feat(frontend): complete MCP plugin management UI

frontend/src/services/workspaceService.spec.ts

@@ -73,7 +73,7 @@ describe('workspaceService backend adapter', () => {
     const markdown = await workspaceService.readFileContent('/课程/操作系统.md')
     await workspaceService.saveFileContent('/课程/操作系统.md', '# 已更新\n')
 
-    expect(vault).toEqual({ path: 'C:\\data\\vault', name: 'vault' })
+    expect(vault).toEqual({ vault_id: 'default', path: 'C:\\data\\vault', name: 'vault' })
     expect(tree[0].children?.[0]).toMatchObject({
       id: 'note-os', note_id: 'note-os', path: '/课程/操作系统.md', type: 'file',
     })

frontend/src/services/workspaceService.ts

@@ -11,6 +11,7 @@ import * as noteService from './noteService'
 
 /** Web 联调只连接 AI Core 配置的单一 Vault；多 Vault 选择由 Tauri Host 接管。 */
 export interface VaultInfo {
+  vault_id: string
   path: string
   name: string
 }
@@ -81,13 +82,17 @@ export async function getWorkspaceInfo(): Promise<ApiWorkspaceInfo> {
 
 export async function getRecentVaults(): Promise<VaultInfo[]> {
   const workspace = await getWorkspaceInfo()
-  return [{ path: workspace.path, name: workspace.name }]
+  return [{ vault_id: workspace.vault_id, path: workspace.path, name: workspace.name }]
 }
 
 export async function openVault(path: string): Promise<VaultInfo> {
   const snapshot = await apiClient.post<ApiWorkspaceSnapshot>('/api/workspace/open', { path })
   cacheEntries(snapshot.items)
-  return { path: snapshot.workspace.path, name: snapshot.workspace.name }
+  return {
+    vault_id: snapshot.workspace.vault_id,
+    path: snapshot.workspace.path,
+    name: snapshot.workspace.name,
+  }
 }
 
 export async function createVault(path: string, name: string): Promise<VaultInfo> {
@@ -110,6 +115,11 @@ export async function readFileContent(filePath: string): Promise<string> {
   return note.markdown
 }
 
+/** Resolve the backend note identity already associated with a workspace path. */
+export async function getNoteId(filePath: string): Promise<string> {
+  return requireNoteId(filePath)
+}
+
 export async function saveFileContent(filePath: string, content: string): Promise<void> {
   await noteService.updateNote(await requireNoteId(filePath), { markdown: content })
 }