+                    isValidConnection={isValidConnection}
+                    onNodeClick={onNodeClick}
+                    onNodeDoubleClick={onNodeDoubleClick}
+                    focusEdge={focusEdge}
+                    focusNode={focusNode}
+                    clearSelection={clearSelection}
+                    setCtxMenu={setCtxMenu}
+                    placeCtxMenu={placeCtxMenu}
+                    selectedNodeIds={selectedNodeIds}
+                    closeCtxMenu={closeCtxMenu}
+                    setCanvasZoom={setCanvasZoom}
+                    scheduleFlatViewportRefresh={scheduleFlatViewportRefresh}
+                    toggleFullscreen={toggleFullscreen}
+                  />
+                </Suspense>
+              </>
+            ) : treeLoading ? (
+              <div className="topo-canvas__empty topo-canvas__status" role="status">
+                <span className="topo-loading-spinner" aria-hidden="true" />
+                <p>{t("topology.treeLoading")}</p>
+              </div>
+            ) : treeFailed ? (
+              <div className="topo-canvas__empty">
+                <p className="muted">{t("topology.treeLoadFailed")}</p>
+                <div className="topo-browser__empty-actions">
+                  <Button
+                    size="sm"
+                    variant="ghost"
+                    onPress={() => void treeQuery.refetch()}
+                  >
+                    {t("topology.treeRetry")}
+                  </Button>
+                  <Button
+                    size="sm"
+                    variant="secondary"
+                    onPress={promptNewRegion}
+                    isDisabled={createRegionMut.isPending}
+                  >
+                    {t("topology.newRegion")}
+                  </Button>
+                </div>
+              </div>
+            ) : (
+              <div className="topo-canvas__empty">
+                <p className="muted">{t("topology.emptyMaps")}</p>
+                <Button
+                  size="sm"
+                  variant="secondary"
+                  onPress={promptNewRegion}
+                  isDisabled={createRegionMut.isPending}
+                >
+                  {t("topology.newRegion")}
+                </Button>
+              </div>
+            )}
+            {treeRoot && canvasGraphError ? (
+              <div className="topo-canvas__overlay topo-canvas__overlay--error" role="alert">
+                <p className="topo-canvas__overlay-title">{t("topology.graphLoadFailed")}</p>
+                {canvasGraphErrorMsg ? (
+                  <p className="topo-canvas__overlay-hint muted">{canvasGraphErrorMsg}</p>
+                ) : null}
+                <div className="topo-browser__empty-actions">
+                  <Button
+                    size="sm"
+                    variant="ghost"
+                    onPress={() => void graphQuery.refetch()}
+                  >
+                    {t("topology.treeRetry")}
+                  </Button>
+                </div>
+              </div>
+            ) : null}
+            {treeRoot && canvasGraphLoading ? (
+              <div className="topo-canvas__overlay topo-canvas__overlay--loading" role="status">
+                <span className="topo-loading-spinner topo-loading-spinner--lg" aria-hidden="true" />
+                <p className="topo-canvas__overlay-title">{t("topology.graphLoading")}</p>
+              </div>
+            ) : null}
+            {treeRoot && canvasGraphEmpty ? (
+              <div
+                className={`topo-canvas__overlay topo-canvas__overlay--empty${
+                  worldNeedsApply ? " is-interactive" : ""
+                }`}
+                role="status"
+              >
+                <p className="topo-canvas__overlay-title">
+                  {worldNeedsApply ? t("topology.worldEmptyCoords") : t("topology.canvasEmpty")}
+                </p>
+                <p className="topo-canvas__overlay-hint">
+                  {worldNeedsApply
+                    ? t("topology.worldEmptyCoordsHint").replace("{{dock}}", String(worldDockMe))
+                    : t("topology.canvasEmptyHint")}
+                </p>
+                {worldNeedsApply ? (
+                  <div className="btn-row" style={{ marginTop: 10, justifyContent: "center" }}>
+                    <Button
+                      size="sm"
+                      variant="secondary"
+                      isDisabled={applyWorldMut.isPending}
+                      onPress={() => applyWorldMut.mutate()}
+                    >
+                      {applyWorldMut.isPending
+                        ? t("topology.worldApplying")
+                        : t("topology.worldApply")}
+                    </Button>
+                  </div>
+                ) : null}
+              </div>
+            ) : null}
+            {treeRoot && canvasGraphRefreshing ? (
+              <div className="topo-canvas__refresh" role="status" aria-live="polite">
+                <span className="topo-loading-spinner" aria-hidden="true" />
+                {t("topology.graphRefreshing")}
+              </div>
+            ) : null}
+          </div>
+        )}
+      </main>
+
+      <TopologyModals
+        canvasMode={canvasMode}
+        newRootDialog={newRootDialog}
+        onNewRootNameChange={(name) => setNewRootDialog({ name })}
+        onCloseNewRoot={() => setNewRootDialog(null)}
+        onSubmitNewRoot={submitNewRoot}
+        createRegionPending={createRegionMut.isPending}
+        createNeModeOpen={createNeModeOpen}
+        onCloseCreateNeMode={closeCreateNeMode}
+        onPickCreateManaged={pickCreateManaged}
+        onPickCreatePlaceholder={pickCreatePlaceholder}
+        placeholderDialog={placeholderDialog}
+        placeholderBusy={placeholderBusy}
+        onPlaceholderChange={(patch: Partial<PlaceholderCreateDialogState>) =>
+          setPlaceholderDialog((prev: PlaceholderCreateDialogState | null) =>
+            prev ? { ...prev, ...patch } : prev,
+          )
+        }
+        onClosePlaceholder={closePlaceholder}
+        onSubmitPlaceholder={submitPlaceholder}
+        managedFormOpen={managedFormOpen}
+        managedFormInitial={managedFormInitial}
+        onCloseManagedForm={closeManagedForm}
+        onManagedFormSaved={(item) => void onManagedFormSaved(item)}
+        connectDetailRow={connectDetailRow}
+        onCloseConnectDetail={closeConnectDetail}
+        onConnectRetestSubmitted={onConnectRetestSubmitted}
+        outsidePeersOpen={outsidePeersOpen}
+        outsidePeers={outsidePeers}
+        outsidePeersVisible={outsidePeersVisible}
+        outsidePeerQuery={outsidePeerQuery}
+        onOutsidePeerQueryChange={setOutsidePeerQuery}
+        outsidePeerSelectedIds={outsidePeerSelectedIds}
+        onOutsidePeerSelectedIdsChange={setOutsidePeerSelectedIds}
+        outsidePeerNameById={outsidePeerNameById}
+        outsidePeersAdding={outsidePeersAdding}
+        onCloseOutsidePeers={() => setOutsidePeersOpen(false)}
+        onAddOutsidePeers={addOutsidePeers}
+        addNeOpen={addNeOpen}
+        paletteSource={paletteSource}
+        onPaletteSourceChange={(source) => {
+          setPaletteSource(source);
+          setPaletteSelectedKeys([]);
+        }}
+        keyword={keyword}
+        onKeywordChange={(value) => {
+          setKeyword(value);
+          setPaletteSelectedKeys([]);
+        }}
+        paletteVisible={paletteVisible}
+        paletteSelectedKeys={paletteSelectedKeys}
+        onPaletteSelectedKeysChange={setPaletteSelectedKeys}
+        paletteLoading={paletteLoading}
+        paletteAdding={paletteAdding}
+        onCloseAddNe={() => setAddNeOpen(false)}
+        onPaletteDragStart={onPaletteDragStart}
+        onAddSelectedPalette={async () => {
+          const selected = (paletteVisible as PaletteItem[]).filter((item: PaletteItem) =>
+            paletteSelectedKeys.includes(item.key),
+          );
+          if (selected.length === 0) return;
+          const ok = await addPaletteItems(selected);
+          if (!ok) return;
+          setPaletteSelectedKeys([]);
+          setAddNeOpen(false);
+        }}
+      />
+
+      {ctxMenu ? (
+        <TopologyCtxMenu
+          ctxMenu={ctxMenu}
+          menuRef={ctxMenuRef}
+          portalTarget={canvasRef.current}
+          fullscreen={fullscreen}
+          selectedNodeCount={selectedNodes.length}
+          selectedNode={selectedNode}
+          selectedEdge={selectedEdge}
+          selectedEdgeData={selectedEdgeData}
+          selectedEdgeResolved={selectedEdgeResolved}
+          selectedEdgeSourceNode={selectedEdgeSourceNode || null}
+          selectedEdgeTargetNode={selectedEdgeTargetNode || null}
+          expandPhysicalLinks={expandPhysicalLinks}
+          discovering={discovering}
+          isWorldFlatCanvas={isWorldFlatCanvas}
+          createRegionPending={createRegionMut.isPending}
+          onClose={closeCtxMenu}
+          onToggleFullscreen={toggleFullscreen}
+          onRemoveSelected={removeSelected}
+          onDiscoverSelected={discoverSelectedFor}
+          onConnectTestSelected={connectTestSelectedFor}
+          selectedDiscoverableCount={selectedDiscoverableCount}
+          selectedConnectableCount={selectedConnectableCount}
+          onOpenCreateNe={openCreateNeAt}
+          onPromptNewSubRegion={promptNewSubRegion}
+          onRenameSelectedNode={renameSelectedNode}
+          onDiscoverOne={discoverOneFor}
+          onOpenWebcrt={openWebcrtFor}
+          onOpenNe={openNeFor}
+          onOpenAlarms={openAlarmsFor}
+          onConnectTest={runConnectTestForNode}
+          connectTestBusy={connectTestSubmitting}
+          onPurgePlaceholder={purgePlaceholderById}
+          onRemoveNode={removeNodeById}
+          onExpandPhysicalLinks={() => setExpandPhysicalLinks(true)}
+          onPushHistory={pushHistory}
+          onPatchSelectedEdgeStyle={patchSelectedEdgeStyle}
+          onOpenPortTraffic={openPortTrafficForEdge}
+          onRemoveEdge={removeEdgeById}
+        />
+      ) : null}
+    </div>
+  );
+}

web/src/features/topology/components/TopologyReactFlowView.tsx

@@ -1,4 +1,11 @@
-import { createContext, memo, useContext, type Dispatch, type SetStateAction } from "react";
+import {
+  createContext,
+  memo,
+  useContext,
+  useRef,
+  type Dispatch,
+  type SetStateAction,
+} from "react";
 import {
   ReactFlow,
   Background,
@@ -24,6 +31,7 @@ import {
 import "@xyflow/react/dist/style.css";
 import { WorldScatterLayer, type WorldScatterPoint } from "./WorldScatterLayer";
 import { ParallelEdge } from "./ParallelEdge";
+import { fitToNodes } from "../lib/fitNodes";
 import { isAggregateEdgeId } from "../lib/linkDisplay";
 import type { ToolMode, ToolModeBehavior } from "../lib/toolMode";
 import type { TopologyViewRole, TopologyWorldTransform } from "../../../types";
@@ -36,6 +44,13 @@ export { isPlaceholderSource };
 
 export type NeNodeData = {
   label: string;
+  /** Current label override to persist; "" clears override. */
+  label_override?: string;
+  /** Last server label_override; used to decide whether to send label on save. */
+  label_override_saved?: string;
+  /** Inventory / fabric display name (for restoring after clearing override). */
+  name?: string;
+  locked?: boolean;
   managed_ne_id: string;
   ume_ne_id: string;
   ne_ip: string;
@@ -215,6 +230,16 @@ const NeNode = memo(function NeNode({ id, data, selected }: NodeProps<Node<NeNod
           isConnectable={connectMode && !isRegion}
         />
         {!isRegion ? <RouterIcon /> : <RegionCanvasIcon />}
+        {data.locked ? (
+          <span className="topo-node__lock" title="Locked" aria-label="Locked">
+            <svg viewBox="0 0 24 24" width="10" height="10" aria-hidden="true">
+              <path
+                fill="currentColor"
+                d="M12 17a2 2 0 1 0 0-4 2 2 0 0 0 0 4zm6-6h-1V9a5 5 0 0 0-10 0v2H6a2 2 0 0 0-2 2v7a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-7a2 2 0 0 0-2-2zm-3 0H9V9a3 3 0 1 1 6 0v2z"
+              />
+            </svg>
+          </span>
+        ) : null}
         {showConnectStatus && !isRegion ? (
           <span className={`topo-node__conn topo-node__conn--${connect}`} aria-hidden />
         ) : null}
@@ -328,6 +353,8 @@ export type TopologyReactFlowViewProps = {
   pendingFitRef: { current: boolean };
   markDirty: () => void;
   pushHistory: () => void;
+  /** Drop the latest undo frame when a drag was cancelled / no real move. */
+  popHistory: () => void;
   onConnect: (connection: Connection) => void;
   isValidConnection: (connection: Connection | Edge) => boolean;
   onNodeClick: (e: React.MouseEvent, node: Node<NeNodeData>) => void;
@@ -376,6 +403,7 @@ export default function TopologyReactFlowView(props: TopologyReactFlowViewProps)
     pendingFitRef,
     markDirty,
     pushHistory,
+    popHistory,
     onConnect,
     isValidConnection,
     onNodeClick,
@@ -392,6 +420,24 @@ export default function TopologyReactFlowView(props: TopologyReactFlowViewProps)
     toggleFullscreen,
   } = props;
 
