fix: persist sourceHandle/targetHandle so cluster edges survive reload

backend/app/db/database.py

@@ -32,6 +32,10 @@ async def init_db() -> None:
             await conn.exec_driver_sql("ALTER TABLE edges ADD COLUMN path_style TEXT")
         with suppress(Exception):
             await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN custom_icon TEXT")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE edges ADD COLUMN source_handle TEXT")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE edges ADD COLUMN target_handle TEXT")
 
 
 async def get_db() -> AsyncGenerator[AsyncSession, None]:

backend/app/db/models.py

@@ -58,6 +58,8 @@ class Edge(Base):
     speed: Mapped[str | None] = mapped_column(String)
     custom_color: Mapped[str | None] = mapped_column(String)
     path_style: Mapped[str | None] = mapped_column(String)
+    source_handle: Mapped[str | None] = mapped_column(String)
+    target_handle: Mapped[str | None] = mapped_column(String)
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
 
 

backend/app/schemas/canvas.py

@@ -36,6 +36,8 @@ class EdgeSave(BaseModel):
     speed: str | None = None
     custom_color: str | None = None
     path_style: str | None = None
+    source_handle: str | None = None
+    target_handle: str | None = None
 
 
 class CanvasSaveRequest(BaseModel):

backend/app/schemas/edges.py

@@ -12,6 +12,8 @@ class EdgeBase(BaseModel):
     speed: str | None = None
     custom_color: str | None = None
     path_style: str | None = None
+    source_handle: str | None = None
+    target_handle: str | None = None
 
 
 class EdgeCreate(EdgeBase):
@@ -25,6 +27,8 @@ class EdgeUpdate(BaseModel):
     speed: str | None = None
     custom_color: str | None = None
     path_style: str | None = None
+    source_handle: str | None = None
+    target_handle: str | None = None
 
 
 class EdgeResponse(EdgeBase):

frontend/src/App.tsx

@@ -66,6 +66,8 @@ export default function App() {
         speed: e.data?.speed ?? null,
         custom_color: e.data?.custom_color ?? null,
         path_style: e.data?.path_style ?? null,
+        source_handle: e.sourceHandle ?? null,
+        target_handle: e.targetHandle ?? null,
       }))
       await canvasApi.save({ nodes: nodesToSave, edges: edgesToSave, viewport: {} })
       markSaved()
@@ -103,11 +105,13 @@ export default function App() {
               ...(n.type === 'proxmox' && n.container_mode !== false ? { width: 300, height: 200 } : {}),
             }
           })
-          const rfEdges = apiEdges.map((e: EdgeData & { id: string; source: string; target: string }) => ({
+          const rfEdges = apiEdges.map((e: EdgeData & { id: string; source: string; target: string; source_handle?: string; target_handle?: string }) => ({
             id: e.id,
             source: e.source,
             target: e.target,
             type: e.type,
+            sourceHandle: e.source_handle ?? null,
+            targetHandle: e.target_handle ?? null,
             data: e,
           }))
           loadCanvas(rfNodes, rfEdges)