feat(editor): add markdown presets, heading folding and external file refresh

frontend/src/services/editorCommandService.ts

@@ -9,6 +9,7 @@ export const editorCommandIds = [
   'editor.font-size', 'editor.insert-markdown', 'editor.import-note-properties',
   'editor.metadata.edit', 'editor.metadata.title', 'editor.metadata.tags',
   'editor.reference-link', 'editor.html', 'editor.undo', 'editor.redo',
+  'editor.heading.toggle-fold', 'editor.heading.fold-all', 'editor.heading.unfold-all',
 ] as const
 export type EditorCommandId = typeof editorCommandIds[number]
 export type CommandResult = { ok: true } | { ok: false; reason: 'unsupported' | 'unavailable' | 'invalid-params' | 'failed' }

frontend/src/services/noteService.ts

@@ -25,7 +25,7 @@ export async function createNote(data: {
 
 export async function updateNote(
   noteId: string,
-  data: { title?: string; markdown?: string; tags?: string[] }
+  data: { title?: string; markdown?: string; tags?: string[]; expected_content_hash?: string }
 ): Promise<ApiNote> {
   return apiClient.patch(`/api/notes/${noteId}`, data)
 }

frontend/src/services/themePackageService.ts

@@ -361,7 +361,7 @@ export const mockCommunityThemes: ThemeManifest[] = [
   {
     theme_id: 'ocean-blue',
     name: 'Ocean Blue',
-    version: '1.4.0',
+    version: '1.5.0',
     author: 'community',
     description: '宁静的海洋蓝色主题，适合长时间阅读',
     min_app_version: '0.2.0',
@@ -373,7 +373,7 @@ export const mockCommunityThemes: ThemeManifest[] = [
   {
     theme_id: 'midnight-purple',
     name: 'Midnight Purple',
-    version: '2.2.0',
+    version: '2.3.0',
     author: 'night-owl',
     description: '深紫色暗夜主题，适合编码',
     min_app_version: '0.2.0',

frontend/src/services/workspaceService.ts

@@ -19,6 +19,7 @@ export interface VaultInfo {
 }
 
 let cachedTree: FileNode[] | null = null
+let treeRequestVersion = 0
 const noteIdByPath = new Map<string, string>()
 const typeByPath = new Map<string, FileNode['type']>()
 
@@ -88,6 +89,7 @@ export async function getRecentVaults(): Promise<VaultInfo[]> {
 }
 
 export async function openVault(path: string): Promise<VaultInfo> {
+  treeRequestVersion++
   const snapshot = await apiClient.post<ApiWorkspaceSnapshot>('/api/workspace/open', { path }, { timeoutMs: 15000 })
   cacheEntries(snapshot.items)
   return {
@@ -104,7 +106,9 @@ export async function createVault(path: string, name: string): Promise<VaultInfo
 }
 
 export async function refreshTree(): Promise<FileNode[]> {
-  const entries = await apiClient.get<ApiWorkspaceEntry[]>('/api/workspace/tree')
+  const version = ++treeRequestVersion
+  const entries = await apiClient.get<ApiWorkspaceEntry[]>('/api/workspace/tree', { timeoutMs: 10000 })
+  if (version !== treeRequestVersion) return cachedTree ?? []
   return cacheEntries(entries)
 }
 
@@ -122,10 +126,12 @@ export async function getNoteId(filePath: string): Promise<string> {
   return requireNoteId(filePath)
 }
 
-export async function saveFileContent(filePath: string, content: string): Promise<void> {
+export async function saveFileContent(filePath: string, content: string, expectedContent?: string): Promise<void> {
   const metadata = splitNoteMetadata(content)
+  const expectedHash = expectedContent === undefined ? undefined : Array.from(new Uint8Array(await crypto.subtle.digest('SHA-256', new TextEncoder().encode(expectedContent)))).map(byte => byte.toString(16).padStart(2, '0')).join('')
   await noteService.updateNote(await requireNoteId(filePath), {
     markdown: content,
+    ...(expectedHash ? { expected_content_hash: expectedHash } : {}),
     // Explicit [] clears the index; absent tags retain API-managed tags.
     ...(metadata?.hasTags ? { tags: metadata.tags } : {}),
   })