chore: 收口 review 执行清单与 runtime 验证

- 补齐 design/10-review 执行清单、验收标准与相关设计治理记录

- 迁移已完成的 tree、mindmap、runtime fallback、AI kernel 等设计和缺陷条目

- 推进 Rust Web runtime、tree/sidebar、page aggregate、mindmap 与 OnlyOffice 路由侧验证支撑

- 增加 task177-task180 smoke/audit 脚本及前端相关测试覆盖

rust/crates/mnote-web/src/routes/search.rs

@@ -175,6 +175,8 @@ pub async fn documents(
                 "owner": "mnote-web",
                 "projectionOwner": result.get("projectionOwner").cloned().unwrap_or_else(|| json!("rust-kernel")),
                 "queryName": "search.documents.query",
+                "degraded": result.get("degraded").cloned().unwrap_or_else(|| json!(false)),
+                "degradedReason": result.get("degradedReason").cloned().unwrap_or(Value::Null),
                 "requestId": context.trace.request_id,
                 "traceId": context.trace.trace_id,
             },
@@ -239,12 +241,13 @@ async fn load_search_results_with_filters(
     .await
     {
         Ok(value) => Ok(value),
-        Err(_) => execute_runtime_query_against_data(
+        Err(_) if config.allow_dev_fixtures => execute_runtime_query_against_data(
             context,
             Some(workspace_id),
             runtime_query,
             fallback_search_dataset(workspace_id),
         ),
+        Err(error) => Ok(degraded_empty_search_projection(error.message())),
     }
 }
 
@@ -256,6 +259,16 @@ fn empty_search_projection() -> Value {
     })
 }
 
+fn degraded_empty_search_projection(reason: &str) -> Value {
+    json!({
+        "enqueueAssetIds": [],
+        "projectionOwner": "rust-kernel",
+        "results": [],
+        "degraded": true,
+        "degradedReason": reason,
+    })
+}
+
 fn fallback_search_dataset(workspace_id: &str) -> Value {
     json!({
         "documents": [
@@ -413,6 +426,8 @@ mod tests {
         assert!(html.contains("search.documents.query"));
         assert!(html.contains("search-result"));
         assert!(html.contains("Rust Web 搜索结果"));
+        assert!(html.contains("data-mnote-dev-fixture=\"true\""));
+        assert!(html.contains("data-mnote-dev-fixture-kind=\"sidebar-tree\""));
     }
 
     #[tokio::test]
@@ -467,4 +482,53 @@ mod tests {
         assert_eq!(payload["meta"]["projectionOwner"], "rust-kernel");
         assert_eq!(payload["projectionOwner"], "rust-kernel");
     }
+
+    #[tokio::test]
+    async fn search_documents_does_not_return_builtin_fixture_when_convex_unavailable() {
+        let app = build_app(AppState::new(AppConfig {
+            service_name: "mnote-web".into(),
+            service_version: "0.1.0".into(),
+            bind_addr: "127.0.0.1:0".into(),
+            public_bind_addr: "127.0.0.1:3000".into(),
+            legacy_next_base_url: Some("http://127.0.0.1:3100".into()),
+            enable_legacy_next_compat: true,
+            enable_debug_shell_routes: false,
+            hermes_base_path: "/api/hermes".into(),
+            compat_next_base_path: "/api/compat/next".into(),
+            convex_url: None,
+            convex_admin_key: None,
+            allow_dev_fixtures: false,
+            query_fixtures_json: None,
+            mutation_fixtures_json: None,
+            dev_user_id: "dev-user".into(),
+            dev_user_name: "开发用户".into(),
+            dev_user_email: "dev@mnote.local".into(),
+        }));
+        let response = app
+            .oneshot(
+                Request::builder()
+                    .method("POST")
+                    .uri("/api/search/documents")
+                    .header("content-type", "application/json")
+                    .body(Body::from(
+                        json!({
+                            "workspaceId": "ws_demo",
+                            "query": "Hermes"
+                        })
+                        .to_string(),
+                    ))
+                    .expect("request"),
+            )
+            .await
+            .expect("response");
+
+        assert_eq!(response.status(), StatusCode::OK);
+        let body = to_bytes(response.into_body(), usize::MAX)
+            .await
+            .expect("body");
+        let payload: Value = serde_json::from_slice(&body).expect("json");
+        assert_eq!(payload["results"], json!([]));
+        assert_eq!(payload["meta"]["degraded"], true);
+        assert!(!payload.to_string().contains("Hermes 技能知识图谱开发"));
+    }
 }