+  /** Pre-drag positions of every node being dragged (single node or a box selection). */
+  const dragStartRef = useRef<Map<string, { x: number; y: number }> | null>(null);
+  const beginDrag = (dragged: Node<NeNodeData>[]) => {
+    dragStartRef.current = new Map(dragged.map((n) => [n.id, { x: n.position.x, y: n.position.y }]));
+    pushHistory();
+  };
+  const endDrag = (dragged: Node<NeNodeData>[]) => {
+    const start = dragStartRef.current;
+    dragStartRef.current = null;
+    if (!start) return;
+    const moved = dragged.some((n) => {
+      const s0 = start.get(n.id);
+      return Boolean(s0) && (Math.abs(n.position.x - s0!.x) > 1 || Math.abs(n.position.y - s0!.y) > 1);
+    });
+    if (moved) markDirty();
+    else popHistory();
+  };
+
   return (
     <TopoDisplayContext.Provider value={displayOpts}>
       <TopoAlarmContext.Provider value={alarmByNodeId || emptyAlarmMap}>
@@ -439,13 +485,26 @@ export default function TopologyReactFlowView(props: TopologyReactFlowViewProps)
         multiSelectionKeyCode="Shift"
         snapToGrid={snapToGrid}
         snapGrid={SNAP_GRID}
-        onNodeDragStart={() => {
-          pushHistory();
-        }}
+        onNodeDragStart={(_e, _node, dragged) => beginDrag(dragged)}
+        onNodeDragStop={(_e, _node, dragged) => endDrag(dragged)}
+        // Dragging an existing box selection fires selection events, not node drag events.
+        onSelectionDragStart={(_e, dragged) => beginDrag(dragged)}
+        onSelectionDragStop={(_e, dragged) => endDrag(dragged)}
         onNodesChange={(changes: NodeChange<Node<NeNodeData>>[]) => {
-          if (changes.some((c) => c.type === "position" || c.type === "remove" || c.type === "add")) {
-            markDirty();
+          // Position changes alone (click / select jitter) must not mark dirty; pointer
+          // drags are settled in endDrag. Outside a drag, a real position change comes from
+          // keyboard arrows (xyflow a11y move) and is an edit.
+          let edited = changes.some((c) => c.type === "remove" || c.type === "add");
+          if (!edited && !dragStartRef.current) {
+            const before = new Map(nodes.map((n) => [n.id, n.position]));
+            edited = changes.some((c) => {
+              if (c.type !== "position" || c.dragging || !c.position) return false;
+              const p0 = before.get(c.id);
+              return Boolean(p0) && (p0!.x !== c.position.x || p0!.y !== c.position.y);
+            });
+            if (edited) pushHistory();
           }
+          if (edited) markDirty();
           setNodes((nds) => applyNodeChanges(changes, nds));
         }}
         onEdgesChange={(changes: EdgeChange<Edge>[]) => {
@@ -522,8 +581,8 @@ export default function TopologyReactFlowView(props: TopologyReactFlowViewProps)
               const bounds = isWorldFlatCanvas ? worldDisplayBounds(worldTransform) : null;
               if (bounds) {
                 inst.fitBounds(bounds, { padding: 0.12, duration: 0 });
-              } else if (nodesRef.current.length > 0) {
-                inst.fitView({ ...FIT_VIEW_OPTS, duration: 0 });
+              } else {
+                fitToNodes(inst, nodesRef.current, { padding: FIT_VIEW_OPTS.padding });
               }
               setCanvasZoom(inst.getZoom());
             });

web/src/features/topology/hooks/useTopologyCanvas.ts

@@ -27,6 +27,7 @@ import {
   worldVisualLodFromZoom,
 } from "../lib/treeUtils";
 import { mergeFlatWorldGraph } from "../lib/worldGraph";
+import { fitToNodes } from "../lib/fitNodes";
 import type { HistorySnap } from "../lib/pageTypes";
 
 export type UseTopologyCanvasOptions = {
@@ -62,6 +63,10 @@ export type UseTopologyCanvasOptions = {
   redoRef: React.MutableRefObject<HistorySnap[]>;
   pendingEdgeDeletesRef: React.MutableRefObject<Set<string>>;
   pendingEdgeCreatesRef: React.MutableRefObject<Set<string>>;
+  pendingEdgePortEditsRef?: React.MutableRefObject<Map<string, { a_port: string; b_port: string }>>;
+  pendingEdgeStyleRef?: React.MutableRefObject<
+    Map<string, { stroke_color: string; stroke_width: number; line_style: string }>
+  >;
   clearDirty: () => void;
   bumpHistory: () => void;
   showError: (msg: string) => void;
@@ -102,6 +107,8 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
     redoRef,
     pendingEdgeDeletesRef,
     pendingEdgeCreatesRef,
+    pendingEdgePortEditsRef,
+    pendingEdgeStyleRef,
     clearDirty,
     bumpHistory,
     showError,
@@ -288,7 +295,7 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
       ? worldDisplayBounds(worldTransformRef.current || graphQuery.data?.world_transform)
       : null;
     if (bounds) inst.fitBounds(bounds, { padding: 0.12, duration: 0 });
-    else inst.fitView({ ...FIT_VIEW_OPTS });
+    else fitToNodes(inst, nodesRef.current, { padding: FIT_VIEW_OPTS.padding });
     setCanvasZoom(inst.getZoom());
   }, [isWorldFlatCanvas, graphQuery.data?.world_transform]);
 
@@ -345,14 +352,17 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
     setEdges(rfEdges);
     appliedGraphFpRef.current = fp;
     appliedOverlayFpRef.current = overlayFingerprint(graphQuery.data);
+    // Full server overwrite (enter map or clean live sync): drop local edit queues/undo.
+    historyRef.current = [];
+    redoRef.current = [];
+    pendingEdgeDeletesRef.current = new Set();
+    pendingEdgeCreatesRef.current = new Set();
+    pendingEdgePortEditsRef?.current.clear();
+    pendingEdgeStyleRef?.current.clear();
+    clearDirty();
+    bumpHistory();
     if (entering) {
       appliedMapIdRef.current = mapId;
-      historyRef.current = [];
-      redoRef.current = [];
-      pendingEdgeDeletesRef.current = new Set();
-      pendingEdgeCreatesRef.current = new Set();
-      clearDirty();
-      bumpHistory();
       const hasScatter = (graphQuery.data.scatter?.length || 0) > 0;
       const hasWorld = Boolean(worldDisplayBounds(graphQuery.data.world_transform));
       pendingFitRef.current = nextNodes.length > 0 || hasScatter || hasWorld;
@@ -373,6 +383,8 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
     redoRef,
     pendingEdgeDeletesRef,
     pendingEdgeCreatesRef,
+    pendingEdgePortEditsRef,
+    pendingEdgeStyleRef,
   ]);
 
   useEffect(() => {
@@ -394,7 +406,7 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
       if (bounds) {
         inst.fitBounds(bounds, { padding: 0.12, duration: 0 });
       } else {
-        inst.fitView({ ...FIT_VIEW_OPTS, duration: 0 });
+        fitToNodes(inst, nodesRef.current, { padding: FIT_VIEW_OPTS.padding });
       }
       setCanvasZoom(inst.getZoom());
     };
@@ -509,12 +521,9 @@ export function useTopologyCanvas(opts: UseTopologyCanvasOptions) {
       }
 
       window.setTimeout(() => {
-        rfRef.current?.fitView({
-          nodes: [{ id: nodeId }],
-          padding: 0.45,
-          duration: 280,
-          includeHiddenNodes: true,
-        });
+        const inst = rfRef.current;
+        const target = nodesRef.current.filter((n) => n.id === nodeId);
+        if (inst) fitToNodes(inst, target, { padding: 0.45, duration: 280, minWidth: 600, minHeight: 360 });
       }, 30);
     },
     [focusNode, focusWorldAround, showError, t, setSearchHitIds, searchHitTimerRef],

web/src/features/topology/hooks/useTopologyCreateNe.ts

@@ -190,7 +190,6 @@ export function useTopologyCreateNe({
                 fabric_node_id: added.fabric_node_id,
                 x: at.flowX,
                 y: at.flowY,
-                label: added.label || added.name || item.name || "",
               },
             ]);
             graph = await fetchTopologyGraph(mapId);

web/src/features/topology/hooks/useTopologyDiscover.ts

@@ -47,6 +47,8 @@ export type UseTopologyDiscoverOptions = {
   appliedMapIdRef: React.MutableRefObject<string>;
   markDirty: () => void;
   clearDirty: () => void;
+  /** Prefer atomic /commit when provided (T6). */
+  commitCanvas?: () => Promise<unknown>;
   showOk: (msg: string) => void;
   showError: (msg: string) => void;
   t: (key: string) => string;
@@ -72,6 +74,7 @@ export function useTopologyDiscover(opts: UseTopologyDiscoverOptions) {
     appliedMapIdRef,
     markDirty,
     clearDirty,
+    commitCanvas,
     showOk,
     showError,
     t,
@@ -95,6 +98,10 @@ export function useTopologyDiscover(opts: UseTopologyDiscoverOptions) {
 
   const flushDirtyCanvas = useCallback(async () => {
     if (!mapId || !dirtyRef.current) return;
+    if (commitCanvas) {
+      await commitCanvas();
+      return;
+    }
     const createIds = [...pendingEdgeCreatesRef.current];
     for (const id of createIds) {
       const e = edges.find((x) => x.id === id);
@@ -136,6 +143,7 @@ export function useTopologyDiscover(opts: UseTopologyDiscoverOptions) {
     pendingEdgeCreatesRef,
     pendingEdgeDeletesRef,
     clearDirty,
+    commitCanvas,
   ]);
 
