feat: switch explain flow to API data

src/config/dataSource.ts

@@ -9,7 +9,7 @@ const defaultSdkTimeoutMs = 5000
 const defaultApiBaseUrl = '/app-api'
 const defaultSgsMapId = '1'
 const defaultGuideStaticDataBaseUrl = '/static/guide-data'
-const defaultAudioApiBaseUrl = '/yudao-server'
+const defaultAudioApiBaseUrl = '/app-api'
 
 const normalizeMode = (mode: string | undefined): DataSourceMode => {
   if (mode && allowedModes.has(mode as DataSourceMode)) {
@@ -24,9 +24,13 @@ const normalizeGuideContentMode = (mode: string | undefined): GuideContentDataSo
     return mode as GuideContentDataSourceMode
   }
 
-  return 'static'
+  return 'remote'
 }
 
+const normalizeBoolean = (value: string | undefined) => (
+  ['1', 'true', 'yes', 'on'].includes(value?.trim().toLowerCase() || '')
+)
+
 const normalizeUrl = (url: string | undefined, fallback: string) => {
   const normalized = url?.trim()
   return normalized || fallback
@@ -50,6 +54,8 @@ const inferOrigin = (url: string) => {
 export const dataSourceConfig = {
   mode: normalizeMode(import.meta.env.VITE_DATA_SOURCE_MODE),
   guideContentMode: normalizeGuideContentMode(import.meta.env.VITE_GUIDE_CONTENT_SOURCE_MODE),
+  allowExplainStaticFallback: import.meta.env.DEV
+    && normalizeBoolean(import.meta.env.VITE_EXPLAIN_ALLOW_STATIC_FALLBACK),
   guideStaticDataBaseUrl: normalizeUrl(
     import.meta.env.VITE_GUIDE_STATIC_DATA_BASE_URL,
     defaultGuideStaticDataBaseUrl