feat: add topology view mode with router icons and link-style edges

Canvas-global nodeViewMode (bubble/card/topology) can be set at create or via prefs; topology draws NE routers with straight blue center links and exposes router icon to agents.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/server/src/chat.ts

@@ -64,9 +64,10 @@ export function createChatHandler(ctx: ToolContext) {
 8. 固定坐标用 set_pinned 或 create_node 带 pos；不确定时 mindmap_get_schema。
 9. 节点属性：标题用 update_text；描述/多标签/多链接/图片URL/时间用 update_node_meta（patch）；边用 update_edge_meta 或 set_edge_label。
 10. 节点类型 stylePreset：default|card|title|decision|risk|note|muted（title 仅画布锚点，勿新建；card=新闻快照卡片，配图用 imageUrl、摘要用 note、来源用 links）。
-11. 同级排序用 reorder：优先 {"type":"reorder","nodeId":"...","order":10}；也可用 afterSiblingId（null=置顶）。
-12. 折叠 set_collapsed 会隐藏该节点主父链下的全部子孙并重新布局；展开后恢复。
-13. 问图：用 mindmap_query（neighbors|path|stats|orphans|missing_meta）；答完可用 mindmap_highlight 高亮路径；细节用 mindmap_get_node / mindmap_get_edge。禁止编造图中没有的事实。
+11. 节点图标 icon（create_node / update_node_meta.patch）：server|database|cloud|person|folder|doc|link|warning|check|star|gear|globe|router。拓扑排障图：建画布时可用 mindmap_create_canvas({ title, nodeViewMode:"topology" })，节点 icon:"router"；nodeViewMode 是画布全局偏好，也可事后 set_prefs 修改。
+12. 同级排序用 reorder：优先 {"type":"reorder","nodeId":"...","order":10}；也可用 afterSiblingId（null=置顶）。
+13. 折叠 set_collapsed 会隐藏该节点主父链下的全部子孙并重新布局；展开后恢复。
+14. 问图：用 mindmap_query（neighbors|path|stats|orphans|missing_meta）；答完可用 mindmap_highlight 高亮路径；细节用 mindmap_get_node / mindmap_get_edge。禁止编造图中没有的事实。
 
 当前空间上下文（摘要）：
 ${JSON.stringify(spatial, null, 0).slice(0, 6000)}

apps/server/src/create-server.ts

@@ -8,7 +8,7 @@ import { fileURLToPath } from "node:url";
 import type { Server } from "node:http";
 import { WebSocketServer, type WebSocket } from "ws";
 import { SqliteGraphStore } from "@mind-map/graph-store";
-import { coerceOpInput, OpSchema, type Op } from "@mind-map/shared";
+import { coerceOpInput, OpSchema, NodeViewModeSchema, type Op } from "@mind-map/shared";
 import { listSkins } from "@mind-map/dream-skin";
 import { GraphError } from "@mind-map/graph-core";
 import { z } from "zod";
@@ -163,8 +163,16 @@ export function startMindMapServer(
     const body = (await c.req.json().catch(() => ({}))) as {
       title?: string;
       rootText?: string;
+      nodeViewMode?: string;
+      prefs?: { nodeViewMode?: string };
     };
-    const g = store.createCanvas(body.title, body.rootText);
+    const viewRaw = body.nodeViewMode ?? body.prefs?.nodeViewMode;
+    const parsed = NodeViewModeSchema.safeParse(viewRaw);
+    const g = store.createCanvas(
+      body.title,
+      body.rootText,
+      parsed.success ? { nodeViewMode: parsed.data } : undefined,
+    );
     broadcast({ type: "canvas/created", canvasId: g.canvas.id });
     return c.json(clientCanvasPayload(store, g.canvas.id));
   });

apps/server/src/tools.ts

@@ -17,6 +17,8 @@ import {
   nodeFunction,
   OP_SCHEMA_DOC,
   OP_TYPES,
+  NodeIconSchema,
+  NodeViewModeSchema,
 } from "@mind-map/shared";
 import { hierarchyFingerprint, layout } from "@mind-map/layout-engine";
 
@@ -481,8 +483,10 @@ function estimateOverlaps(
   nodeViewMode: string,
   anchorId: string | null,
 ) {
-  const w = nodeViewMode === "card" ? 180 : 120;
-  const h = nodeViewMode === "card" ? 72 : 36;
+  const w =
+    nodeViewMode === "card" ? 180 : nodeViewMode === "topology" ? 88 : 120;
+  const h =
+    nodeViewMode === "card" ? 72 : nodeViewMode === "topology" ? 64 : 36;
   const ids = nodes
     .filter((n) => !n.deletedAt && n.id !== anchorId && positions[n.id])
     .map((n) => n.id);
@@ -770,11 +774,30 @@ export async function runTool(
         rawArgs.rootText != null && String(rawArgs.rootText).trim()
           ? String(rawArgs.rootText)
           : undefined;
-      const g = ctx.store.createCanvas(title, rootText);
+      const prefsArg =
+        rawArgs.prefs && typeof rawArgs.prefs === "object"
+          ? (rawArgs.prefs as Record<string, unknown>)
+          : undefined;
+      const viewParsed = NodeViewModeSchema.safeParse(
+        rawArgs.nodeViewMode ?? prefsArg?.nodeViewMode,
+      );
+      const g = ctx.store.createCanvas(
+        title,
+        rootText,
+        viewParsed.success ? { nodeViewMode: viewParsed.data } : undefined,
+      );
       return {
         ok: true,
-        canvas: { id: g.canvas.id, title: g.canvas.title, rev: g.canvas.rev },
-        hint: "Canvas is empty visually. Create top-level nodes with {type:'create_node', text:'...'} (omit parentId). Use parentId only when nesting under an existing visible node.",
+        canvas: {
+          id: g.canvas.id,
+          title: g.canvas.title,
+          rev: g.canvas.rev,
+          prefs: { nodeViewMode: g.canvas.prefs.nodeViewMode },
+        },
+        hint:
+          g.canvas.prefs.nodeViewMode === "topology"
+            ? "Topology canvas: create NE nodes with icon:'router'. Omit parentId for top-level. Prefer straight hierarchy/relation links."
+            : "Canvas is empty visually. Create top-level nodes with {type:'create_node', text:'...'} (omit parentId). Use parentId only when nesting under an existing visible node.",
       };
     }
 
@@ -1506,20 +1529,12 @@ export async function runTool(
           "edge_note",
           "all",
         ],
-        nodeIcons: [
-          "server",
-          "database",
-          "cloud",
-          "person",
-          "folder",
-          "doc",
-          "link",
-          "warning",
-          "check",
-          "star",
-          "gear",
-          "globe",
-        ],
+        nodeIcons: NodeIconSchema.options,
+        nodeViewModes: NodeViewModeSchema.options,
+        createCanvas: {
+          nodeViewMode:
+            "Optional on mindmap_create_canvas (canvas-global). Also changeable later via set_prefs.",
+        },
         edgeLineStyles: ["solid", "dashed", "dotted"],
         edgeDirections: ["forward", "both", "none"],
         getSubgraph: {