feat: refine codex live chat flow

etc/servers/work-server/src/routes/app-config.ts

@@ -1,6 +1,12 @@
 import type { FastifyInstance } from 'fastify';
 import { z } from 'zod';
-import { getAppConfig, getChatTypesConfig, upsertAppConfig, upsertChatTypesConfig } from '../services/app-config-service.js';
+import {
+  getAppConfig,
+  getChatTypesConfig,
+  normalizeAppConfigSnapshot,
+  upsertAppConfig,
+  upsertChatTypesConfig,
+} from '../services/app-config-service.js';
 import { getAutomationTypesConfig, upsertAutomationTypesConfig } from '../services/automation-type-config-service.js';
 
 export async function registerAppConfigRoutes(app: FastifyInstance) {
@@ -9,7 +15,7 @@ export async function registerAppConfigRoutes(app: FastifyInstance) {
 
     return {
       ok: true,
-      config: config ?? {},
+      config: normalizeAppConfigSnapshot(config),
     };
   });
 
@@ -115,7 +121,7 @@ export async function registerAppConfigRoutes(app: FastifyInstance) {
 
       return {
         ok: true,
-        config: savedConfig,
+        config: normalizeAppConfigSnapshot(savedConfig),
       };
     } catch (error) {
       return reply.code(409).send({