优化页面交互并增强 Provider 配置能力

- 表单下拉框不再用 label 包裹，改为 div + aria-label，避免点击后
  下拉面板瞬间关闭
- Provider 卡片新增「从上游获取模型」和「修改」入口，支持编辑
  base URL、API Key 与 api_mode，凭据写入对应的环境变量
- 服务端抽出 provider-model-discovery 统一不同 api_mode 的模型发现，
  旧的 custom_providers 与新的 providers 字典结构都能正确更新
- Agent Bridge 改为后台启动，HTTP 接口在 Python 运行时就绪前即可用；
  worker 连接被拒时按类型重试，不重放可能已产生副作用的请求
- 断线重连后恢复 profiles、models 与会话列表，健康检查改为自调度
  的 setTimeout，离线时 2 秒后重试
- 批量删除确认文案改用 Popconfirm content，避免变成侧栏触发器文本

packages/server/src/index.ts

@@ -18,7 +18,7 @@ import { setGroupChatServer } from './routes/hermes/group-chat'
 import { setChatRunServer } from './routes/hermes/chat-run'
 import { GroupChatServer } from './services/hermes/group-chat'
 import { ChatRunSocket } from './services/hermes/run-chat'
-import { startAgentBridgeManager } from './services/hermes/agent-bridge'
+import { getAgentBridgeManager } from './services/hermes/agent-bridge'
 import { HermesSkillInjector } from './services/hermes/skill-injector'
 import { injectBundledMcpServer } from './services/hermes/studio-mcp-autoinject'
 import { ensureProfileGatewaysRunning } from './services/hermes/gateway-autostart'
@@ -109,7 +109,7 @@ function skillInjectionDisabled(): boolean {
   return envFlagEnabled('HERMES_WEB_UI_DISABLE_SKILL_INJECTION')
 }
 
-async function startRuntimeServicesBeforeListen(): Promise<void> {
+async function startRuntimeServices(): Promise<void> {
   if (gatewayAutostartDisabled()) {
     console.log('[bootstrap] profile gateway check disabled by HERMES_WEB_UI_DISABLE_GATEWAY_AUTOSTART')
   } else {
@@ -122,7 +122,7 @@ async function startRuntimeServicesBeforeListen(): Promise<void> {
   }
 
   try {
-    agentBridgeManager = await startAgentBridgeManager()
+    await agentBridgeManager.start()
     console.log('[bootstrap] agent bridge started')
   } catch (err) {
     logger.warn(err, '[bootstrap] agent bridge failed to start')
@@ -187,8 +187,6 @@ export async function bootstrap() {
     console.warn('[bootstrap] failed to inject bundled MCP server:', err instanceof Error ? err.message : err)
   }
 
-  await startRuntimeServicesBeforeListen()
-
   const app = new Koa()
   // Initialize all web-ui SQLite tables
   const { initAllStores } = await import('./db/hermes/init')
@@ -291,7 +289,10 @@ export async function bootstrap() {
     })
   })
 
+  agentBridgeManager = getAgentBridgeManager()
   bindShutdown(servers, groupChatServer, chatRunServer, agentBridgeManager)
+  // Session/history APIs must remain available while the Python runtime starts.
+  void startRuntimeServices()
   startVersionCheck()
 }