refactor: externalize filetree runtime helpers

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

@@ -102,6 +102,14 @@ pub fn build_router(state: AppState) -> Router {
             "/api/mnote-browser-runtime/local-upload-runtime.js",
             get(web_shell::local_upload_runtime_asset),
         )
+        .route(
+            "/api/mnote-browser-runtime/filetree-runtime.js",
+            get(web_shell::filetree_runtime_asset),
+        )
+        .route(
+            "/api/mnote-browser-runtime/filetree-context-menu-runtime.js",
+            get(web_shell::filetree_context_menu_runtime_asset),
+        )
         .route(
             "/api/mnote-browser-runtime/tree-live-controller.js",
             get(web_shell::tree_live_controller_runtime_asset),
@@ -508,6 +516,42 @@ mod tests {
         }
     }
 
+    #[tokio::test]
+    async fn mnote_browser_runtime_assets_are_explicitly_mounted() {
+        for path in [
+            "/api/mnote-browser-runtime/resource-open-runtime.js",
+            "/api/mnote-browser-runtime/local-upload-runtime.js",
+            "/api/mnote-browser-runtime/filetree-runtime.js",
+            "/api/mnote-browser-runtime/filetree-context-menu-runtime.js",
+            "/api/mnote-browser-runtime/tree-live-controller.js",
+            "/api/mnote-browser-runtime/tree-shell-runtime.js",
+        ] {
+            let response = app(false)
+                .oneshot(
+                    Request::builder()
+                        .uri(path)
+                        .body(Body::empty())
+                        .expect("request"),
+                )
+                .await
+                .expect("response");
+            assert_eq!(
+                response.status(),
+                StatusCode::OK,
+                "{path} 应返回 runtime asset"
+            );
+            let content_type = response
+                .headers()
+                .get(axum::http::header::CONTENT_TYPE)
+                .and_then(|value| value.to_str().ok())
+                .unwrap_or("");
+            assert!(
+                content_type.starts_with("application/javascript"),
+                "{path} 应声明 JavaScript content-type"
+            );
+        }
+    }
+
     #[tokio::test]
     async fn dev_hot_reload_endpoint_is_mounted() {
         let response = app(false)