   const runDiscover = useCallback(

web/src/features/topology/hooks/useTopologyEdgeEditing.ts

@@ -0,0 +1,362 @@
+import { useCallback, useMemo } from "react";
+import type { Connection, Edge, Node } from "@xyflow/react";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import {
+  type EdgeDefaults,
+  type EdgeStyleData,
+  withEdgeVisual,
+} from "../lib/edgeStyle";
+import { isLocalPendingEdgeId, newLocalEdgeId } from "../lib/idUtils";
+import {
+  formatPortPairLabel,
+  isAggregateEdgeId,
+  physicalIdsForDisplayEdge,
+} from "../lib/linkDisplay";
+
+type PortEdit = { a_port: string; b_port: string };
+type StyleEdit = { stroke_color: string; stroke_width: number; line_style: string };
+
+type Args = {
+  canWriteTopology: boolean;
+  mapId: string;
+  nodes: Node<NeNodeData>[];
+  edges: Edge[];
+  displayEdges: Edge[];
+  selectedEdgeId: string | null;
+  selectedEdge: Edge | null;
+  edgeDefaults: EdgeDefaults;
+  setNodes: React.Dispatch<React.SetStateAction<Node<NeNodeData>[]>>;
+  setEdges: React.Dispatch<React.SetStateAction<Edge[]>>;
+  setSelectedEdgeId: React.Dispatch<React.SetStateAction<string | null>>;
+  connectClickRef: React.MutableRefObject<string | null>;
+  pendingEdgeCreatesRef: React.MutableRefObject<Set<string>>;
+  pendingEdgeDeletesRef: React.MutableRefObject<Set<string>>;
+  pendingEdgePortEditsRef: React.MutableRefObject<Map<string, PortEdit>>;
+  pendingEdgeStyleRef: React.MutableRefObject<Map<string, StyleEdit>>;
+  pushHistory: () => void;
+  markDirty: () => void;
+  closeCtxMenu: () => void;
+  showOk: (msg: string) => void;
+  t: (key: string) => string;
+};
+
+export function useTopologyEdgeEditing({
+  canWriteTopology,
+  mapId,
+  nodes,
+  edges,
+  displayEdges,
+  selectedEdgeId,
+  selectedEdge,
+  edgeDefaults,
+  setNodes,
+  setEdges,
+  setSelectedEdgeId,
+  connectClickRef,
+  pendingEdgeCreatesRef,
+  pendingEdgeDeletesRef,
+  pendingEdgePortEditsRef,
+  pendingEdgeStyleRef,
+  pushHistory,
+  markDirty,
+  closeCtxMenu,
+  showOk,
+  t,
+}: Args) {
+  const isValidConnection = useCallback(
+    (connection: Connection | Edge) => {
+      const source = String(connection.source || "");
+      const target = String(connection.target || "");
+      if (!source || !target || source === target) return false;
+      return !edges.some(
+        (e) =>
+          (e.source === source && e.target === target) ||
+          (e.source === target && e.target === source),
+      );
+    },
+    [edges],
+  );
+
+  const onConnect = useCallback(
+    (connection: Connection) => {
+      if (!canWriteTopology || !mapId || !isValidConnection(connection)) return;
+      const source = String(connection.source || "");
+      const target = String(connection.target || "");
+      if (!source || !target) return;
+      pushHistory();
+      connectClickRef.current = null;
+      const id = newLocalEdgeId();
+      const data: EdgeStyleData = {
+        source: "manual",
+        source_port: "",
+        target_port: "",
+        stroke_color: "",
+        stroke_width: 0,
+        line_style: "",
+        discovered_at: null,
+      };
+      const edge = withEdgeVisual(
+        {
+          id,
+          source,
+          target,
+          // Center anchors only — omit handle ids so attach matches discovered edges after Save.
+          sourceHandle: null,
+          targetHandle: null,
+          type: "straight",
+          animated: false,
+          data,
+        },
+        edgeDefaults,
+      );
+      pendingEdgeCreatesRef.current.add(id);
+      setEdges((es) => [...es, edge]);
+      markDirty();
+    },
+    [
+      mapId,
+      isValidConnection,
+      pushHistory,
+      edgeDefaults,
+      setEdges,
+      markDirty,
+      canWriteTopology,
+      connectClickRef,
+      pendingEdgeCreatesRef,
+    ],
+  );
+
+  const patchSelectedEdgeStyle = useCallback(
+    (
+      patch: Partial<
+        Pick<EdgeStyleData, "stroke_color" | "stroke_width" | "line_style" | "source_port" | "target_port">
+      >,
+      opts?: { skipHistory?: boolean },
+    ) => {
+      if (!selectedEdgeId || !mapId) return;
+      const display = displayEdges.find((e) => e.id === selectedEdgeId) || selectedEdge;
+      const targetIds = physicalIdsForDisplayEdge(display, edges);
+      if (!targetIds.length) return;
+      // Port edits only make sense on a single physical manual link.
+      if (
+        (isAggregateEdgeId(selectedEdgeId) || targetIds.length > 1) &&
+        (patch.source_port !== undefined || patch.target_port !== undefined)
+      ) {
+        return;
+      }
+      if (!opts?.skipHistory) pushHistory();
+      setEdges((eds) =>
+        eds.map((e) => {
+          if (!targetIds.includes(e.id)) return e;
+          const prev = (e.data || {}) as EdgeStyleData;
+          const data: EdgeStyleData = {
+            ...prev,
+            stroke_color: patch.stroke_color !== undefined ? patch.stroke_color : prev.stroke_color || "",
+            stroke_width:
+              patch.stroke_width !== undefined ? Number(patch.stroke_width || 0) : Number(prev.stroke_width || 0),
+            line_style: patch.line_style !== undefined ? patch.line_style : prev.line_style || "",
+            source_port: patch.source_port !== undefined ? patch.source_port : prev.source_port || "",
+            target_port: patch.target_port !== undefined ? patch.target_port : prev.target_port || "",
+          };
+          const portLabel = formatPortPairLabel(
+            data.source_port || "",
+            data.target_port || "",
+            data.display_label,
+          );
+          return withEdgeVisual({ ...e, data, label: portLabel || undefined }, edgeDefaults);
+        }),
+      );
+      markDirty();
+      for (const fabricEdgeId of targetIds) {
+        const edge = edges.find((e) => e.id === fabricEdgeId);
+        const prev = (edge?.data || {}) as EdgeStyleData;
+        const nextStyle = {
+          stroke_color: patch.stroke_color !== undefined ? patch.stroke_color : prev.stroke_color || "",
+          stroke_width:
+            patch.stroke_width !== undefined ? Number(patch.stroke_width || 0) : Number(prev.stroke_width || 0),
+          line_style: patch.line_style !== undefined ? patch.line_style : prev.line_style || "",
+        };
+        if (
+          patch.stroke_color !== undefined ||
+          patch.stroke_width !== undefined ||
+          patch.line_style !== undefined
+        ) {
+          pendingEdgeStyleRef.current.set(fabricEdgeId, nextStyle);
+        }
+        if (patch.source_port !== undefined || patch.target_port !== undefined) {
+          const src = String(prev.source || "").toLowerCase();
+          // New local manual edges are saved via edge_creates; only queue port edits for saved edges.
+          if (src === "manual" && !pendingEdgeCreatesRef.current.has(fabricEdgeId) && !isLocalPendingEdgeId(fabricEdgeId)) {
+            pendingEdgePortEditsRef.current.set(fabricEdgeId, {
+              a_port: patch.source_port !== undefined ? patch.source_port : prev.source_port || "",
+              b_port: patch.target_port !== undefined ? patch.target_port : prev.target_port || "",
+            });
+          }
+        }
+      }
+    },
+    [
+      selectedEdgeId,
+      selectedEdge,
+      mapId,
+      edges,
+      displayEdges,
+      setEdges,
+      pushHistory,
+      edgeDefaults,
+      markDirty,
+      pendingEdgeStyleRef,
+      pendingEdgePortEditsRef,
+      pendingEdgeCreatesRef,
+    ],
+  );
+
+  const queueDeleteEdges = useCallback(
+    (
+      edgeIds: string[],
+      opts?: { confirmKey?: string; okKey?: string; skipConfirm?: boolean },
+    ) => {
+      if (!edgeIds.length) return false;
+      if (!opts?.skipConfirm) {
+        const confirmMsg = t(opts?.confirmKey || "topology.deleteEdgeConfirm");
+        if (!window.confirm(confirmMsg)) return false;
+      }
+      pushHistory();
+      for (const id of edgeIds) {
+        if (pendingEdgeCreatesRef.current.has(id) || isLocalPendingEdgeId(id)) {
+          pendingEdgeCreatesRef.current.delete(id);
+        } else {
+          pendingEdgeDeletesRef.current.add(id);
+        }
+      }
+      const idSet = new Set(edgeIds);
+      setEdges((es) => es.filter((e) => !idSet.has(e.id)));
+      setSelectedEdgeId((cur) => (cur && idSet.has(cur) ? null : cur));
+      markDirty();
+      showOk(
+        t(opts?.okKey || "topology.edgeDeleted").replace("{{count}}", String(edgeIds.length)),
+      );
+      return true;
+    },
+    [pushHistory, setEdges, setSelectedEdgeId, markDirty, showOk, t, pendingEdgeCreatesRef, pendingEdgeDeletesRef],
+  );
+
+  const removeSelected = useCallback(() => {
+    if (!mapId) return;
+    const nodeIds = nodes.filter((n) => n.selected).map((n) => n.id);
+    const selectedDisplay = displayEdges.filter((e) => e.selected);
+    const edgeIds = new Set<string>();
+    for (const de of selectedDisplay) {
+      for (const id of physicalIdsForDisplayEdge(de, edges)) edgeIds.add(id);
+    }
+    for (const e of edges) {
+      if (e.selected) edgeIds.add(e.id);
+    }
+    if (!nodeIds.length && !edgeIds.size) return;
+
+    if (nodeIds.length && edgeIds.size) {
+      const msg = t("topology.deleteSelectionConfirm")
+        .replace("{{nodes}}", String(nodeIds.length))
+        .replace("{{edges}}", String(edgeIds.size));
+      if (!window.confirm(msg)) return;
+      pushHistory();
+      const nodeSet = new Set(nodeIds);
+      for (const id of edgeIds) {
+        if (pendingEdgeCreatesRef.current.has(id) || isLocalPendingEdgeId(id)) {
+          pendingEdgeCreatesRef.current.delete(id);
+        } else {
+          pendingEdgeDeletesRef.current.add(id);
+        }
+      }
+      setNodes((ns) => ns.filter((n) => !nodeSet.has(n.id)));
+      setEdges((es) =>
+        es.filter(
+          (e) =>
+            !edgeIds.has(e.id) && !nodeSet.has(e.source) && !nodeSet.has(e.target),
+        ),
+      );
+      setSelectedEdgeId(null);
+      markDirty();
+      showOk(
+        t("topology.selectionDeleted")
+          .replace("{{nodes}}", String(nodeIds.length))
+          .replace("{{edges}}", String(edgeIds.size)),
+      );
+      return;
+    }
+
+    if (!nodeIds.length && edgeIds.size) {
+      queueDeleteEdges([...edgeIds]);
+      return;
+    }
+
+    pushHistory();
+    const nodeSet = new Set(nodeIds);
+    setNodes((ns) => ns.filter((n) => !nodeSet.has(n.id)));
+    // Drop incident edges from the canvas only — do not queue Fabric deletes.
+    setEdges((es) => {
+      const next = es.filter((e) => !nodeSet.has(e.source) && !nodeSet.has(e.target));
+      for (const e of es) {
+        if (next.some((x) => x.id === e.id)) continue;
+        pendingEdgeCreatesRef.current.delete(e.id);
+      }
+      return next;
+    });
+    setSelectedEdgeId(null);
+    markDirty();
+  }, [
+    mapId,
+    nodes,
+    edges,
+    displayEdges,
+    setNodes,
+    setEdges,
+    setSelectedEdgeId,
+    pushHistory,
+    markDirty,
+    showOk,
+    queueDeleteEdges,
+    t,
+    pendingEdgeCreatesRef,
+    pendingEdgeDeletesRef,
+  ]);
+
+  const removeEdgeById = useCallback(
+    (edgeId: string) => {
+      const display = displayEdges.find((e) => e.id === edgeId);
+      const ids = physicalIdsForDisplayEdge(display, edges);
+      const list = ids.length ? ids : [edgeId];
+      queueDeleteEdges(list);
+      closeCtxMenu();
+    },
+    [displayEdges, edges, queueDeleteEdges, closeCtxMenu],
+  );
+
+  const staleEdgeIds = useMemo(() => {
+    return edges
+      .filter((e) => {
+        const src = String((e.data as EdgeStyleData | undefined)?.source || "");
+        return src === "stale";
+      })
+      .map((e) => e.id);
+  }, [edges]);
+
+  const removeStaleEdges = useCallback(() => {
+    if (!staleEdgeIds.length) return;
+    queueDeleteEdges(staleEdgeIds, {
+      confirmKey: "topology.removeStaleHint",
+      okKey: "topology.staleRemoved",
+    });
+  }, [staleEdgeIds, queueDeleteEdges]);
+
+  return {
+    isValidConnection,
+    onConnect,
+    patchSelectedEdgeStyle,
+    queueDeleteEdges,
+    removeSelected,
+    removeEdgeById,
+    staleEdgeIds,
+    removeStaleEdges,
+  };
+}

web/src/features/topology/hooks/useTopologyExport.ts

@@ -0,0 +1,124 @@
+import { useCallback, useMemo, useState } from "react";
+import type { Edge, Node } from "@xyflow/react";
+import type { TopologyTreeFolderItem, TopologyTreeViewItem, TopologyViewGraph, TopologyViewItem } from "../../../types";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import type { LabelColors, VendorColors } from "../lib/displayPrefs";
+import { buildExportGraph, exportTopologySvg, exportTopologyXml } from "../lib/exportTopology";
+import { regionDisplayName } from "../lib/treeUtils";
+
+type Args = {
+  canvasMode: boolean;
+  isWorldFlatCanvas: boolean;
+  activeLeafName: string;
+  activeRegion: TopologyTreeFolderItem | null;
+  activeView: TopologyTreeViewItem | null;
+  graphQueryData?: TopologyViewGraph;
+  nodes: Node<NeNodeData>[];
+  edges: Edge[];
+  displayEdges: Edge[];
+  labelColors: LabelColors;
+  vendorColors: VendorColors;
+  hideIp: boolean;
+  hideVendor: boolean;
+  showOk: (msg: string) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+};
+
+export function useTopologyExport({
+  canvasMode,
+  isWorldFlatCanvas,
+  activeLeafName,
+  activeRegion,
+  activeView,
+  graphQueryData,
+  nodes,
+  edges,
+  displayEdges,
+  labelColors,
+  vendorColors,
+  hideIp,
+  hideVendor,
+  showOk,
+  showError,
+  t,
+}: Args) {
+  const [exporting, setExporting] = useState(false);
+
+  const runTopologyExport = useCallback(
+    async (format: "svg" | "xml") => {
+      const view: TopologyViewItem | undefined =
+        graphQueryData?.view ??
+        (activeView
+          ? {
+              id: activeView.id,
+              name: activeView.name,
+              remark: "",
+              node_count: activeView.node_count,
+              kind: activeView.kind,
+              role: activeView.role,
+              sort_order: activeView.sort_order,
+            }
+          : undefined);
+      if (!view) {
+        showError(t("topology.selectMap"));
+        return;
+      }
+      if (format !== "xml" && nodes.length === 0 && !isWorldFlatCanvas) {
+        showError(t("topology.exportEmpty"));
+        return;
+      }
+      setExporting(true);
+      const filenameBase = activeLeafName || view.name || "topology";
+      try {
+        if (format === "svg") {
+          await exportTopologySvg(
+            nodes,
+            displayEdges,
+            filenameBase,
+            {
+              labelColor: labelColors.name,
+              edgeLabelColor: labelColors.edgeLabel,
+              vendorColors,
+              hideIp,
+              hideVendor,
+            },
+            filenameBase,
+          );
+          showOk(t("topology.exportedSvg"));
+        } else {
+          exportTopologyXml(buildExportGraph(view, nodes, edges, graphQueryData), filenameBase);
+          showOk(t("topology.exportedXml"));
+        }
+      } catch (err) {
+        showError(t("topology.exportFailed").replace("{{detail}}", String(err)));
+      } finally {
+        setExporting(false);
+      }
+    },
+    [
+      activeView,
+      graphQueryData,
+      nodes,
+      edges,
+      displayEdges,
+      isWorldFlatCanvas,
+      activeLeafName,
+      labelColors,
+      vendorColors,
+      hideIp,
+      hideVendor,
+      showError,
+      showOk,
+      t,
+    ],
+  );
+
+  const titleText = useMemo(() => {
+    if (canvasMode) return activeLeafName || t("topology.selectMap");
+    if (activeRegion) return regionDisplayName(activeRegion, t);
+    return t("topology.rootName");
+  }, [canvasMode, activeLeafName, activeRegion, t]);
+
+  return { exporting, runTopologyExport, titleText };
+}

