fix: make multica workflow path deterministic

backend-fastapi/ai_platform/fixtures/multica_org_agents.json

@@ -80,7 +80,7 @@
           "initialized": false,
           "position": {
             "x": 160,
-            "y": -150
+            "y": 0
           },
           "data": {
             "label": "需求分析",
@@ -95,8 +95,8 @@
           "type": "template",
           "initialized": false,
           "position": {
-            "x": 160,
-            "y": 70
+            "x": 500,
+            "y": 0
           },
           "data": {
             "label": "架构方案",
@@ -111,8 +111,8 @@
           "type": "parallel",
           "initialized": false,
           "position": {
-            "x": 520,
-            "y": -40
+            "x": 840,
+            "y": 0
           },
           "data": {
             "label": "并行实现分派",
@@ -299,31 +299,14 @@
           "deletable": true
         },
         {
-          "id": "pm_triage-architecture_plan",
-          "type": "addButton",
-          "source": "pm_triage",
-          "target": "architecture_plan",
-          "data": {
-            "label": "澄清后设计方案"
-          },
-          "label": "澄清后设计方案",
-          "animated": false,
-          "style": {
-            "strokeWidth": 2,
-            "stroke": "#94a3b8"
-          },
-          "markerEnd": "arrowclosed",
-          "deletable": true
-        },
-        {
-          "id": "requirements_analysis-parallel_delivery",
+          "id": "requirements_analysis-architecture_plan",
           "type": "addButton",
           "source": "requirements_analysis",
-          "target": "parallel_delivery",
+          "target": "architecture_plan",
           "data": {
-            "label": "需求输入"
+            "label": "需求输入架构"
           },
-          "label": "需求输入",
+          "label": "需求输入架构",
           "animated": false,
           "style": {
             "strokeWidth": 2,
@@ -353,6 +336,7 @@
           "id": "parallel_delivery-frontend_delivery",
           "type": "addButton",
           "source": "parallel_delivery",
+          "sourceHandle": "frontend",
           "target": "frontend_delivery",
           "data": {
             "label": "前端分支"
@@ -370,6 +354,7 @@
           "id": "parallel_delivery-backend_delivery",
           "type": "addButton",
           "source": "parallel_delivery",
+          "sourceHandle": "backend",
           "target": "backend_delivery",
           "data": {
             "label": "后端分支"
@@ -387,6 +372,7 @@
           "id": "parallel_delivery-ops_prepare",
           "type": "addButton",
           "source": "parallel_delivery",
+          "sourceHandle": "ops",
           "target": "ops_prepare",
           "data": {
             "label": "发布分支"