feat: 提交 task-045 至 task-058 收口产物

- 收口 rust final closure checklist，推进页面/块系统/Mindmap/CLI/AI tools 到最终 cutover 状态

- 按 ai-frontend-simplification-plan-v1 接入 Hermes bridge，合并 AI 面板并清理旧前端编排残留

- 补充 harness 任务与进度记录，加入 CLI smoke 夹具/脚本，并修正文档页 bridge SSR 自请求回退逻辑

rust/fixtures/task049-cli-smoke.json

@@ -0,0 +1,20 @@
+{
+  "workspaceId": "0e0e1304-9e8d-49ad-951b-3ae93a80fc85",
+  "searchQuery": "cli",
+  "pageTemplate": {
+    "title": "CLI Smoke",
+    "content": [
+      {
+        "id": "init_block",
+        "type": "paragraph",
+        "content": [
+          {
+            "type": "text",
+            "text": "hello cli"
+          }
+        ],
+        "children": []
+      }
+    ]
+  }
+}