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

static/js/components/sidebar.js

@@ -49,7 +49,7 @@ const Sidebar = {
         this._gameListEl.innerHTML = '';
 
         if (!Array.isArray(games) || games.length === 0) {
-            this._gameListEl.innerHTML = '<div style="padding:8px 12px;color:var(--text-tertiary);font-size:12px;">暂无可用的游戏插件</div>';
+            this._gameListEl.innerHTML = '<div style="padding:8px 12px;color:var(--text-tertiary);font-size:12px;">' + Lang.t('noGamePlugins') + '</div>';
             return;
         }
 
@@ -77,7 +77,7 @@ const Sidebar = {
                 return;
             }
         }
-        this._gameLabelEl.textContent = '选择游戏';
+        this._gameLabelEl.textContent = Lang.t('selectGame');
     },
 
     async _selectGame(gameId) {