feat: Add realtime git status updates via WebSocket

- Add file watcher on .git directory in terminal server
- Broadcast git-change events to connected clients
- Frontend auto-refreshes when changes detected
- Visual indicator shows realtime connection status

frontend/src/pages/GitPage.vue

@@ -1,7 +1,8 @@
 <script setup lang="ts">
-import { ref, computed, onMounted, watch } from 'vue'
+import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
 import { useGitApi } from '@/composables/git'
 import { DiffViewer, FileTree, CommitList, BranchSelector, ProjectTree, FileViewer } from '@/components/git'
+import { endpoints } from '@/config/endpoints'
 
 type TabName = 'status' | 'history' | 'compare' | 'files'
 
@@ -42,6 +43,63 @@ const compareHead = ref('')
 // Files tab state
 const selectedFilePath = ref<string | null>(null)
 
+// Realtime WebSocket connection
+let gitSocket: WebSocket | null = null
+const isRealtime = ref(false)
+
+function connectGitWatcher() {
+  if (gitSocket?.readyState === WebSocket.OPEN) return
+
+  gitSocket = new WebSocket(endpoints.terminal)
+
+  gitSocket.onopen = () => {
+    isRealtime.value = true
+    console.log('[Git] Realtime connected')
+  }
+
+  gitSocket.onmessage = (event) => {
+    try {
+      const msg = JSON.parse(event.data)
+      if (msg.type === 'git-change') {
+        console.log('[Git] Change detected, refreshing...')
+        refreshCurrentTab()
+      }
+    } catch {
+      // Ignore non-JSON messages
+    }
+  }
+
+  gitSocket.onclose = () => {
+    isRealtime.value = false
+    console.log('[Git] Realtime disconnected, reconnecting...')
+    setTimeout(connectGitWatcher, 2000)
+  }
+
+  gitSocket.onerror = () => {
+    isRealtime.value = false
+  }
+}
+
+function disconnectGitWatcher() {
+  if (gitSocket) {
+    gitSocket.close()
+    gitSocket = null
+  }
+}
+
+async function refreshCurrentTab() {
+  if (activeTab.value === 'status') {
+    await fetchStatus()
+    if (selectedFile.value) {
+      await fetchDiff({ file: selectedFile.value, staged: selectedStaged.value })
+    }
+  } else if (activeTab.value === 'history') {
+    await fetchLog(30)
+  } else if (activeTab.value === 'files') {
+    await fetchFileTree()
+  }
+}
+
 // Load initial data
 onMounted(async () => {
   await Promise.all([
@@ -51,6 +109,12 @@ onMounted(async () => {
   ])
   // Load initial diff
   await fetchDiff()
+  // Connect realtime watcher
+  connectGitWatcher()
+})
+
+onUnmounted(() => {
+  disconnectGitWatcher()
 })
 
 // Refresh when tab changes
@@ -143,11 +207,16 @@ const totalChanges = computed(() => {
     <aside class="sidebar">
       <div class="sidebar-header">
         <h2>Git</h2>
-        <button class="refresh-btn" @click="refresh" :disabled="loading" title="Refresh">
-          <svg :class="{ spinning: loading }" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-            <path d="M21 12a9 9 0 1 1-6.219-8.56" />
-          </svg>
-        </button>
+        <div class="header-actions">
+          <span :class="['realtime-indicator', { connected: isRealtime }]" :title="isRealtime ? 'Realtime: connected' : 'Realtime: disconnected'">
+            <svg width="8" height="8" viewBox="0 0 8 8"><circle cx="4" cy="4" r="4" fill="currentColor"/></svg>
+          </span>
+          <button class="refresh-btn" @click="refresh" :disabled="loading" title="Refresh">
+            <svg :class="{ spinning: loading }" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+              <path d="M21 12a9 9 0 1 1-6.219-8.56" />
+            </svg>
+          </button>
+        </div>
       </div>
 
       <div class="branch-info">
@@ -502,6 +571,29 @@ const totalChanges = computed(() => {
   margin: 0;
 }
 
