fix: missing placeholder and error handling in override page

src/renderer/src/locales/en-US.json

@@ -498,10 +498,12 @@
   "rules.title": "Rules",
   "rules.filter": "Filter Rules",
   "override.title": "Override",
+  "override.input.placeholder": "Enter override URL",
   "override.import": "Import",
   "override.docs": "Documentation",
   "override.repository": "Override Repository",
   "override.unsupportedFileType": "Unsupported file type",
+  "override.error.importFailed": "Import failed: {{error}}",
   "override.actions.open": "Open",
   "override.actions.newYaml": "New YAML",
   "override.actions.newJs": "New JavaScript",

src/renderer/src/locales/fa-IR.json

@@ -467,10 +467,12 @@
   "rules.title": "قوانین",
   "rules.filter": "فیلتر قوانین",
   "override.title": "جایگزینی",
+  "override.input.placeholder": "وارد کردن URL جایگزین",
   "override.import": "وارد کردن",
   "override.docs": "مستندات",
   "override.repository": "مخزن جایگزینی",
   "override.unsupportedFileType": "نوع فایل پشتیبانی نمی‌شود",
+  "override.error.importFailed": "وارد کردن ناموفق بود: {{error}}",
   "override.actions.open": "باز کردن",
   "override.actions.newYaml": "YAML جدید",
   "override.actions.newJs": "جاوااسکریپت جدید",

src/renderer/src/locales/ru-RU.json

@@ -467,10 +467,12 @@
   "rules.title": "Правила",
   "rules.filter": "Фильтр правил",
   "override.title": "Переопределение",
+  "override.input.placeholder": "Введите URL переопределения",
   "override.import": "Импорт",
   "override.docs": "Документация",
   "override.repository": "Репозиторий переопределений",
   "override.unsupportedFileType": "Неподдерживаемый тип файла",
+  "override.error.importFailed": "Не удалось импортировать: {{error}}",
   "override.actions.open": "Открыть",
   "override.actions.newYaml": "Новый YAML",
   "override.actions.newJs": "Новый JavaScript",

src/renderer/src/locales/zh-CN.json

@@ -498,10 +498,12 @@
   "rules.title": "分流规则",
   "rules.filter": "筛选过滤",
   "override.title": "覆写",
+  "override.input.placeholder": "输入覆写 URL",
   "override.import": "导入",
   "override.docs": "使用文档",
   "override.repository": "常用覆写仓库",
   "override.unsupportedFileType": "不支持的文件类型",
+  "override.error.importFailed": "导入失败：{{error}}",
   "override.actions.open": "打开",
   "override.actions.newYaml": "新建 YAML",
   "override.actions.newJs": "新建 JavaScript",

src/renderer/src/locales/zh-TW.json

@@ -498,10 +498,12 @@
   "rules.title": "分流規則",
   "rules.filter": "篩選過濾",
   "override.title": "覆寫",
+  "override.input.placeholder": "輸入覆寫 URL",
   "override.import": "匯入",
   "override.docs": "使用文檔",
   "override.repository": "常用覆寫倉庫",
   "override.unsupportedFileType": "不支持的檔案類型",
+  "override.error.importFailed": "匯入失敗：{{error}}",
   "override.actions.open": "打開",
   "override.actions.newYaml": "新建 YAML",
   "override.actions.newJs": "新建 JavaScript",

src/renderer/src/pages/override.tsx

@@ -55,6 +55,8 @@ const Override: React.FC = () => {
         url,
         ext: urlObj.pathname.endsWith('.js') ? 'js' : 'yaml'
       })
+    } catch (e) {
+      toast.error(t('override.error.importFailed', { error: String(e) }))
     } finally {
       setImporting(false)
     }
@@ -174,6 +176,7 @@ const Override: React.FC = () => {
         <div className="flex p-2">
           <Input
             size="sm"
+            placeholder={t('override.input.placeholder')}
             value={url}
             onValueChange={setUrl}
             endContent={