web/src/features/topology/hooks/useTopologyFind.ts

@@ -0,0 +1,269 @@
+import { useCallback, useEffect, useMemo, useRef } from "react";
+import type { Edge, Node, ReactFlowInstance } from "@xyflow/react";
+import type { FabricNodeSearchHit, TopologyTreeFolderItem } from "../../../types";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import { WORLD_MAP_ENABLED } from "../lib/constants";
+import { nodeMatchesQuery } from "../lib/searchUtils";
+import { findViewInRegion, isWorldFlatViewName } from "../lib/treeUtils";
+
+type Args = {
+  mapId: string;
+  canvasMode: boolean;
+  nodes: Node<NeNodeData>[];
+  regions: TopologyTreeFolderItem[];
+  pendingHighlightNe: string;
+  graphQueryData: unknown;
+  canvasQuery: string;
+  setCanvasQuery: React.Dispatch<React.SetStateAction<string>>;
+  setSearchHitIds: React.Dispatch<React.SetStateAction<string[]>>;
+  findOpen: boolean;
+  setFindOpen: React.Dispatch<React.SetStateAction<boolean>>;
+  findActiveIdx: number;
+  setFindActiveIdx: React.Dispatch<React.SetStateAction<number>>;
+  findBoxRef: React.MutableRefObject<HTMLDivElement | null>;
+  displayMenuRef: React.MutableRefObject<HTMLDetailsElement | null>;
+  isWorldFlatCanvasRef: React.MutableRefObject<boolean>;
+  rfRef: React.MutableRefObject<ReactFlowInstance<Node<NeNodeData>, Edge> | null>;
+  locateNode: (id: string, world?: { worldX?: number; worldY?: number }) => void;
+  confirmDiscardIfDirty: () => boolean;
+  setMapId: (id: string) => void;
+  setSelectedFolderId: (id: string) => void;
+  setExpandedIds: React.Dispatch<React.SetStateAction<Record<string, boolean>>>;
+  setPendingHighlightNe: (id: string) => void;
+  setTreeNeQuery: (q: string) => void;
+  setDebouncedTreeNeQuery: (q: string) => void;
+  setTreeSearchOpen: (open: boolean) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+};
+
+export function useTopologyFind({
+  mapId,
+  canvasMode,
+  nodes,
+  regions,
+  pendingHighlightNe,
+  graphQueryData,
+  canvasQuery,
+  setCanvasQuery,
+  setSearchHitIds,
+  setFindOpen,
+  findActiveIdx,
+  setFindActiveIdx,
+  findBoxRef,
+  displayMenuRef,
+  isWorldFlatCanvasRef,
+  rfRef,
+  locateNode,
+  confirmDiscardIfDirty,
+  setMapId,
+  setSelectedFolderId,
+  setExpandedIds,
+  setPendingHighlightNe,
+  setTreeNeQuery,
+  setDebouncedTreeNeQuery,
+  setTreeSearchOpen,
+  showError,
+  t,
+}: Args) {
+  const findJustLocatedRef = useRef(false);
+  const pendingLocateWorldRef = useRef<{
+    id: string;
+    worldX?: number;
+    worldY?: number;
+  } | null>(null);
+
+  const jumpToTreeSearchHit = useCallback(
+    (
+      hit: FabricNodeSearchHit,
+      view?: NonNullable<FabricNodeSearchHit["views"]>[number],
+    ) => {
+      const views = hit.views || [];
+      const worldCoords =
+        hit.world_x != null && hit.world_y != null
+          ? { worldX: Number(hit.world_x), worldY: Number(hit.world_y) }
+          : undefined;
+      const onCurrent =
+        Boolean(mapId) &&
+        (views.some((v) => v.view_id === mapId) ||
+          nodes.some((n) => n.id === hit.id) ||
+          (isWorldFlatCanvasRef.current && worldCoords != null));
+      if (onCurrent && mapId && (!view || view.view_id === mapId)) {
+        if (isWorldFlatCanvasRef.current) {
+          locateNode(hit.id, worldCoords);
+        } else if (nodes.some((n) => n.id === hit.id)) {
+          locateNode(hit.id);
+        } else {
+          setPendingHighlightNe(hit.id);
+        }
+        setTreeNeQuery("");
+        setDebouncedTreeNeQuery("");
+        setTreeSearchOpen(false);
+        return;
+      }
+      const target =
+        view ||
+        (WORLD_MAP_ENABLED
+          ? views.find((v) => isWorldFlatViewName(v.view_name))
+          : undefined) ||
+        views.find((v) => !isWorldFlatViewName(v.view_name) && String(v.kind) === "physical") ||
+        views.find((v) => !isWorldFlatViewName(v.view_name)) ||
+        views[0] ||
+        null;
+      if (!target) {
+        showError(t("topology.treeSearchNotOnMap"));
+        return;
+      }
+      if (!WORLD_MAP_ENABLED && isWorldFlatViewName(target.view_name)) {
+        showError(t("topology.worldMapOffline"));
+        return;
+      }
+      if (!confirmDiscardIfDirty()) return;
+      const regionId = target.folder_id || findViewInRegion(regions, target.view_id)?.region.id;
+      if (regionId) {
+        setSelectedFolderId(regionId);
+        setExpandedIds((p) => ({ ...p, [regionId]: true }));
+      }
+      if (WORLD_MAP_ENABLED && isWorldFlatViewName(target.view_name) && worldCoords) {
+        pendingLocateWorldRef.current = { id: hit.id, ...worldCoords };
+      } else {
+        pendingLocateWorldRef.current = null;
+      }
+      setMapId(target.view_id);
+      setPendingHighlightNe(hit.id);
+      setTreeNeQuery("");
+      setDebouncedTreeNeQuery("");
+      setTreeSearchOpen(false);
+    },
+    [
+      mapId,
+      nodes,
+      locateNode,
+      showError,
+      t,
+      confirmDiscardIfDirty,
+      regions,
+      setSelectedFolderId,
+      setMapId,
+      setPendingHighlightNe,
+      setTreeNeQuery,
+      setDebouncedTreeNeQuery,
+      setTreeSearchOpen,
+      setExpandedIds,
+      isWorldFlatCanvasRef,
+    ],
+  );
+
+  useEffect(() => {
+    if (!pendingHighlightNe || !canvasMode) return;
+    const nodeId = pendingHighlightNe;
+    const pendingWorld = pendingLocateWorldRef.current;
+    if (
+      pendingWorld &&
+      pendingWorld.id === nodeId &&
+      isWorldFlatCanvasRef.current &&
+      rfRef.current
+    ) {
+      pendingLocateWorldRef.current = null;
+      setPendingHighlightNe("");
+      window.setTimeout(
+        () =>
+          locateNode(nodeId, {
+            worldX: pendingWorld.worldX,
+            worldY: pendingWorld.worldY,
+          }),
+        80,
+      );
+      return;
+    }
+    if (!nodes.length || !nodes.some((n) => n.id === nodeId)) return;
+    pendingLocateWorldRef.current = null;
+    setPendingHighlightNe("");
+    window.setTimeout(() => locateNode(nodeId), 80);
+  }, [
+    pendingHighlightNe,
+    canvasMode,
+    nodes,
+    locateNode,
+    mapId,
+    graphQueryData,
+    isWorldFlatCanvasRef,
+    rfRef,
+    setPendingHighlightNe,
+  ]);
+
+  const canvasHits = useMemo(() => {
+    const q = canvasQuery.trim();
+    if (!q) return [];
+    return nodes.filter((n) => nodeMatchesQuery(n, q));
+  }, [canvasQuery, nodes]);
+
+  useEffect(() => {
+    const q = canvasQuery.trim();
+    if (!q) {
+      setFindActiveIdx(0);
+      setFindOpen(false);
+      if (findJustLocatedRef.current) {
+        findJustLocatedRef.current = false;
+        return;
+      }
+      setSearchHitIds([]);
+      return;
+    }
+    setFindOpen(true);
+    setSearchHitIds(canvasHits.map((n) => n.id));
+    setFindActiveIdx((idx) => (canvasHits.length ? Math.min(idx, canvasHits.length - 1) : 0));
+  }, [canvasQuery, canvasHits, setFindActiveIdx, setFindOpen, setSearchHitIds]);
+
+  const findOnCanvas = useCallback(
+    (nodeId?: string) => {
+      const q = canvasQuery.trim();
+      if (!q) return;
+      if (!canvasHits.length) {
+        showError(t("topology.findNoMatch"));
+        return;
+      }
+      const id =
+        nodeId ||
+        canvasHits[Math.max(0, Math.min(findActiveIdx, canvasHits.length - 1))]?.id ||
+        canvasHits[0].id;
+      findJustLocatedRef.current = true;
+      setFindOpen(false);
+      setCanvasQuery("");
+      setFindActiveIdx(0);
+      locateNode(id);
+    },
+    [
+      canvasQuery,
+      canvasHits,
+      findActiveIdx,
+      locateNode,
+      showError,
+      t,
+      setFindOpen,
+      setCanvasQuery,
+      setFindActiveIdx,
+    ],
+  );
+
+  useEffect(() => {
+    const onDoc = (e: MouseEvent) => {
+      const target = e.target as HTMLElement | null;
+      if (findBoxRef.current && target && !findBoxRef.current.contains(target)) {
+        setFindOpen(false);
+      }
+      const details = displayMenuRef.current;
+      if (details?.open && target && !details.contains(target)) {
+        details.open = false;
+      }
+    };
+    document.addEventListener("mousedown", onDoc);
+    return () => document.removeEventListener("mousedown", onDoc);
+  }, [displayMenuRef, findBoxRef, setFindOpen]);
+
+  return {
+    canvasHits,
+    jumpToTreeSearchHit,
+    findOnCanvas,
+  };
+}

web/src/features/topology/hooks/useTopologyHistory.ts

@@ -19,6 +19,12 @@ export function useTopologyHistory(
   const historyLockRef = useRef(false);
   const pendingEdgeDeletesRef = useRef<Set<string>>(new Set());
   const pendingEdgeCreatesRef = useRef<Set<string>>(new Set());
+  const pendingEdgePortEditsRef = useRef<Map<string, { a_port: string; b_port: string }>>(
+    new Map(),
+  );
+  const pendingEdgeStyleRef = useRef<
+    Map<string, { stroke_color: string; stroke_width: number; line_style: string }>
+  >(new Map());
 
   const canUndo = historyTick >= 0 && historyRef.current.length > 0;
   const canRedo = historyTick >= 0 && redoRef.current.length > 0;
@@ -48,6 +54,8 @@ export function useTopologyHistory(
       edges: edges.map((e) => ({ ...e })),
       pendingEdgeDeletes: [...pendingEdgeDeletesRef.current],
       pendingEdgeCreates: [...pendingEdgeCreatesRef.current],
+      pendingEdgePortEdits: [...pendingEdgePortEditsRef.current.entries()],
+      pendingEdgeStyles: [...pendingEdgeStyleRef.current.entries()],
     }),
     [nodes, edges],
   );
@@ -59,6 +67,14 @@ export function useTopologyHistory(
     bumpHistory();
   }, [snapshot, bumpHistory]);
 
+  /** Drop the latest undo frame without applying it (e.g. click that never moved). */
+  const popHistory = useCallback(() => {
+    if (historyLockRef.current) return;
+    if (!historyRef.current.length) return;
+    historyRef.current.pop();
+    bumpHistory();
+  }, [bumpHistory]);
+
   const undo = useCallback(() => {
     const prev = historyRef.current.pop();
     if (!prev) return;
@@ -68,6 +84,8 @@ export function useTopologyHistory(
     setEdges(prev.edges);
     pendingEdgeDeletesRef.current = new Set(prev.pendingEdgeDeletes);
     pendingEdgeCreatesRef.current = new Set(prev.pendingEdgeCreates || []);
+    pendingEdgePortEditsRef.current = new Map(prev.pendingEdgePortEdits || []);
+    pendingEdgeStyleRef.current = new Map(prev.pendingEdgeStyles || []);
     markDirty();
     bumpHistory();
     historyLockRef.current = false;
@@ -82,6 +100,8 @@ export function useTopologyHistory(
     setEdges(next.edges);
     pendingEdgeDeletesRef.current = new Set(next.pendingEdgeDeletes);
     pendingEdgeCreatesRef.current = new Set(next.pendingEdgeCreates || []);
+    pendingEdgePortEditsRef.current = new Map(next.pendingEdgePortEdits || []);
+    pendingEdgeStyleRef.current = new Map(next.pendingEdgeStyles || []);
     markDirty();
     bumpHistory();
     historyLockRef.current = false;
@@ -97,11 +117,14 @@ export function useTopologyHistory(
     historyLockRef,
     pendingEdgeDeletesRef,
     pendingEdgeCreatesRef,
+    pendingEdgePortEditsRef,
+    pendingEdgeStyleRef,
     markDirty,
     clearDirty,
     bumpHistory,
     confirmDiscardIfDirty,
     pushHistory,
+    popHistory,
     undo,
     redo,
   };

