refactor: extract media upload runtime helper

design/03-rust-web/process/3-20-browser-runtime-followup-checklist-v1.md

@@ -93,3 +93,7 @@ UI / 浏览器可见项必须有真实浏览器截图或结构化 smoke 证据
   - 已验证：`node --check rust/crates/mnote-web/browser/document-conflict-panel-runtime.js`、`cargo fmt --manifest-path rust/Cargo.toml --all --check`、`cargo check --manifest-path rust/Cargo.toml -p mnote-web`、`cargo test --manifest-path rust/Cargo.toml -p mnote-web document_conflict_panel_runtime_contains_dom_helpers -- --test-threads=1`、`cargo test --manifest-path rust/Cargo.toml -p mnote-web mnote_browser_runtime_assets_are_explicitly_mounted -- --test-threads=1`。
   - 未完成：conflict merge / accept / keep 业务逻辑、document session lifecycle、secondary pane conflict smoke 仍未迁出；本轮未声称真实冲突 UI 全链路完成。
 - 2026-05-25：根据用户纠正，后续实现 worker 不能在主工作区直接修改；每批最多 2 个 worker，且必须采用独立 worktree 候选 patch或明确只读任务。Codex 读取 Hindsight recall、`process-handoff.md/json`、`result.json`、diff 与验证证据后再选择性合入。
+- 2026-05-25：Codex 主控完成非本地 media upload API 小切片：`local-upload-runtime.js` 新增并导出 `uploadMediaAsset(file, plan, context)`，承接 `/api/media/upload` 的 FormData 构造、fetch 和响应解析；`layout.rs` 的 `uploadFileToMediaAsset` 仍负责 appendUploadedAssetRow、editor 插入和 `wolai:assets-changed` 事件分发，并保留完整 inline fallback。
+  - 修改：`rust/crates/mnote-web/browser/local-upload-runtime.js`、`rust/crates/mnote-web/src/ssr/pages/layout.rs`。
+  - 已验证：`node --check rust/crates/mnote-web/browser/local-upload-runtime.js`、`cargo fmt --manifest-path rust/Cargo.toml --all --check`、`cargo check --manifest-path rust/Cargo.toml -p mnote-web`、`cargo test --manifest-path rust/Cargo.toml -p mnote-web local_upload_runtime_contains_editor_upload_context_helpers -- --test-threads=1`、`cargo test --manifest-path rust/Cargo.toml -p mnote-web sidebar_upload_runtime_routes_local_markdown_assets_to_local_folder -- --test-threads=1`、`node scripts/task479-local-folder-markdown-resource-lifecycle-smoke.js`。
+  - 未完成：`uploadFileToMediaAsset` / `uploadFilesWithResolvedTarget` 编排壳、conflict merge / accept / keep 业务逻辑、secondary pane conflict smoke 仍未迁出；本轮未改资源归属语义。

rust/crates/mnote-web/browser/local-upload-runtime.js

@@ -183,6 +183,26 @@ async function uploadLocalFolderAsset(file, plan, context) {
   };
 }
 
+async function uploadMediaAsset(file, plan, context) {
+  var form = new FormData();
+  form.append('file', file);
+  form.append('workspaceId', plan && plan.workspaceId || '');
+  form.append('documentId', plan && plan.targetDocumentId || '');
+  if (plan && plan.targetMindmapId) form.append('mindmapId', plan.targetMindmapId);
+  var response = await fetchWithTimeout('/api/media/upload', {
+    method: 'POST',
+    credentials: 'include',
+    body: form
+  }, Number(context && context.timeoutMs) || 15000, '上传');
+  var payload = await response.json().catch(function() { return null; });
+  if (!response.ok || !payload || !payload.asset) {
+    throw new Error(payload && payload.error ? payload.error : '上传失败');
+  }
+  return {
+    asset: payload.asset
+  };
+}
+
 async function insertUploadedAssetIntoEditor(asset, targetRoot, deps) {
   deps = deps || {};
   var editorRoot = targetRoot instanceof HTMLElement
@@ -408,6 +428,7 @@ window.__mnoteLocalUploadRuntime = {
   openEditorUploadFilePicker: openEditorUploadFilePicker,
   fetchWithTimeout: fetchWithTimeout,
   uploadLocalFolderAsset: uploadLocalFolderAsset,
+  uploadMediaAsset: uploadMediaAsset,
   insertUploadedAssetIntoEditor: insertUploadedAssetIntoEditor,
   localAssetOpenUrl: localAssetOpenUrl,
   uploadedAssetType: uploadedAssetType,

rust/crates/mnote-web/src/ssr/pages/layout.rs

@@ -4058,6 +4058,15 @@ const SIDEBAR_TREE_JS: &str = r##"
       }));
       return localPayload.asset;
     }
+    var mediaUploadRuntime = localUploadRuntimeFunction('uploadMediaAsset');
+    var payload = null;
+    if (mediaUploadRuntime) {
+      var mediaResult = await mediaUploadRuntime(file, plan, { timeoutMs: 15000 });
+      payload = mediaResult && mediaResult.asset ? { asset: mediaResult.asset } : null;
+      if (!payload || !payload.asset) {
+        throw new Error('上传失败');
+      }
+    } else {
       var form = new FormData();
       form.append('file', file);
       form.append('workspaceId', plan.workspaceId);
@@ -4068,10 +4077,11 @@ const SIDEBAR_TREE_JS: &str = r##"
         credentials: 'include',
         body: form
       }, 15000, '上传');
-    var payload = await response.json().catch(function() { return null; });
+      payload = await response.json().catch(function() { return null; });
       if (!response.ok || !payload || !payload.asset) {
         throw new Error(payload && payload.error ? payload.error : '上传失败');
       }
+    }
     appendUploadedAssetRow(payload.asset, plan.targetDocumentId);
     if (options && options.insertIntoEditor) {
       await insertUploadedAssetIntoEditor(payload.asset, editorRootFromUploadOptions(options));
@@ -10954,6 +10964,7 @@ mod tests {
         assert!(
             SIDEBAR_TREE_JS.contains("localUploadRuntimeFunction('insertUploadedAssetIntoEditor')")
         );
+        assert!(SIDEBAR_TREE_JS.contains("localUploadRuntimeFunction('uploadMediaAsset')"));
         assert!(SIDEBAR_TREE_JS.contains("__mnoteLastEditorUploadRoot"));
         assert!(SIDEBAR_TREE_JS.contains("data-pane-role=\"primary\""));
         assert!(SIDEBAR_TREE_JS.contains("insertUploadedAssetIntoEditor(localPayload.asset, editorRootFromUploadOptions(options))"));
@@ -10969,6 +10980,7 @@ mod tests {
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("function openEditorUploadFilePicker"));
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("function fetchWithTimeout"));
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("function uploadLocalFolderAsset"));
+        assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("function uploadMediaAsset"));
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("function insertUploadedAssetIntoEditor"));
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("data-mnote-last-upload-inserted"));
         assert!(LOCAL_UPLOAD_RUNTIME_JS.contains("uploadFilesWithResolvedTarget"));