fix: add toast feedback for OMO "Fill Recommended" button silent failures

src/i18n/locales/en.json

@@ -1840,6 +1840,10 @@
     "customCategories": "Custom Categories",
     "modelConfiguration": "Model Configuration",
     "fillRecommended": "Fill Recommended",
+    "fillRecommendedSuccess": "Filled {{count}} recommended models",
+    "fillRecommendedPartial": "Filled {{filled}} recommended models, {{unmatched}} unmatched",
+    "fillRecommendedAllSet": "All slots already have models configured",
+    "fillRecommendedNoMatch": "Recommended models not found in configured providers",
     "configSummary": "{{agents}} agents, {{categories}} categories configured · Click ⚙ for advanced params",
     "enabledModelsCount": "{{count}} configured models available",
     "source": "from:",

src/i18n/locales/ja.json

@@ -1840,6 +1840,10 @@
     "customCategories": "カスタムカテゴリ",
     "modelConfiguration": "モデル設定",
     "fillRecommended": "推奨を入力",
+    "fillRecommendedSuccess": "推奨モデル {{count}} 件を設定しました",
+    "fillRecommendedPartial": "推奨モデル {{filled}} 件を設定、{{unmatched}} 件は未一致",
+    "fillRecommendedAllSet": "すべてのスロットにモデルが設定済みです",
+    "fillRecommendedNoMatch": "推奨モデルが設定済みプロバイダーに見つかりませんでした",
     "configSummary": "{{agents}} 個の Agent、{{categories}} 個の Category を設定済み · ⚙ で詳細を展開",
     "enabledModelsCount": "設定済みモデル {{count}} 件",
     "source": "出典:",

src/i18n/locales/zh.json

@@ -1840,6 +1840,10 @@
     "customCategories": "自定义分类",
     "modelConfiguration": "模型配置",
     "fillRecommended": "填充推荐",
+    "fillRecommendedSuccess": "已填充 {{count}} 个推荐模型",
+    "fillRecommendedPartial": "已填充 {{filled}} 个推荐模型，{{unmatched}} 个未匹配",
+    "fillRecommendedAllSet": "所有槽位已有模型配置",
+    "fillRecommendedNoMatch": "推荐模型在已配置的供应商中未找到匹配",
     "configSummary": "已配置 {{agents}} 个 Agent，{{categories}} 个 Category · 点击 ⚙ 展开高级参数",
     "enabledModelsCount": "可选已配置模型 {{count}} 个",
     "source": "来源:",