feat: full i18n support - all pages use Lang.t() for zh/en

static/js/components/topbar.js

@@ -8,15 +8,15 @@ const Topbar = {
             if (!WS.connected) {
                 WS._reconnectDelay = 500;
                 WS._connect();
-                Toast.show('正在重连...', 'info', 1500);
+                Toast.show(Lang.t('loading'), 'info', 1500);
             }
         });
 
         WS.on('status', (status) => {
             this._statusEl.className = `status-indicator ${status}`;
             this._statusEl.querySelector('.status-text').textContent =
-                status === 'connected' ? '已连接' :
-                status === 'error' ? '连接错误' : '未连接';
+                status === 'connected' ? Lang.t('connected') :
+                status === 'error' ? Lang.t('connectionError') : Lang.t('disconnected');
         });
 
         setInterval(() => this._refreshStatus(), 5000);
@@ -28,7 +28,7 @@ const Topbar = {
             const wsStatus = status.ws_clients > 0 ? 'connected' : 'disconnected';
             this._statusEl.className = `status-indicator ${wsStatus}`;
             this._statusEl.querySelector('.status-text').textContent =
-                wsStatus === 'connected' ? `已连接 (${status.ws_clients})` : '未连接';
+                wsStatus === 'connected' ? `${Lang.t('connected')} (${status.ws_clients})` : Lang.t('disconnected');
         } catch (e) { console.error(e); }
     }
 };