Add topology situational overlays and harden live sync.

Show connect/alarm/level on the canvas with display toggles, refresh overlay fields even on dirty edits, fix connect-test dots and create-place messaging, and deep-link node alarms into the network alarms page.

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

netx_api/topology_schemas.py

@@ -291,6 +291,9 @@ class ViewNodeOut(BaseModel):
     device_type: str = ""
     connect_status: str = ""
     managed_source: str = ""  # manual | ume_sync | lldp | topology | webcrt | …
+    # Fabric classify: smaller level = closer to external/WAN; role synced from floor(level).
+    level: float | None = None
+    role: str = ""
     # ne | region — region nodes drill into child UME canvases
     kind: str = "ne"
     folder_id: str = ""

netx_api/topology_views_graph.py

@@ -197,6 +197,8 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
             label = (fn.name or fn.ip or vn.fabric_node_id)[:256]
         connect_status = ""
         managed_source = ""
+        level: float | None = None
+        role = ""
         if fn is not None:
             mid = str(fn.managed_ne_id or "").strip()
             uid = str(fn.ume_ne_id or "").strip()
@@ -206,6 +208,8 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
                 managed_source = str(mne.source or "").strip()
             elif uid and uid in ume_by_id:
                 connect_status = ume_by_id[uid].connection_status or ""
+            level = fn.level
+            role = str(fn.role or "").strip()
         nodes_out.append(
             ViewNodeOut(
                 fabric_node_id=vn.fabric_node_id,
@@ -221,6 +225,8 @@ def get_view_graph(db: Session, view_id: str) -> TopologyViewGraphOut:
                 device_type=(fn.device_type if fn else "") or "",
                 connect_status=connect_status,
                 managed_source=managed_source,
+                level=level,
+                role=role,
             )
         )
     # Child regions without a placement row still appear (legacy / missed create).