feat: Command Log dialog

- New commandLogger.ts: in-memory log (max 5000 entries)
- withLog() wrapper in ipc-handlers.ts for all write commands
- CommandLog.vue: table with time/command/duration, write-only filter
- IPC: redis:getCommandLog, redis:clearCommandLog
- Ctrl+G shortcut from Sidebar
- i18n keys (zh-CN + en)

electron/preload/index.ts

@@ -114,6 +114,11 @@ const electronAPI = {
       ipcRenderer.invoke('redis:ping', id),
     isConnected: (id: string): Promise<boolean> =>
       ipcRenderer.invoke('redis:isConnected', id),
+    // Command log
+    getCommandLog: (): Promise<any[]> =>
+      ipcRenderer.invoke('redis:getCommandLog'),
+    clearCommandLog: (): Promise<void> =>
+      ipcRenderer.invoke('redis:clearCommandLog'),
   },
 }