feat(config): 运行时配置体系②——渠道配置落 channels.json + 面板落盘 + 热更新

- runtimeconfig/channels.go: channels.json 承载 map[platform][]ChannelAccount(token/baseURL/黑白名单/群聊限流), LoadChannels 优先文件/回退env, SaveChannels(0600+tmp原子写), Upsert/Delete/Masked脱敏
- channelbridge/reload.go: adapterManager 热替换——工厂重建新adapter先连接, 再原子断旧adapter(独立readCtx/进行中不中断); Bridge.Reload(platform) 逐账号增删
- 面板 PUT/DELETE /admin/channels/{platform}/config(owner+审计) 落盘channels.json+Reload热更新; GET /admin/channels 附账号掩码不泄裸token
- 前端 Channels.tsx 配置表单(id/token/baseURL/黑白名单/限流+config JSON)+保存热更新提示+掩码展示/删除
- .gitignore 加 channels.json; .env 退兜底(.env.example注明); token不打印/Config()脱敏
- channelbridge.go 拆 logic→reload.go(742→731); 全仓 go build/vet/test绿+前端build绿
- 未做真token端到端(需渠道凭据,不读.env)——如实标注待凭据

frontend/web/src/lib/api.ts

@@ -115,6 +115,14 @@ interface Envelope {
   error?: ApiErrorShape;
 }
 
+/** Result of saving/deleting a channel account config (persisted to channels.json). */
+export interface ChannelConfigSaveResult {
+  persisted: boolean;
+  path: string;
+  platform: string;
+  accountId: string;
+}
+
 async function request<T>(
   path: string,
   init: RequestInit = {}
@@ -491,6 +499,39 @@ export function adminChannelTest(req: {
 }): Promise<ChannelTestResult> {
   return request<ChannelTestResult>("/admin/channels/test", { method: "POST", body: JSON.stringify(req) });
 }
+/** PUT /api/v1/admin/channels/{platform}/config — save an account config + hot-reload. */
+export function adminSaveChannelConfig(
+  platform: string,
+  req: {
+    id?: string;
+    token?: string;
+    baseURL?: string;
+    remoteURL?: string;
+    listenAddr?: string;
+    mode?: string;
+    accessToken?: string;
+    selfID?: string;
+    config?: Record<string, unknown>;
+    allowGroups?: string[];
+    denyGroups?: string[];
+    allowUsers?: string[];
+    denyUsers?: string[];
+    groupMsgPerMin?: number;
+    msgPerMin?: number;
+    maxMessages?: number;
+  },
+): Promise<ChannelConfigSaveResult> {
+  return request<ChannelConfigSaveResult>(`/admin/channels/${platform}/config`, {
+    method: "PUT",
+    body: JSON.stringify(req),
+  });
+}
+/** DELETE /api/v1/admin/channels/{platform}/config?id=… — delete an account + hot-reload. */
+export function adminDeleteChannelAccount(platform: string, id: string): Promise<ChannelConfigSaveResult> {
+  return request<ChannelConfigSaveResult>(`/admin/channels/${platform}/config?id=${encodeURIComponent(id)}`, {
+    method: "DELETE",
+  });
+}
 /** POST /api/v1/admin/plugins/install — honest 501 (needs a plugin source). */
 export function adminPluginInstall(req: { name: string; kind: string; description: string }): Promise<AdminPluginRecord> {
   return request<AdminPluginRecord>("/admin/plugins/install", { method: "POST", body: JSON.stringify(req) });