chore: remove license code, fix compilation, update README bilingual

- Remove all license-related code (handler/service/repository/model)
  License authorization is managed by separate server:
  https://github.com/ShukeBta/MediaStationLicenseServer
- Fix compilation errors: model field alignment, method name fixes,
  route conflicts, struct literal corrections (7 files)
- Add Chinese README.md as primary, English README_EN.md
- Update .gitignore: exclude .workbuddy/, editor backups
- Add new repository files: assistant, play_profile, storage_config

web/src/components/Layout.tsx

@@ -15,7 +15,6 @@ import {
   Heart,
   Home,
   GalleryHorizontalEnd,
-  KeyRound,
   KeySquare,
   Link2,
   ListChecks,

web/src/types/index.ts

@@ -258,8 +258,10 @@ export interface NotifyChannel {
   id: string
   name: string
   type: 'telegram' | 'wechat' | 'bark' | 'webhook' | 'email'
+  channel_type: 'telegram' | 'wechat' | 'bark' | 'webhook'
   enabled: boolean
   events: string
+  config: Record<string, string>
   created_at: string
   updated_at: string
 }