web/src/features/topology/hooks/useTopologyKeyboard.ts

@@ -0,0 +1,133 @@
+import { useEffect, useRef } from "react";
+import type { Edge, Node } from "@xyflow/react";
+import type { UseMutationResult } from "@tanstack/react-query";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import { toolModeFromKey, type ToolMode } from "../lib/toolMode";
+
+type Args = {
+  canWriteTopology: boolean;
+  mapId: string;
+  nodes: Node<NeNodeData>[];
+  edges: Edge[];
+  dirtyRef: React.MutableRefObject<boolean>;
+  connectClickRef: React.MutableRefObject<string | null>;
+  displayMenuRef: React.MutableRefObject<HTMLDetailsElement | null>;
+  saveMut: Pick<UseMutationResult<unknown, unknown, void, unknown>, "isPending" | "mutate">;
+  closeCtxMenu: () => void;
+  clearSelection: () => void;
+  setToolMode: React.Dispatch<React.SetStateAction<ToolMode>>;
+  setFindOpen: React.Dispatch<React.SetStateAction<boolean>>;
+  undo: () => void;
+  redo: () => void;
+  selectAllNodes: () => void;
+  removeSelected: () => void;
+};
+
+/**
+ * Global topology shortcuts. Handlers are read via refs so the window
+ * listener is not rebound on every nodes/edges change.
+ */
+export function useTopologyKeyboard({
+  canWriteTopology,
+  mapId,
+  nodes,
+  edges,
+  dirtyRef,
+  connectClickRef,
+  displayMenuRef,
+  saveMut,
+  closeCtxMenu,
+  clearSelection,
+  setToolMode,
+  setFindOpen,
+  undo,
+  redo,
+  selectAllNodes,
+  removeSelected,
+}: Args) {
+  const latestRef = useRef({
+    canWriteTopology,
+    mapId,
+    nodes,
+    edges,
+    saveMut,
+    closeCtxMenu,
+    clearSelection,
+    setToolMode,
+    setFindOpen,
+    undo,
+    redo,
+    selectAllNodes,
+    removeSelected,
+  });
+  latestRef.current = {
+    canWriteTopology,
+    mapId,
+    nodes,
+    edges,
+    saveMut,
+    closeCtxMenu,
+    clearSelection,
+    setToolMode,
+    setFindOpen,
+    undo,
+    redo,
+    selectAllNodes,
+    removeSelected,
+  };
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      const tag = (e.target as HTMLElement | null)?.tagName?.toLowerCase();
+      if (tag === "input" || tag === "textarea" || tag === "select" || (e.target as HTMLElement)?.isContentEditable) {
+        return;
+      }
+      const s = latestRef.current;
+      if (e.key === "Escape") {
+        s.closeCtxMenu();
+        s.clearSelection();
+        connectClickRef.current = null;
+        s.setToolMode((m) => (m === "connect" ? "select" : m));
+        if (displayMenuRef.current?.open) displayMenuRef.current.open = false;
+        s.setFindOpen(false);
+        return;
+      }
+      const mode = toolModeFromKey(e.key);
+      if (mode && !e.ctrlKey && !e.metaKey && !e.altKey) {
+        e.preventDefault();
+        s.setToolMode(mode);
+        connectClickRef.current = null;
+        return;
+      }
+      if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "s") {
+        e.preventDefault();
+        if (s.canWriteTopology && s.mapId && dirtyRef.current && !s.saveMut.isPending) s.saveMut.mutate();
+        return;
+      }
+      if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "z" && !e.shiftKey) {
+        e.preventDefault();
+        s.undo();
+        return;
+      }
+      if ((e.ctrlKey || e.metaKey) && (e.key.toLowerCase() === "y" || (e.key.toLowerCase() === "z" && e.shiftKey))) {
+        e.preventDefault();
+        s.redo();
+        return;
+      }
+      if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "a") {
+        e.preventDefault();
+        s.selectAllNodes();
+        return;
+      }
+      if (e.key === "Delete" || e.key === "Backspace") {
+        if (!s.canWriteTopology) return;
+        if (s.nodes.some((n) => n.selected) || s.edges.some((ed) => ed.selected)) {
+          e.preventDefault();
+          void s.removeSelected();
+        }
+      }
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+  }, [connectClickRef, displayMenuRef, dirtyRef]);
+}

web/src/features/topology/hooks/useTopologyNodeOps.ts

@@ -0,0 +1,149 @@
+import { useCallback } from "react";
+import { useQueryClient } from "@tanstack/react-query";
+import type { Edge, Node } from "@xyflow/react";
+import { queryKeys } from "../../../constants/queryKeys";
+import { fetchTopologyGraph, purgePlaceholderFabricNodes } from "../../../services/api";
+import type { TopologyViewGraph } from "../../../types";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import { isPlaceholderSource } from "../lib/searchUtils";
+
+type Args = {
+  mapId: string;
+  nodes: Node<NeNodeData>[];
+  selectedNode: Node<NeNodeData> | null;
+  setNodes: React.Dispatch<React.SetStateAction<Node<NeNodeData>[]>>;
+  setEdges: React.Dispatch<React.SetStateAction<Edge[]>>;
+  pendingEdgeCreatesRef: React.MutableRefObject<Set<string>>;
+  dirtyRef: React.MutableRefObject<boolean>;
+  appliedMapIdRef: React.MutableRefObject<string>;
+  pushHistory: () => void;
+  markDirty: () => void;
+  bumpHistory: () => void;
+  closeCtxMenu: () => void;
+  commitCanvas: () => Promise<unknown>;
+  resetLocalFromServer: (graph: TopologyViewGraph) => void;
+  showOk: (msg: string) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+};
+
+export function useTopologyNodeOps({
+  mapId,
+  nodes,
+  selectedNode,
+  setNodes,
+  setEdges,
+  pendingEdgeCreatesRef,
+  dirtyRef,
+  appliedMapIdRef,
+  pushHistory,
+  markDirty,
+  bumpHistory,
+  closeCtxMenu,
+  commitCanvas,
+  resetLocalFromServer,
+  showOk,
+  showError,
+  t,
+}: Args) {
+  const queryClient = useQueryClient();
+
+  const renameSelectedNode = useCallback(() => {
+    if (!selectedNode) return;
+    const currentOverride = String(selectedNode.data.label_override ?? "");
+    const next = window.prompt(
+      `${t("topology.renameNodePrompt")}\n${t("topology.renameNodeClearHint")}`,
+      currentOverride || selectedNode.data.label || "",
+    );
+    if (next == null) return;
+    const override = next.trim();
+    const prevOverride = currentOverride;
+    const display =
+      override ||
+      selectedNode.data.name ||
+      selectedNode.data.ne_ip ||
+      selectedNode.id;
+    if (override === prevOverride && display === (selectedNode.data.label || "")) {
+      closeCtxMenu();
+      return;
+    }
+    pushHistory();
+    markDirty();
+    setNodes((ns) =>
+      ns.map((n) =>
+        n.id === selectedNode.id
+          ? {
+              ...n,
+              data: {
+                ...n.data,
+                label: display,
+                label_override: override,
+              },
+            }
+          : n,
+      ),
+    );
+    closeCtxMenu();
+  }, [selectedNode, t, pushHistory, markDirty, setNodes, closeCtxMenu]);
+
+  const removeNodeById = useCallback(
+    (nodeId: string) => {
+      if (!mapId) return;
+      pushHistory();
+      closeCtxMenu();
+      setNodes((ns) => ns.filter((n) => n.id !== nodeId));
+      setEdges((es) => {
+        const next = es.filter((e) => e.source !== nodeId && e.target !== nodeId);
+        for (const e of es) {
+          if (next.some((x) => x.id === e.id)) continue;
+          pendingEdgeCreatesRef.current.delete(e.id);
+        }
+        return next;
+      });
+      markDirty();
+    },
+    [mapId, pushHistory, closeCtxMenu, setNodes, setEdges, pendingEdgeCreatesRef, markDirty],
+  );
+
+  const purgePlaceholderById = useCallback(
+    async (nodeId: string) => {
+      if (!mapId) return;
+      const node = nodes.find((n) => n.id === nodeId);
+      if (!node || !isPlaceholderSource(node.data.managed_source, node.data.ne_ip)) {
+        return;
+      }
+      if (!window.confirm(t("topology.deletePlaceholderConfirm"))) return;
+      closeCtxMenu();
+      try {
+        if (dirtyRef.current) {
+          await commitCanvas();
+        }
+        await purgePlaceholderFabricNodes([nodeId]);
+        const graph = await fetchTopologyGraph(mapId);
+        queryClient.setQueryData(queryKeys.topologyGraph(mapId), graph);
+        appliedMapIdRef.current = mapId;
+        resetLocalFromServer(graph);
+        bumpHistory();
+        showOk(t("topology.deletePlaceholderDone"));
+      } catch (err) {
+        showError(String(err));
+      }
+    },
+    [
+      mapId,
+      nodes,
+      closeCtxMenu,
+      commitCanvas,
+      resetLocalFromServer,
+      queryClient,
+      bumpHistory,
+      showOk,
+      showError,
+      t,
+      dirtyRef,
+      appliedMapIdRef,
+    ],
+  );
+
+  return { renameSelectedNode, removeNodeById, purgePlaceholderById };
+}

