revert: remove fork-only changes from release sync

Revert payment/wechat, sora/claude-max cleanup, fork-only migrations,
and cosmetic changes that were brought in by the release sync commit.
Keep only channel-monitor related improvements:
- PublicSettingsInjectionPayload named struct with drift test
- ChannelMonitorRunner graceful shutdown in wire
- image_output_price in SupportedModelChip
- Simplified buildSelfNavItems in AppSidebar
- Gateway WARN logs for 503 branches

frontend/src/api/admin/accounts.ts

@@ -17,7 +17,7 @@ import type {
   AdminDataPayload,
   AdminDataImportResult,
   CheckMixedChannelRequest,
-  CheckMixedChannelResponse,
+  CheckMixedChannelResponse
 } from '@/types'
 
 /**
@@ -663,7 +663,7 @@ export const accountsAPI = {
   getAntigravityDefaultModelMapping,
   batchClearError,
   batchRefresh,
-  setPrivacy,
+  setPrivacy
 }
 
 export default accountsAPI