+.header-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.realtime-indicator {
+  color: var(--text-muted);
+  opacity: 0.5;
+  transition: all 0.3s;
+}
+
+.realtime-indicator.connected {
+  color: #22c55e;
+  opacity: 1;
+  animation: pulse-glow 2s infinite;
+}
+
+@keyframes pulse-glow {
+  0%, 100% { filter: drop-shadow(0 0 2px currentColor); }
+  50% { filter: drop-shadow(0 0 6px currentColor); }
+}
+
 .refresh-btn {
   width: 28px;
   height: 28px;

server/services/terminal.ts

@@ -1,4 +1,6 @@
 import { spawn, type IPty } from '@skitee3000/bun-pty'
+import { watch, type FSWatcher } from 'fs'
+import { join } from 'path'
 import { PORT_TERMINAL, WORKING_DIR, SHELL, SHELL_ARGS, DEFAULT_SESSION_ID, MAX_BUFFER_LINES } from '../config'
 
 interface TerminalSession {
@@ -239,3 +241,66 @@ export function broadcastClaudeStatus(status: ClaudeStatus, tool?: string) {
 
   console.log(`[Terminal] Claude status broadcast: ${status}${tool ? ` (${tool})` : ''} → ${clientCount} clients`)
 }
+
+// Git watcher
+let gitWatcher: FSWatcher | null = null
+let gitDebounceTimer: Timer | null = null
+const GIT_DEBOUNCE_MS = 300
+
+function broadcastGitChange() {
+  const message = JSON.stringify({
+    type: 'git-change',
+    timestamp: Date.now()
+  })
+
+  let clientCount = 0
+  for (const [, session] of sessions) {
+    for (const ws of session.clients) {
+      try {
+        ws.send(message)
+        clientCount++
+      } catch {
+        // Client disconnected
+      }
+    }
+  }
+
+  if (clientCount > 0) {
+    console.log(`[Git] Change detected → ${clientCount} clients notified`)
+  }
+}
+
+export function startGitWatcher() {
+  const gitDir = join(WORKING_DIR, '.git')
+
+  try {
+    // Watch .git directory recursively
+    gitWatcher = watch(gitDir, { recursive: true }, (eventType, filename) => {
+      // Ignore some noisy files
+      if (filename?.includes('FETCH_HEAD') || filename?.includes('gc.log')) {
+        return
+      }
+
+      // Debounce to avoid flooding
+      if (gitDebounceTimer) {
+        clearTimeout(gitDebounceTimer)
+      }
+
+      gitDebounceTimer = setTimeout(() => {
+        broadcastGitChange()
+      }, GIT_DEBOUNCE_MS)
+    })
+
+    console.log(`[Git] Watching ${gitDir} for changes`)
+  } catch (e: any) {
+    console.error(`[Git] Failed to watch .git directory: ${e.message}`)
+  }
+}
+
+export function stopGitWatcher() {
+  if (gitWatcher) {
+    gitWatcher.close()
+    gitWatcher = null
+    console.log('[Git] Watcher stopped')
+  }
+}

server/terminal.ts

@@ -5,7 +5,7 @@
  * even when the main server restarts due to code changes.
  */
 
-import { startTerminalServer } from './services/terminal'
+import { startTerminalServer, startGitWatcher } from './services/terminal'
 import { WORKING_DIR } from './config'
 
 console.log('')
@@ -13,6 +13,7 @@ console.log('='.repeat(50))
 console.log('Terminal Server (Independent Process)')
 console.log(`  WebSocket: ws://localhost:4103`)
 console.log(`  Working Dir: ${WORKING_DIR}`)
+console.log(`  Git Watcher: enabled`)
 console.log('')
 console.log('This process is stable and won\'t restart')
 console.log('when the main server reloads.')
@@ -20,3 +21,4 @@ console.log('='.repeat(50))
 console.log('')
 
 startTerminalServer()
+startGitWatcher()