web/src/features/topology/hooks/useTopologyPalette.ts

@@ -0,0 +1,409 @@
+import { useCallback, useMemo, useState } from "react";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import type { Edge, Node, ReactFlowInstance } from "@xyflow/react";
+import { queryKeys } from "../../../constants/queryKeys";
+import {
+  addTopologyViewNodes,
+  fetchManagedNe,
+  fetchTopologyGraph,
+  fetchUmeNe,
+  patchTopologyPositions,
+} from "../../../services/api";
+import type { TopologyOutsidePeer } from "../../../types";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import { PALETTE_DND, SEP } from "../lib/constants";
+import type { PaletteItem, PaletteSource } from "../lib/pageTypes";
+import { fuzzyIncludes } from "../lib/searchUtils";
+import { isWorldFlatViewName } from "../lib/treeUtils";
+
+type Args = {
+  canWriteTopology: boolean;
+  mapId: string;
+  activeViewName?: string | null;
+  nodes: Node<NeNodeData>[];
+  keyword: string;
+  debouncedKeyword: string;
+  addNeOpen: boolean;
+  paletteSource: PaletteSource;
+  outsidePeers: TopologyOutsidePeer[];
+  outsidePeerQuery: string;
+  dirtyRef: React.MutableRefObject<boolean>;
+  rfRef: React.MutableRefObject<ReactFlowInstance<Node<NeNodeData>, Edge> | null>;
+  commitCanvas: () => Promise<unknown>;
+  resetLocalFromServer: (graph: Awaited<ReturnType<typeof fetchTopologyGraph>>) => void;
+  showOk: (msg: string) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+  setOutsidePeersOpen: React.Dispatch<React.SetStateAction<boolean>>;
+  setOutsidePeerSelectedIds: React.Dispatch<React.SetStateAction<string[]>>;
+};
+
+export function useTopologyPalette({
+  canWriteTopology,
+  mapId,
+  activeViewName,
+  nodes,
+  keyword,
+  debouncedKeyword,
+  addNeOpen,
+  paletteSource,
+  outsidePeers,
+  outsidePeerQuery,
+  dirtyRef,
+  rfRef,
+  commitCanvas,
+  resetLocalFromServer,
+  showOk,
+  showError,
+  t,
+  setOutsidePeersOpen,
+  setOutsidePeerSelectedIds,
+}: Args) {
+  const queryClient = useQueryClient();
+  const [paletteAdding, setPaletteAdding] = useState(false);
+  const [outsidePeersAdding, setOutsidePeersAdding] = useState(false);
+
+  const neQuery = useQuery({
+    queryKey: [...queryKeys.managedNeAll, "topology-add-ne", debouncedKeyword],
+    queryFn: () =>
+      fetchManagedNe({
+        keyword: debouncedKeyword,
+        vendor: "",
+        connectStatus: "",
+        page: 1,
+        pageSize: 100,
+      }),
+    enabled: addNeOpen && paletteSource === "managed",
+  });
+
+  const umeQuery = useQuery({
+    queryKey: ["umeInventoryNe", "topology-add-ne", debouncedKeyword],
+    queryFn: () =>
+      fetchUmeNe({
+        keyword: debouncedKeyword,
+        page: 1,
+        pageSize: 100,
+      }),
+    enabled: addNeOpen && paletteSource === "ume",
+  });
+
+  const addPaletteItems = useCallback(
+    async (items: PaletteItem[], origin?: { x: number; y: number }): Promise<boolean> => {
+      if (!canWriteTopology) return false;
+      if (!mapId) {
+        showError(t("topology.selectMap"));
+        return false;
+      }
+      if (isWorldFlatViewName(activeViewName)) {
+        showError(t("topology.worldMapNoDirectNes"));
+        return false;
+      }
+      if (items.length === 0 || paletteAdding) return false;
+
+      const onCanvasManaged = new Set(nodes.map((n) => n.data.managed_ne_id).filter(Boolean));
+      const onCanvasUme = new Set(nodes.map((n) => n.data.ume_ne_id).filter(Boolean));
+      const managedIds = [
+        ...new Set(
+          items
+            .filter((item) => item.source === "managed")
+            .map((item) => item.managed_ne_id)
+            .filter((id) => id && !onCanvasManaged.has(id)),
+        ),
+      ];
+      const umeIds = [
+        ...new Set(
+          items
+            .filter((item) => item.source === "ume")
+            .map((item) => item.ume_ne_id)
+            .filter((id) => id && !onCanvasUme.has(id)),
+        ),
+      ];
+      if (managedIds.length === 0 && umeIds.length === 0) return false;
+
+      if (dirtyRef.current) {
+        if (!window.confirm(t("topology.unsavedSaveBeforeAdd"))) return false;
+        try {
+          await commitCanvas();
+        } catch (err) {
+          showError(String(err));
+          return false;
+        }
+      }
+
+      setPaletteAdding(true);
+      try {
+        const graph = await addTopologyViewNodes(mapId, {
+          managed_ne_ids: managedIds,
+          ume_ne_ids: umeIds,
+          layout: "grid",
+        });
+        const managedSet = new Set(managedIds);
+        const umeSet = new Set(umeIds);
+        const added = graph.nodes.filter(
+          (n) =>
+            (n.managed_ne_id && managedSet.has(n.managed_ne_id)) ||
+            (n.ume_ne_id && umeSet.has(n.ume_ne_id)),
+        );
+        if (added.length > 0) {
+          const start = origin || { x: 80 + nodes.length * 24, y: 80 + nodes.length * 24 };
+          const cols = Math.max(1, Math.ceil(Math.sqrt(added.length)));
+          await patchTopologyPositions(
+            mapId,
+            added.map((n, i) => ({
+              fabric_node_id: n.fabric_node_id,
+              x: start.x + (i % cols) * 180,
+              y: start.y + Math.floor(i / cols) * 120,
+            })),
+          );
+        }
+        const refreshed = await fetchTopologyGraph(mapId);
+        queryClient.setQueryData(queryKeys.topologyGraph(mapId), refreshed);
+        resetLocalFromServer(refreshed);
+        const count = added.length || managedIds.length + umeIds.length;
+        showOk(t("topology.addSelectedDone").replace("{{count}}", String(count)));
+        return count > 0;
+      } catch (err) {
+        showError(String(err));
+        return false;
+      } finally {
+        setPaletteAdding(false);
+      }
+    },
+    [
+      mapId,
+      nodes,
+      paletteAdding,
+      showError,
+      showOk,
+      t,
+      queryClient,
+      resetLocalFromServer,
+      commitCanvas,
+      dirtyRef,
+      activeViewName,
+      canWriteTopology,
+    ],
+  );
+
+  const addNodeAt = useCallback(
+    async (item: PaletteItem, position: { x: number; y: number }) => {
+      await addPaletteItems([item], position);
+    },
+    [addPaletteItems],
+  );
+
+  const onPaletteDragStart = (e: React.DragEvent, item: PaletteItem) => {
+    e.dataTransfer.setData(PALETTE_DND, JSON.stringify(item));
+    e.dataTransfer.effectAllowed = "copy";
+  };
+
+  const onCanvasDragOver = (e: React.DragEvent) => {
+    if (!e.dataTransfer.types.includes(PALETTE_DND)) return;
+    e.preventDefault();
+    e.dataTransfer.dropEffect = "copy";
+  };
+
+  const onCanvasDrop = (e: React.DragEvent) => {
+    e.preventDefault();
+    if (!canWriteTopology) return;
+    const raw = e.dataTransfer.getData(PALETTE_DND);
+    if (!raw || !rfRef.current) return;
+    try {
+      const item = JSON.parse(raw) as PaletteItem;
+      const pos = rfRef.current.screenToFlowPosition({ x: e.clientX, y: e.clientY });
+      void addNodeAt(item, pos);
+    } catch {
+      /* ignore */
+    }
+  };
+
+  const addOutsidePeers = useCallback(
+    async (fabricNodeIds: string[]): Promise<boolean> => {
+      if (!mapId) return false;
+      const ids = [...new Set(fabricNodeIds.map((x) => String(x || "").trim()).filter(Boolean))];
+      if (!ids.length || outsidePeersAdding) return false;
+
+      if (dirtyRef.current) {
+        if (!window.confirm(t("topology.unsavedSaveBeforeAdd"))) return false;
+        try {
+          await commitCanvas();
+        } catch (err) {
+          showError(String(err));
+          return false;
+        }
+      }
+
+      setOutsidePeersAdding(true);
+      try {
+        const onCanvas = new Set(nodes.map((n) => n.id));
+        const toAdd = ids.filter((id) => !onCanvas.has(id));
+        if (!toAdd.length) {
+          setOutsidePeersOpen(false);
+          setOutsidePeerSelectedIds([]);
+          return false;
+        }
+        const graph = await addTopologyViewNodes(mapId, {
+          fabric_node_ids: toAdd,
+          layout: "grid",
+        });
+        if (graph.truncate_reason === "membership_frozen") {
+          showError(t("topology.truncatedFrozen"));
+          return false;
+        }
+        const addedSet = new Set(toAdd);
+        const added = (graph.nodes || []).filter((n) => addedSet.has(n.fabric_node_id));
+        if (added.length > 0) {
+          const viaAnchors = new Map(
+            outsidePeers
+              .filter((p) => addedSet.has(p.fabric_node_id))
+              .map((p) => [p.fabric_node_id, p.via_node_id] as const),
+          );
+          const cols = Math.max(1, Math.ceil(Math.sqrt(added.length)));
+          await patchTopologyPositions(
+            mapId,
+            added.map((n, i) => {
+              const viaId = viaAnchors.get(n.fabric_node_id);
+              const viaNode = viaId ? nodes.find((x) => x.id === viaId) : undefined;
+              const base = viaNode
+                ? { x: viaNode.position.x + 200, y: viaNode.position.y }
+                : { x: 80 + nodes.length * 24, y: 80 + nodes.length * 24 };
+              return {
+                fabric_node_id: n.fabric_node_id,
+                x: base.x + (i % cols) * 180,
+                y: base.y + Math.floor(i / cols) * 120,
+              };
+            }),
+          );
+        }
+        const refreshed = await fetchTopologyGraph(mapId);
+        queryClient.setQueryData(queryKeys.topologyGraph(mapId), refreshed);
+        resetLocalFromServer(refreshed);
+        const count = added.length || toAdd.length;
+        showOk(t("topology.projectedNeighbors").replace("{{count}}", String(count)));
+        setOutsidePeerSelectedIds([]);
+        setOutsidePeersOpen(false);
+        return count > 0;
+      } catch (err) {
+        showError(String(err));
+        return false;
+      } finally {
+        setOutsidePeersAdding(false);
+      }
+    },
+    [
+      mapId,
+      nodes,
+      outsidePeers,
+      outsidePeersAdding,
+      resetLocalFromServer,
+      commitCanvas,
+      dirtyRef,
+      queryClient,
+      showOk,
+      showError,
+      t,
+      setOutsidePeersOpen,
+      setOutsidePeerSelectedIds,
+    ],
+  );
+
+  const outsidePeerNameById = useMemo(() => {
+    const m = new Map<string, string>();
+    for (const n of nodes) {
+      const label = String(n.data?.label || n.data?.subtitle || "").trim();
+      m.set(n.id, label || n.id.slice(0, 8));
+    }
+    return m;
+  }, [nodes]);
+
+  const outsidePeersVisible = useMemo(() => {
+    const q = outsidePeerQuery.trim().toLowerCase();
+    if (!q) return outsidePeers;
+    return outsidePeers.filter((p) => {
+      const viaName = outsidePeerNameById.get(p.via_node_id) || p.via_node_id;
+      const bits = [p.name, p.ip, viaName, p.fabric_node_id];
+      return bits.some((b) => String(b || "").toLowerCase().includes(q));
+    });
+  }, [outsidePeers, outsidePeerQuery, outsidePeerNameById]);
+
+  const onCanvasManagedIds = useMemo(
+    () => new Set(nodes.map((n) => n.data.managed_ne_id).filter(Boolean)),
+    [nodes],
+  );
+  const onCanvasUmeIds = useMemo(
+    () => new Set(nodes.map((n) => n.data.ume_ne_id).filter(Boolean)),
+    [nodes],
+  );
+
+  const palette = useMemo((): PaletteItem[] => {
+    if (paletteSource === "ume") {
+      return (umeQuery.data?.items || []).map((ne) => {
+        const name = (ne.host_name || ne.ne_name || ne.user_label || ne.ip_address || ne.ne_id).trim();
+        return {
+          key: `ume:${ne.ne_id}`,
+          source: "ume" as const,
+          managed_ne_id: "",
+          ume_ne_id: ne.ne_id,
+          name,
+          ip: ne.ip_address || "",
+          vendor: "ZTE",
+          meta: `${ne.ip_address || "-"}${SEP}${ne.ne_type || "UME"}`,
+          connect_status: ne.connection_status || "",
+        };
+      });
+    }
+    return (neQuery.data?.items || []).map((ne) => ({
+      key: `managed:${ne.id}`,
+      source: "managed" as const,
+      managed_ne_id: ne.id,
+      ume_ne_id: "",
+      name: ne.name || ne.ip_address,
+      ip: ne.ip_address,
+      vendor: ne.vendor,
+      meta: `${ne.ip_address}${SEP}${ne.vendor}`,
+      connect_status: ne.connect_status,
+    }));
+  }, [paletteSource, neQuery.data, umeQuery.data]);
+
+  const paletteVisible = useMemo(() => {
+    const tokens = keyword
+      .trim()
+      .toLowerCase()
+      .split(/\s+/)
+      .filter(Boolean);
+    let list = palette;
+    if (tokens.length) {
+      list = list.filter((item) => {
+        const bits = [item.name, item.ip, item.vendor, item.managed_ne_id, item.ume_ne_id, item.meta];
+        return tokens.every((tok) => bits.some((b) => fuzzyIncludes(String(b || ""), tok)));
+      });
+    }
+    return list.filter((item) =>
+      item.source === "managed"
+        ? !onCanvasManagedIds.has(item.managed_ne_id)
+        : !onCanvasUmeIds.has(item.ume_ne_id),
+    );
+  }, [palette, onCanvasManagedIds, onCanvasUmeIds, keyword]);
+
+  const paletteLoading =
+    (paletteSource === "managed" && neQuery.isLoading) ||
+    (paletteSource === "ume" && umeQuery.isLoading);
+
+  return {
+    paletteAdding,
+    outsidePeersAdding,
+    neQuery,
+    umeQuery,
+    addPaletteItems,
+    addNodeAt,
+    onPaletteDragStart,
+    onCanvasDragOver,
+    onCanvasDrop,
+    addOutsidePeers,
+    outsidePeerNameById,
+    outsidePeersVisible,
+    palette,
+    paletteVisible,
+    paletteLoading,
+  };
+}

web/src/features/topology/hooks/useTopologySave.ts

@@ -0,0 +1,152 @@
+import { useCallback } from "react";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import type { Edge, Node } from "@xyflow/react";
+import { queryKeys } from "../../../constants/queryKeys";
+import { formatErr } from "../../../services/api";
+import { commitTopologyView } from "../../../services/api/topology";
+import type { TopologyViewGraph } from "../../../types";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import { applyViewGraph, flowToPositions } from "../lib/graphFlow";
+import type { EdgeDefaults } from "../lib/edgeStyle";
+import type { HistorySnap } from "../lib/pageTypes";
+import { buildViewCommitBody } from "../lib/saveDiff";
+
+type PortEdit = { a_port: string; b_port: string };
+type StyleEdit = { stroke_color: string; stroke_width: number; line_style: string };
+
+type Args = {
+  mapId: string;
+  nodes: Node<NeNodeData>[];
+  edges: Edge[];
+  graphQueryData?: TopologyViewGraph;
+  edgeDefaults: EdgeDefaults;
+  setNodes: React.Dispatch<React.SetStateAction<Node<NeNodeData>[]>>;
+  setEdges: React.Dispatch<React.SetStateAction<Edge[]>>;
+  historyRef: React.MutableRefObject<HistorySnap[]>;
+  redoRef: React.MutableRefObject<HistorySnap[]>;
+  historyLockRef: React.MutableRefObject<boolean>;
+  pendingEdgeCreatesRef: React.MutableRefObject<Set<string>>;
+  pendingEdgeDeletesRef: React.MutableRefObject<Set<string>>;
+  pendingEdgePortEditsRef: React.MutableRefObject<Map<string, PortEdit>>;
+  pendingEdgeStyleRef: React.MutableRefObject<Map<string, StyleEdit>>;
+  clearDirty: () => void;
+  showOk: (msg: string) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+};
+
+export function useTopologySave({
+  mapId,
+  nodes,
+  edges,
+  graphQueryData,
+  edgeDefaults,
+  setNodes,
+  setEdges,
+  historyRef,
+  redoRef,
+  historyLockRef,
+  pendingEdgeCreatesRef,
+  pendingEdgeDeletesRef,
+  pendingEdgePortEditsRef,
+  pendingEdgeStyleRef,
+  clearDirty,
+  showOk,
+  showError,
+  t,
+}: Args) {
+  const queryClient = useQueryClient();
+
+  const resetLocalFromServer = useCallback(
+    (graph: TopologyViewGraph) => {
+      historyLockRef.current = true;
+      applyViewGraph(graph, edgeDefaults, setNodes, setEdges);
+      historyLockRef.current = false;
+      pendingEdgeCreatesRef.current = new Set();
+      pendingEdgeDeletesRef.current = new Set();
+      pendingEdgePortEditsRef.current = new Map();
+      pendingEdgeStyleRef.current = new Map();
+      historyRef.current = [];
+      redoRef.current = [];
+      clearDirty();
+    },
+    [
+      edgeDefaults,
+      setNodes,
+      setEdges,
+      historyLockRef,
+      pendingEdgeCreatesRef,
+      pendingEdgeDeletesRef,
+      pendingEdgePortEditsRef,
+      pendingEdgeStyleRef,
+      historyRef,
+      redoRef,
+      clearDirty,
+    ],
+  );
+
+  const commitCanvas = useCallback(async () => {
+    if (!mapId) throw new Error(t("topology.selectMap"));
+    const body = buildViewCommitBody({
+      nodes,
+      edges,
+      serverNodeIds: (graphQueryData?.nodes || []).map((n) => n.fabric_node_id),
+      positions: flowToPositions(nodes),
+      pendingCreates: pendingEdgeCreatesRef.current,
+      pendingDeletes: pendingEdgeDeletesRef.current,
+      pendingPortEdits: pendingEdgePortEditsRef.current,
+      pendingStyles: pendingEdgeStyleRef.current,
+    });
+    const result = await commitTopologyView(mapId, body);
+    if (result.graph) {
+      queryClient.setQueryData(queryKeys.topologyGraph(mapId), result.graph);
+      resetLocalFromServer(result.graph);
+    } else {
+      pendingEdgeCreatesRef.current = new Set();
+      pendingEdgeDeletesRef.current = new Set();
+      pendingEdgePortEditsRef.current = new Map();
+      pendingEdgeStyleRef.current = new Map();
+      historyRef.current = [];
+      redoRef.current = [];
+      clearDirty();
+      await queryClient.invalidateQueries({ queryKey: queryKeys.topologyGraph(mapId) });
+    }
+    await queryClient.invalidateQueries({ queryKey: queryKeys.topologyMaps });
+    return result;
+  }, [
+    mapId,
+    nodes,
+    edges,
+    graphQueryData,
+    pendingEdgeCreatesRef,
+    pendingEdgeDeletesRef,
+    historyRef,
+    redoRef,
+    clearDirty,
+    queryClient,
+    resetLocalFromServer,
+    t,
+  ]);
+
+  const saveMut = useMutation({
+    mutationFn: commitCanvas,
+    onSuccess: (result) => {
+      const skipped = Number(result.skipped_locked || 0);
+      if (skipped > 0) {
+        showOk(t("topology.savedLockedSkipped").replace("{{count}}", String(skipped)));
+      } else {
+        showOk(t("topology.saved"));
+      }
+    },
+    onError: async (err) => {
+      showError(t("topology.saveFailed").replace("{{detail}}", formatErr(err)));
+      await queryClient.invalidateQueries({ queryKey: queryKeys.topologyGraph(mapId) });
+    },
+  });
+
+  return {
+    saveMut,
+    commitCanvas,
+    resetLocalFromServer,
+  };
+}

