feat: CLI SUBSCRIBE/MONITOR streaming mode

- New pubsub.ts: startSubscribe/stopSubscribe/startMonitor/stopMonitor
- IPC: redis:subscribe, redis:unsubscribe, redis:monitor, redis:monitorStop
- Streaming messages pushed via webContents.send
- Preload: onSubscribeMessage/onMonitorMessage callbacks
- CliView: detect SUBSCRIBE/PSUBSCRIBE/MONITOR, switch to streaming mode
- Stop button with pulsing indicator (green=subscribe, yellow=monitor)
- Real-time message display with timestamps
- Auto-cleanup on unmount
- i18n keys (zh-CN + en)

electron/main/ipc-handlers.ts

@@ -239,4 +239,30 @@ export function registerIpcHandlers(): void {
   ipcMain.handle('redis:clearCommandLog', () => {
     redis.clearLog()
   })
+
+  // Pub/Sub
+  ipcMain.handle('redis:subscribe', async (_e, id: string, channels: string[], isPattern: boolean) => {
+    try {
+      redis.startSubscribe(id, channels, isPattern, _e.sender)
+      return { success: true }
+    } catch (err: any) {
+      return { success: false, error: err.message }
+    }
+  })
+  ipcMain.handle('redis:unsubscribe', async (_e, id: string) => {
+    redis.stopSubscribe(id)
+  })
+
+  // Monitor
+  ipcMain.handle('redis:monitor', async (_e, id: string) => {
+    try {
+      redis.startMonitor(id, _e.sender)
+      return { success: true }
+    } catch (err: any) {
+      return { success: false, error: err.message }
+    }
+  })
+  ipcMain.handle('redis:monitorStop', async (_e, id: string) => {
+    redis.stopMonitor(id)
+  })
 }