fix: address code review — error-path tests, edge cases, UX improvements

web/src/api/workspaces.ts

@@ -52,10 +52,9 @@ export const workspacesApi = {
   release: (wtID: string) =>
     request<Worktree>(`/api/v1/worktrees/${enc(wtID)}/release`, { method: 'POST' }),
 
-  listBranches(wsID: string): Promise<string[]> {
-    return request<{ branches: string[] }>(`/api/v1/workspaces/${enc(wsID)}/branches`)
-      .then(r => r.branches)
-  },
+  listBranches: (wsID: string): Promise<string[]> =>
+    request<{ branches: string[] }>(`/api/v1/workspaces/${enc(wsID)}/branches`)
+      .then(r => r.branches),
 
   // ===== Git ops =====
   statusOnMain: (wsID: string) =>

web/src/views/workspaces/components/WorktreesTab.vue

@@ -36,6 +36,8 @@
             :options="baseBranchOptions"
             :loading="branchesLoading"
             clearable
+            filterable
+            tag
             placeholder="默认使用 default_branch"
           />
         </NFormItem>