web/src/features/topology/lib/fitNodes.ts

@@ -0,0 +1,49 @@
+import type { Node, ReactFlowInstance } from "@xyflow/react";
+import { TOPO_NODE_H, TOPO_NODE_W } from "./topoGeometry";
+
+type FitOpts = {
+  padding: number;
+  duration?: number;
+  /** Smallest box to fit (flow units); keeps a single-node locate from zooming to max. */
+  minWidth?: number;
+  minHeight?: number;
+};
+
+/**
+ * Fit the viewport to nodes using their known geometry.
+ *
+ * xyflow's fitView waits until the targeted nodes are measured. With
+ * onlyRenderVisibleElements, nodes outside the initial viewport are never rendered,
+ * so on a large canvas far from the origin fitView stays queued forever and the
+ * user sees an empty canvas. Our nodes carry explicit width/height, so we compute
+ * the bounds ourselves and use fitBounds, which needs no measurement.
+ */
+export function fitToNodes(
+  inst: Pick<ReactFlowInstance, "fitBounds">,
+  nodes: Array<Pick<Node, "position" | "width" | "height">>,
+  opts: FitOpts,
+): boolean {
+  if (!nodes.length) return false;
+  let minX = Infinity;
+  let minY = Infinity;
+  let maxX = -Infinity;
+  let maxY = -Infinity;
+  for (const n of nodes) {
+    const w = Number(n.width) || TOPO_NODE_W;
+    const h = Number(n.height) || TOPO_NODE_H;
+    minX = Math.min(minX, n.position.x);
+    minY = Math.min(minY, n.position.y);
+    maxX = Math.max(maxX, n.position.x + w);
+    maxY = Math.max(maxY, n.position.y + h);
+  }
+  if (!Number.isFinite(minX)) return false;
+  const width = Math.max(1, opts.minWidth ?? 0, maxX - minX);
+  const height = Math.max(1, opts.minHeight ?? 0, maxY - minY);
+  const cx = (minX + maxX) / 2;
+  const cy = (minY + maxY) / 2;
+  void inst.fitBounds(
+    { x: cx - width / 2, y: cy - height / 2, width, height },
+    { padding: opts.padding, duration: opts.duration ?? 0 },
+  );
+  return true;
+}

web/src/features/topology/lib/graphFlow.ts

@@ -31,18 +31,25 @@ export function graphToFlow(
     const position = isRegion ? regionFlowPosition(apiX, apiY) : neFlowPosition(apiX, apiY);
     const hx = isRegion ? TOPO_REGION_HANDLE_X : TOPO_HANDLE_X;
     const hy = isRegion ? TOPO_REGION_HANDLE_Y : TOPO_HANDLE_Y;
+    const locked = Boolean(n.locked);
+    const labelOverride = String(n.label_override ?? "");
     return {
       id: n.fabric_node_id,
       type: "neNode",
       position,
       width: TOPO_NODE_W,
       height: isRegion ? TOPO_REGION_ICON_H : TOPO_NODE_H,
+      draggable: locked ? false : undefined,
       handles: [
         { type: "target", position: "left" as Position, x: hx, y: hy },
         { type: "source", position: "right" as Position, x: hx, y: hy },
       ],
       data: {
         label: n.label || n.name || n.ip || n.fabric_node_id,
+        label_override: labelOverride,
+        label_override_saved: labelOverride,
+        name: n.name || "",
+        locked,
         managed_ne_id: n.managed_ne_id || "",
         ume_ne_id: n.ume_ne_id || "",
         ne_ip: n.ip || "",
@@ -93,12 +100,23 @@ export function flowToPositions(nodes: Node<NeNodeData>[]) {
     const pos = isRegion
       ? regionApiPosition(n.position.x, n.position.y)
       : neApiPosition(n.position.x, n.position.y);
-    return {
+    const out: {
+      fabric_node_id: string;
+      x: number;
+      y: number;
+      label?: string;
+    } = {
       fabric_node_id: n.id,
       x: pos.x,
       y: pos.y,
-      label: n.data.label || "",
     };
+    // Omit locked so the server keeps the existing lock; omit label unless overridden locally.
+    const currentOverride = String(n.data.label_override ?? "");
+    const savedOverride = String(n.data.label_override_saved ?? "");
+    if (currentOverride !== savedOverride) {
+      out.label = currentOverride;
+    }
+    return out;
   });
 }
 

web/src/features/topology/lib/moduleLinks.ts

@@ -0,0 +1,163 @@
+import type { Edge, Node } from "@xyflow/react";
+import { fetchManagedNeById } from "../../../services/api";
+import { openOrFocusModule } from "../../../utils/moduleWindows";
+import type { NeNodeData } from "../components/TopologyReactFlowView";
+import type { EdgeStyleData } from "./edgeStyle";
+
+export function openNeInventory(opts: {
+  neId?: string;
+  create?: boolean;
+  name?: string;
+  ip_address?: string;
+  vendor?: string;
+}) {
+  const q = new URLSearchParams();
+  if (opts.neId) {
+    q.set("ne_id", opts.neId);
+  } else if (opts.create) {
+    q.set("create", "1");
+    if (opts.name) q.set("name", opts.name);
+    if (opts.ip_address) q.set("ip_address", opts.ip_address);
+    if (opts.vendor) q.set("vendor", opts.vendor);
+  }
+  const qs = q.toString();
+  openOrFocusModule({
+    moduleId: "ne",
+    path: qs ? `/ne?${qs}` : "/ne",
+  });
+}
+
+type LinkToast = {
+  showOk: (msg: string) => void;
+  showError: (msg: string) => void;
+  t: (key: string) => string;
+  closeCtxMenu: () => void;
+};
+
+export function openWebcrtFor(
+  node: Node<NeNodeData> | null,
+  { showOk, showError, t, closeCtxMenu }: LinkToast,
+) {
+  closeCtxMenu();
+  if (!node) return;
+  const managedId = String(node.data.managed_ne_id || "").trim();
+  const umeId = String(node.data.ume_ne_id || "").trim();
+
+  if (managedId) {
+    void (async () => {
+      try {
+        const ne = await fetchManagedNeById(managedId);
+        const src = String(ne.source || "").trim().toLowerCase();
+        const hasIp = Boolean(String(ne.ip_address || "").trim());
+        // Ready inventory hosts: reuse stored credentials (incl. hop/proxy).
+        // LLDP / topology placeholders / incomplete rows → full NE edit form.
+        const needsSetup = !hasIp || src === "lldp" || src === "topology";
+        if (!needsSetup) {
+          openOrFocusModule({
+            moduleId: "webcrt",
+            path: `/webcrt?ne_id=${encodeURIComponent(managedId)}`,
+          });
+          return;
+        }
+        showOk(t("topology.completeNeFirst"));
+        openNeInventory({ neId: managedId });
+      } catch (err) {
+        showError(String(err));
+      }
+    })();
+    return;
+  }
+
+  if (umeId) {
+    openOrFocusModule({
+      moduleId: "webcrt",
+      path: `/webcrt?ne_id=${encodeURIComponent(umeId)}&source=ume`,
+    });
+    return;
+  }
+
+  // No inventory link — open NE create with topology hint fields.
+  showOk(t("topology.completeNeFirst"));
+  openNeInventory({
+    create: true,
+    name: String(node.data.label || "").trim(),
+    ip_address: String(node.data.ne_ip || "").trim(),
+    vendor: String(node.data.vendor || "").trim(),
+  });
+}
+
+export function openNeFor(
+  node: Node<NeNodeData> | null,
+  { showError, t, closeCtxMenu }: Pick<LinkToast, "showError" | "t" | "closeCtxMenu">,
+) {
+  closeCtxMenu();
+  const managedId = String(node?.data.managed_ne_id || "").trim();
+  const umeId = String(node?.data.ume_ne_id || "").trim();
+  if (managedId) {
+    openNeInventory({ neId: managedId });
+    return;
+  }
+  if (umeId) {
+    openOrFocusModule({
+      moduleId: "ume",
+      path: "/ume",
+    });
+    return;
+  }
+  showError(t("topology.noNeLink"));
+}
+
+export function openAlarmsFor(
+  node: Node<NeNodeData> | null,
+  { showError, t, closeCtxMenu }: Pick<LinkToast, "showError" | "t" | "closeCtxMenu">,
+) {
+  closeCtxMenu();
+  if (!node || node.data.kind === "region") {
+    showError(t("topology.noAlarmLink"));
+    return;
+  }
+  const host = String(node.data.label || node.data.ne_ip || "").trim();
+  const q = new URLSearchParams();
+  if (host) q.set("host", host);
+  q.set("cleared", "false");
+  openOrFocusModule({
+    moduleId: "network",
+    path: `/network/alarms?${q.toString()}`,
+  });
+}
+
+export function openPortTrafficForEdge(
+  edge: Edge | null,
+  nodes: Node<NeNodeData>[],
+  { showError, t, closeCtxMenu }: Pick<LinkToast, "showError" | "t" | "closeCtxMenu">,
+) {
+  closeCtxMenu();
+  if (!edge) {
+    showError(t("topology.noNeLink"));
+    return;
+  }
+  const srcNode = nodes.find((n) => n.id === edge.source);
+  const data = (edge.data || {}) as EdgeStyleData;
+  const ifname = String(data.source_port || "").trim();
+  const managedId = String(srcNode?.data.managed_ne_id || "").trim();
+  const umeId = String(srcNode?.data.ume_ne_id || "").trim();
+  if (managedId) {
+    const q = new URLSearchParams({ ne_id: managedId, source: "managed" });
+    if (ifname) q.set("ifname", ifname);
+    openOrFocusModule({
+      moduleId: "network",
+      path: `/network/tasks/port-traffic?${q.toString()}`,
+    });
+    return;
+  }
+  if (umeId) {
+    const q = new URLSearchParams({ ne_id: umeId, source: "ume" });
+    if (ifname) q.set("ifname", ifname);
+    openOrFocusModule({
+      moduleId: "network",
+      path: `/network/tasks/port-traffic?${q.toString()}`,
+    });
+    return;
+  }
+  showError(t("topology.noNeLink"));
+}

web/src/features/topology/lib/pageTypes.ts

@@ -6,6 +6,10 @@ export type HistorySnap = {
   edges: Edge[];
   pendingEdgeDeletes: string[];
   pendingEdgeCreates: string[];
+  pendingEdgePortEdits: Array<[string, { a_port: string; b_port: string }]>;
+  pendingEdgeStyles: Array<
+    [string, { stroke_color: string; stroke_width: number; line_style: string }]
+  >;
 };
 
 export type PaletteSource = "managed" | "ume";

web/src/features/topology/lib/pageViewModel.ts

@@ -0,0 +1,2 @@
+/** Loose bag for TopologyPage → TopologyPageView wiring (pure layout split). */
+export type TopologyPageViewModel = Record<string, any>;

