[aide] impl: 流程设计完成，进入实现环节

.aide/flow-status.json

@@ -1,7 +1,7 @@
 {
   "task_id": "2025-12-15T21-48-00",
   "current_phase": "flow-design",
-  "current_step": 3,
+  "current_step": 4,
   "started_at": "2025-12-15T21:48:00+08:00",
   "history": [
     {
@@ -27,6 +27,14 @@
       "step": 3,
       "summary": "进入流程设计环节",
       "git_commit": "ebecb61271366e2920a97e2ec628dfb5df9f785d"
+    },
+    {
+      "timestamp": "2025-12-15T21:50:05+08:00",
+      "action": "next-step",
+      "phase": "flow-design",
+      "step": 4,
+      "summary": "流程图设计完成",
+      "git_commit": "a18d89793ec12b77982cceab670d531e5d129e7d"
     }
   ]
 }

.aide/flow-status.lock

@@ -1 +1 @@
-21457
+21582