feat(ui): show env mode persistence status and document writeback

webui/src/features/account/AccountManagerContainer.jsx

@@ -64,6 +64,27 @@ export default function AccountManagerContainer({ config, onRefresh, onMessage,
 
     return (
         <div className="space-y-6">
+            {Boolean(config?.env_source_present) && (
+                <div className={`rounded-xl border px-4 py-3 text-sm ${
+                    config?.env_writeback_enabled
+                        ? (config?.env_backed ? 'border-amber-500/30 bg-amber-500/10 text-amber-600' : 'border-emerald-500/30 bg-emerald-500/10 text-emerald-600')
+                        : 'border-amber-500/30 bg-amber-500/10 text-amber-600'
+                }`}>
+                    <p className="font-medium">
+                        {config?.env_writeback_enabled
+                            ? (config?.env_backed
+                                ? t('accountManager.envModeWritebackPendingTitle')
+                                : t('accountManager.envModeWritebackActiveTitle'))
+                            : t('accountManager.envModeRiskTitle')}
+                    </p>
+                    <p className="mt-1 text-xs opacity-90">
+                        {config?.env_writeback_enabled
+                            ? t('accountManager.envModeWritebackDesc', { path: config?.config_path || 'config.json' })
+                            : t('accountManager.envModeRiskDesc')}
+                    </p>
+                </div>
+            )}
+
             <QueueCards queueStatus={queueStatus} t={t} />
 
             <ApiKeysPanel

webui/src/locales/en.json

@@ -138,7 +138,12 @@
         "sessionCount": "Sessions: {count}",
         "deleteAllSessions": "Delete all sessions",
         "deleteAllSessionsConfirm": "Are you sure you want to delete all sessions for this account? This action cannot be undone.",
-        "deleteAllSessionsSuccess": "Successfully deleted all sessions"
+        "deleteAllSessionsSuccess": "Successfully deleted all sessions",
+        "envModeRiskTitle": "Environment-variable config mode detected (persistence risk)",
+        "envModeRiskDesc": "Detected DS2API_CONFIG_JSON/CONFIG_JSON. If DS2API_ENV_WRITEBACK is not enabled, Admin UI edits are in-memory only and may be lost after restart.",
+        "envModeWritebackPendingTitle": "Env mode + auto-persistence enabled (pending file handoff)",
+        "envModeWritebackActiveTitle": "Env mode + auto-persistence active",
+        "envModeWritebackDesc": "The app will auto-create/write the config file and transition to file-backed mode. Current persistence path: {path}"
     },
     "apiTester": {
         "defaultMessage": "Hello, please introduce yourself in one sentence.",

webui/src/locales/zh.json

@@ -138,7 +138,12 @@
         "sessionCount": "会话: {count}",
         "deleteAllSessions": "删除所有会话",
         "deleteAllSessionsConfirm": "确定要删除该账号的所有会话吗？此操作不可恢复。",
-        "deleteAllSessionsSuccess": "删除成功"
+        "deleteAllSessionsSuccess": "删除成功",
+        "envModeRiskTitle": "当前为环境变量配置模式（有持久化风险）",
+        "envModeRiskDesc": "检测到 DS2API_CONFIG_JSON/CONFIG_JSON。若未开启 DS2API_ENV_WRITEBACK，管理台改动仅在内存生效，重启可能丢失。",
+        "envModeWritebackPendingTitle": "环境变量模式 + 自动持久化已开启（等待落盘）",
+        "envModeWritebackActiveTitle": "环境变量模式 + 自动持久化已生效",
+        "envModeWritebackDesc": "程序会自动创建/写入配置文件并在后续切换为文件模式。当前持久化路径：{path}"
     },
     "apiTester": {
         "defaultMessage": "你好，请用一句话介绍你自己。",