fix(config): discard drafts without reloading

src/features/config/ConfigPage.tsx

@@ -277,11 +277,7 @@ export function ConfigPage() {
         ) : (
           <SourceSearchBar search={sourceSearch} disabled={disableControls || doc.loading} />
         )}
-        <ModeSwitch
-          mode={mode}
-          disabled={doc.saving || doc.loading}
-          onChange={handleModeChange}
-        />
+        <ModeSwitch mode={mode} disabled={doc.saving || doc.loading} onChange={handleModeChange} />
       </div>
 
       {mode === 'visual' ? (
@@ -322,7 +318,7 @@ export function ConfigPage() {
         saveDisabled={saveDisabled}
         discardDisabled={doc.loading || doc.saving}
         onSave={doc.handleSave}
-        onDiscard={doc.handleReload}
+        onDiscard={doc.handleDiscard}
       />
 
       <DiffModal

src/features/config/hooks/useConfigDocument.ts

@@ -277,6 +277,27 @@ export function useConfigDocument({
     });
   }, [isDirty, loadConfig, showConfirmation, t]);
 
+  /** 无需联网，直接恢复最近一次成功读取的原始服务端 YAML。 */
+  const handleDiscard = useCallback(() => {
+    if (!isDirty) return;
+
+    showConfirmation({
+      title: t('common.unsaved_changes_title'),
+      message: t('config_management.discard_confirm_message'),
+      confirmText: t('config_management.actions.discard'),
+      cancelText: t('common.cancel'),
+      variant: 'danger',
+      onConfirm: () => {
+        setContent(previewServerYaml);
+        setDirty(false);
+        setDiffModalOpen(false);
+        setServerYaml(previewServerYaml);
+        setMergedYaml(previewServerYaml);
+        loadVisualValuesFromYaml(previewServerYaml);
+      },
+    });
+  }, [isDirty, loadVisualValuesFromYaml, previewServerYaml, showConfirmation, t]);
+
   const closeDiff = useCallback(() => setDiffModalOpen(false), []);
 
   return {
@@ -297,6 +318,7 @@ export function useConfigDocument({
     handleConfirmSave,
     handleChange,
     handleReload,
+    handleDiscard,
     closeDiff,
   };
 }

src/i18n/locales/en.json

@@ -840,6 +840,7 @@
       "discard": "Discard changes",
       "save": "Save changes"
     },
+    "discard_confirm_message": "Discard all unsaved changes and restore the last server version?",
     "mode": {
       "label": "Editor mode",
       "visual": "Visual",

src/i18n/locales/ru.json

@@ -827,6 +827,7 @@
       "discard": "Отменить изменения",
       "save": "Сохранить изменения"
     },
+    "discard_confirm_message": "Отменить все несохранённые изменения и восстановить последнюю версию с сервера?",
     "mode": {
       "label": "Режим редактора",
       "visual": "Визуальный",

src/i18n/locales/zh-CN.json

@@ -840,6 +840,7 @@
       "discard": "放弃更改",
       "save": "保存更改"
     },
+    "discard_confirm_message": "确定放弃所有未保存的更改并恢复到最近的服务器版本吗？",
     "mode": {
       "label": "编辑模式",
       "visual": "可视化",

src/i18n/locales/zh-TW.json

@@ -866,6 +866,7 @@
       "discard": "放棄變更",
       "save": "儲存變更"
     },
+    "discard_confirm_message": "確定放棄所有未儲存的變更並還原到最近的伺服器版本嗎？",
     "mode": {
       "label": "編輯模式",
       "visual": "視覺化",