feat: add one-click git sync button

Combine fetch, pull with rebase, and push into one sync action
Keep remote dropdown focused on safe fetch actions
Block sync when uncommitted changes would conflict with rebase

packages/ui/src/components/views/git/GitHeader.tsx

@@ -26,7 +26,7 @@ import { SyncActions } from './SyncActions';
 import type { GitStatus, GitIdentityProfile, GitRemote } from '@/lib/api/types';
 import { useI18n } from '@/lib/i18n';
 
-type SyncAction = 'fetch' | 'pull' | 'push' | null;
+type SyncAction = 'fetch' | 'pull' | 'push' | 'sync' | null;
 
 interface GitHeaderProps {
   status: GitStatus | null;
@@ -36,8 +36,7 @@ interface GitHeaderProps {
   syncAction: SyncAction;
   remotes: GitRemote[];
   onFetch: (remote: GitRemote) => void;
-  onPull: (remote: GitRemote) => void;
-  onPush: () => void;
+  onSync: (remote: GitRemote) => void;
   onRemoveRemote: (remote: GitRemote) => void;
   removingRemoteName: string | null;
   onCheckoutBranch: (branch: string) => void;
@@ -195,8 +194,7 @@ export const GitHeader: React.FC<GitHeaderProps> = ({
   syncAction,
   remotes,
   onFetch,
-  onPull,
-  onPush,
+  onSync,
   onRemoveRemote,
   removingRemoteName,
   onCheckoutBranch,
@@ -239,8 +237,7 @@ export const GitHeader: React.FC<GitHeaderProps> = ({
       syncAction={syncAction}
       remotes={remotes}
       onFetch={onFetch}
-      onPull={onPull}
-      onPush={onPush}
+      onSync={onSync}
       onRemoveRemote={onRemoveRemote}
       removingRemoteName={removingRemoteName}
       disabled={!status}
@@ -248,6 +245,8 @@ export const GitHeader: React.FC<GitHeaderProps> = ({
 
       aheadCount={status.ahead}
       behindCount={status.behind}
+      trackingRemoteName={status.tracking?.split('/')[0]}
+      hasUncommittedChanges={(status.files?.length ?? 0) > 0}
     />
   );