feat(storage): 统一二进制对象存储与公开错误

新增 Aliyun OSS 与 S3 协议、通道内重试和按优先级跨通道切换，保留 server-main 兼容与环境 OSS 内存通道。

将请求及结果中的 Base64、Data URI、Buffer、multipart 和内联二进制统一对象化，生产路径不再写入本机静态目录，历史本地资源仅保留只读兼容。

引入 PublicErrorV1 并统一 API、异步查询、兼容协议和失败回调的安全错误输出，同时补充迁移、管理端、指标、OpenAPI 与本地模拟验收。

验证：go test ./... -count=1；go vet ./...；pnpm lint；pnpm test；pnpm build；pnpm openapi；tests/ci/migrations-test.sh。

apps/web/src/App.tsx

@@ -111,6 +111,7 @@ import {
   updateClientCustomizationSettings,
   updateFileStorageChannel,
   updateFileStorageSettings,
+  testFileStorageChannel,
   updateGatewayUser,
   updatePlatform,
   updatePlatformDynamicPriority,
@@ -1182,6 +1183,22 @@ export function App() {
     }
   }
 
+  async function verifyFileStorageChannel(channelId: string) {
+    setCoreState('loading');
+    setCoreMessage('');
+    try {
+      const result = await testFileStorageChannel(token, channelId);
+      const refreshed = await listFileStorageChannels(token);
+      setFileStorageChannels(refreshed.items);
+      setCoreState('ready');
+      setCoreMessage(`对象存储连接测试通过，Put / Head / Delete 均成功，耗时 ${result.durationMs}ms。`);
+    } catch (err) {
+      setCoreState('error');
+      setCoreMessage(err instanceof Error ? err.message : '对象存储连接测试失败');
+      throw err;
+    }
+  }
+
   async function saveClientCustomizationSettings(input: ClientCustomizationSettingsUpdateRequest) {
     setCoreState('loading');
     setCoreMessage('');
@@ -1614,6 +1631,7 @@ export function App() {
             onSaveAccessRule={saveAccessRule}
             onSaveFileStorageChannel={saveFileStorageChannel}
             onSaveFileStorageSettings={saveFileStorageSettings}
+            onTestFileStorageChannel={verifyFileStorageChannel}
             onSaveClientCustomizationSettings={saveClientCustomizationSettings}
             onConnectSecurityEvents={connectSecurityEvents}
             onDisconnectSecurityEvents={disconnectSecurityEvents}