web/src/features/topology/lib/saveDiff.ts

@@ -0,0 +1,136 @@
+/**
+ * Pure helpers that turn local canvas state into a view /commit body.
+ * Runtime-import-free so Node --experimental-strip-types tests can load this file.
+ */
+
+export type SaveDiffNode = {
+  id: string;
+  data?: { kind?: string };
+};
+
+export type SaveDiffEdge = {
+  id: string;
+  source: string;
+  target: string;
+  data?: {
+    source_port?: string;
+    target_port?: string;
+  };
+};
+
+export type SaveDiffPosition = {
+  fabric_node_id: string;
+  x: number;
+  y: number;
+  label?: string;
+};
+
+export type ViewCommitBody = {
+  edge_creates: Array<{
+    client_id: string;
+    a_node_id: string;
+    b_node_id: string;
+    a_port: string;
+    b_port: string;
+  }>;
+  edge_deletes: string[];
+  edge_port_edits: Array<{ id: string; a_port: string; b_port: string }>;
+  edge_styles: Array<{
+    fabric_edge_id: string;
+    stroke_color: string;
+    stroke_width: number;
+    line_style: string;
+  }>;
+  node_adds: string[];
+  node_removes: string[];
+  positions: SaveDiffPosition[];
+};
+
+export function isRegionNodeId(id: string): boolean {
+  return String(id || "").startsWith("region:");
+}
+
+export function isLocalPendingEdgeId(id: string): boolean {
+  return String(id || "").startsWith("local:");
+}
+
+export type BuildCommitInput = {
+  nodes: SaveDiffNode[];
+  edges: SaveDiffEdge[];
+  serverNodeIds: string[];
+  positions: SaveDiffPosition[];
+  pendingCreates: Iterable<string>;
+  pendingDeletes: Iterable<string>;
+  pendingPortEdits?: Iterable<[string, { a_port: string; b_port: string }]>;
+  pendingStyles?: Iterable<
+    [string, { stroke_color: string; stroke_width: number; line_style: string }]
+  >;
+};
+
+export function buildViewCommitBody(input: BuildCommitInput): ViewCommitBody {
+  const createSet = new Set(
+    [...input.pendingCreates].map((x) => String(x || "").trim()).filter(Boolean),
+  );
+  // Deletes that were also re-created (or are still local) must not be sent.
+  const deleteSet = new Set(
+    [...input.pendingDeletes]
+      .map((x) => String(x || "").trim())
+      .filter((id) => id && !isLocalPendingEdgeId(id) && !createSet.has(id)),
+  );
+
+  const edgeById = new Map(input.edges.map((e) => [e.id, e]));
+  const edge_creates = [...createSet]
+    .map((id) => edgeById.get(id))
+    .filter((e): e is SaveDiffEdge => Boolean(e))
+    .map((e) => ({
+      client_id: e.id,
+      a_node_id: e.source,
+      b_node_id: e.target,
+      a_port: String(e.data?.source_port || ""),
+      b_port: String(e.data?.target_port || ""),
+    }));
+
+  const localIds = input.nodes.map((n) => n.id);
+  const localSet = new Set(localIds);
+  const serverSet = new Set(
+    input.serverNodeIds.map((x) => String(x || "").trim()).filter(Boolean),
+  );
+  const node_adds = localIds.filter((id) => !serverSet.has(id) && !isRegionNodeId(id));
+  const node_removes = [...serverSet].filter((id) => !localSet.has(id) && !isRegionNodeId(id));
+
+  const edge_port_edits = [...(input.pendingPortEdits || [])]
+    .map(([id, ports]) => ({
+      id: String(id || "").trim(),
+      a_port: String(ports.a_port || ""),
+      b_port: String(ports.b_port || ""),
+    }))
+    .filter(
+      (x) => x.id && !isLocalPendingEdgeId(x.id) && !createSet.has(x.id) && !deleteSet.has(x.id),
+    );
+
+  const edge_styles = [...(input.pendingStyles || [])]
+    .map(([id, style]) => ({
+      fabric_edge_id: String(id || "").trim(),
+      stroke_color: String(style.stroke_color || ""),
+      stroke_width: Number(style.stroke_width || 0),
+      line_style: String(style.line_style || ""),
+    }))
+    // Deleted edges drop their style; a new local edge's style is keyed by its client id
+    // (the server maps it through edge_id_map) only while that edge is still being created.
+    .filter(
+      (x) =>
+        x.fabric_edge_id &&
+        !deleteSet.has(x.fabric_edge_id) &&
+        (!isLocalPendingEdgeId(x.fabric_edge_id) || createSet.has(x.fabric_edge_id)),
+    );
+
+  return {
+    edge_creates,
+    edge_deletes: [...deleteSet],
+    edge_port_edits,
+    edge_styles,
+    node_adds,
+    node_removes,
+    positions: input.positions,
+  };
+}

web/src/i18n/locales/en/topology.ts

@@ -115,9 +115,12 @@ const topology = {
   save: "Save",
   saveDirty: "Save *",
   unsavedConfirm: "You have unsaved changes. Discard and switch maps?",
+  unsavedSaveBeforeAdd: "You have unsaved changes. Save and continue adding?",
   saving: "Saving…",
   saved: "Topology saved",
+  savedLockedSkipped: "Topology saved ({{count}} locked node(s) skipped)",
   saveFailed: "Save failed: {{detail}}",
+  renameNodeClearHint: "Leave empty to follow the device name",
   readOnlyBanner: "Read-only (ne:write scope required to edit)",
   readOnlyHint: "Read-only — no write permission",
   discoverTimeout: "Discovery timed out; check LLDP tasks for progress",

web/src/i18n/locales/zh/topology.ts

@@ -112,9 +112,12 @@ const topology = {
   save: "保存",
   saveDirty: "保存 *",
   unsavedConfirm: "有未保存的更改，确定丢弃并切换吗？",
+  unsavedSaveBeforeAdd: "当前有未保存修改，保存后继续添加？",
   saving: "保存中…",
   saved: "拓扑已保存",
+  savedLockedSkipped: "拓扑已保存（{{count}} 个锁定节点未移动）",
   saveFailed: "保存失败：{{detail}}",
+  renameNodeClearHint: "留空则恢复跟随设备名",
   readOnlyBanner: "只读模式（需要 ne:write 权限才能编辑）",
   readOnlyHint: "只读模式，无编辑权限",
   discoverTimeout: "发现任务超时，请稍后在 LLDP 任务页查看进度",

web/src/services/api/topology.ts

@@ -132,6 +132,14 @@ export const deleteTopologyView = (viewId: string, force = false) =>
     `/v1/topology/views/${encodeURIComponent(viewId)}?force=${force ? "true" : "false"}`,
   );
 
+export type TopologyPositionsMutation = {
+  ok?: boolean;
+  skipped_locked?: number;
+  updated?: number;
+  matched?: number;
+  graph?: TopologyViewGraph | null;
+};
+
 export const patchTopologyPositions = (
   viewId: string,
   positions: Array<{
@@ -141,10 +149,17 @@ export const patchTopologyPositions = (
     label?: string;
     locked?: boolean;
   }>,
-) =>
-  apiPatch<TopologyViewGraph>(`/v1/topology/views/${encodeURIComponent(viewId)}/positions`, {
-    positions,
-  });
+  opts?: { return_graph?: boolean },
+) => {
+  const returnGraph = opts?.return_graph !== false;
+  return apiPatch<TopologyViewGraph | TopologyPositionsMutation>(
+    `/v1/topology/views/${encodeURIComponent(viewId)}/positions`,
+    {
+      positions,
+      return_graph: returnGraph,
+    },
+  );
+};
 
 export const addTopologyViewNodes = (
   viewId: string,
@@ -401,6 +416,62 @@ export const deleteFabricEdge = (edgeId: string) =>
     `/v1/topology/fabric/edges/${encodeURIComponent(edgeId)}`,
   );
 
+export const patchFabricEdgePorts = (
+  edgeId: string,
+  body: { a_port?: string; b_port?: string },
+) =>
+  apiPatch<{
+    id: string;
+    a_node_id: string;
+    b_node_id: string;
+    a_port: string;
+    b_port: string;
+    source: string;
+    status: string;
+    layer: string;
+  }>(`/v1/topology/fabric/edges/${encodeURIComponent(edgeId)}`, body);
+
+export type TopologyViewCommitBody = {
+  edge_creates?: Array<{
+    client_id?: string;
+    a_node_id: string;
+    b_node_id: string;
+    a_port?: string;
+    b_port?: string;
+  }>;
+  edge_deletes?: string[];
+  edge_port_edits?: Array<{ id: string; a_port?: string; b_port?: string }>;
+  edge_styles?: Array<{
+    fabric_edge_id: string;
+    stroke_color?: string;
+    stroke_width?: number;
+    line_style?: string;
+  }>;
+  node_adds?: string[];
+  node_removes?: string[];
+  positions?: Array<{
+    fabric_node_id: string;
+    x?: number;
+    y?: number;
+    label?: string;
+    locked?: boolean;
+  }>;
+};
+
+export type TopologyViewCommitResult = {
+  ok: boolean;
+  view_id: string;
+  edge_id_map: Record<string, string>;
+  skipped_locked: number;
+  graph: TopologyViewGraph | null;
+};
+
+export const commitTopologyView = (viewId: string, body: TopologyViewCommitBody) =>
+  apiPost<TopologyViewCommitResult>(
+    `/v1/topology/views/${encodeURIComponent(viewId)}/commit`,
+    body,
+  );
+
 /** Back-compat aliases used by older call sites during cutover. */
 export const fetchTopologyMaps = fetchTopologyViews;
 export const createTopologyMap = createTopologyView;

web/src/styles/pages/topology.css

@@ -3086,6 +3086,22 @@
   opacity: 0.92;
 }
 
+.topo-node__lock {
+  position: absolute;
+  top: -4px;
+  left: -6px;
+  z-index: 2;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 14px;
+  height: 14px;
+  border-radius: 999px;
+  background: color-mix(in srgb, var(--nx-surface-2) 82%, #94a3b8 18%);
+  border: 1px solid rgb(var(--nx-ink-rgb) / 0.28);
+  color: var(--nx-text-muted);
+  pointer-events: none;
+}
 .topo-node__badge {
   position: absolute;
   top: -4px;

web/src/types/topology.ts

@@ -115,6 +115,8 @@ export type TopologyViewNodeItem = {
   managed_ne_id: string;
   ume_ne_id: string;
   label: string;
+  /** Raw placement override; empty means follow device name/ip. */
+  label_override?: string;
   x: number;
   y: number;
   locked: boolean;

web/tests/topologySaveDiff.test.mjs

@@ -0,0 +1,116 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { buildViewCommitBody, isRegionNodeId } from "../src/features/topology/lib/saveDiff.ts";
+
+test("local add/remove nodes; region nodes stay out of add/remove lists", () => {
+  const body = buildViewCommitBody({
+    nodes: [
+      { id: "fab-a" },
+      { id: "fab-new" },
+      { id: "region:x", data: { kind: "region" } },
+    ],
+    edges: [],
+    serverNodeIds: ["fab-a", "fab-gone", "region:y"],
+    positions: [
+      { fabric_node_id: "fab-a", x: 1, y: 2 },
+      { fabric_node_id: "fab-new", x: 3, y: 4 },
+      { fabric_node_id: "region:x", x: 5, y: 6 },
+    ],
+    pendingCreates: [],
+    pendingDeletes: [],
+  });
+  assert.deepEqual(body.node_adds, ["fab-new"]);
+  assert.deepEqual(body.node_removes, ["fab-gone"]);
+  assert.ok(!body.node_adds.some(isRegionNodeId));
+  assert.ok(!body.node_removes.some(isRegionNodeId));
+  assert.equal(body.positions.length, 3);
+});
+
+test("only changed label overrides appear in positions payload from caller", () => {
+  const body = buildViewCommitBody({
+    nodes: [{ id: "fab-a" }],
+    edges: [],
+    serverNodeIds: ["fab-a"],
+    positions: [{ fabric_node_id: "fab-a", x: 1, y: 2, label: "CUSTOM" }],
+    pendingCreates: [],
+    pendingDeletes: [],
+  });
+  assert.equal(body.positions[0].label, "CUSTOM");
+});
+
+test("deleted then re-created edge is not in edge_deletes", () => {
+  const body = buildViewCommitBody({
+    nodes: [{ id: "a" }, { id: "b" }],
+    edges: [
+      {
+        id: "local:1",
+        source: "a",
+        target: "b",
+        data: { source_port: "gi0/1", target_port: "gi0/2" },
+      },
+    ],
+    serverNodeIds: ["a", "b"],
+    positions: [],
+    pendingCreates: ["local:1"],
+    pendingDeletes: ["edge-server-1", "local:1"],
+  });
+  assert.deepEqual(body.edge_deletes, ["edge-server-1"]);
+  assert.equal(body.edge_creates.length, 1);
+  assert.equal(body.edge_creates[0].client_id, "local:1");
+  assert.equal(body.edge_creates[0].a_port, "gi0/1");
+});
+
+test("undo after delete removes edge from edge_deletes when not pending", () => {
+  const body = buildViewCommitBody({
+    nodes: [{ id: "a" }, { id: "b" }],
+    edges: [{ id: "edge-server-1", source: "a", target: "b" }],
+    serverNodeIds: ["a", "b"],
+    positions: [],
+    pendingCreates: [],
+    pendingDeletes: [],
+  });
+  assert.deepEqual(body.edge_deletes, []);
+  assert.deepEqual(body.edge_creates, []);
+});
+
+test("styled or port-edited edge that is then deleted only appears in edge_deletes", () => {
+  const style = { stroke_color: "#ff0000", stroke_width: 2, line_style: "dashed" };
+  const body = buildViewCommitBody({
+    nodes: [{ id: "a" }, { id: "b" }],
+    edges: [],
+    serverNodeIds: ["a", "b"],
+    positions: [],
+    pendingCreates: [],
+    pendingDeletes: ["edge-1"],
+    pendingPortEdits: [["edge-1", { a_port: "gi0/1", b_port: "gi0/2" }]],
+    pendingStyles: [["edge-1", style]],
+  });
+  assert.deepEqual(body.edge_deletes, ["edge-1"]);
+  assert.deepEqual(body.edge_port_edits, []);
+  assert.deepEqual(body.edge_styles, []);
+});
+
+test("style on a new local edge is sent under its client id; dropped once the edge is gone", () => {
+  const style = { stroke_color: "#00ff00", stroke_width: 3, line_style: "" };
+  const edges = [{ id: "local:9", source: "a", target: "b", data: {} }];
+  const kept = buildViewCommitBody({
+    nodes: [{ id: "a" }, { id: "b" }],
+    edges,
+    serverNodeIds: ["a", "b"],
+    positions: [],
+    pendingCreates: ["local:9"],
+    pendingDeletes: [],
+    pendingStyles: [["local:9", style]],
+  });
+  assert.deepEqual(kept.edge_styles.map((s) => s.fabric_edge_id), ["local:9"]);
+  const dropped = buildViewCommitBody({
+    nodes: [{ id: "a" }, { id: "b" }],
+    edges: [],
+    serverNodeIds: ["a", "b"],
+    positions: [],
+    pendingCreates: [],
+    pendingDeletes: [],
+    pendingStyles: [["local:9", style]],
+  });
+  assert.deepEqual(dropped.edge_styles, []);
+});