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

internal/repository/repository.go

@@ -38,6 +38,9 @@ type Container struct {
 	NotifyChannel   *NotifyChannelRepository
 	Site            *SiteRepository
 	STRM            *STRMRepository
+	PlayProfile     *PlayProfileRepository
+	StorageConfig   *StorageConfigRepository
+	Assistant       *AssistantRepository
 }
 
 // New 将每个 repository 连接到单个 *gorm.DB。
@@ -62,6 +65,9 @@ func New(db *gorm.DB) *Container {
 		NotifyChannel:  &NotifyChannelRepository{db: db},
 		Site:          &SiteRepository{db: db},
 		STRM:          &STRMRepository{db: db},
+		PlayProfile:   &PlayProfileRepository{db: db},
+		StorageConfig: &StorageConfigRepository{db: db},
+		Assistant:     &AssistantRepository{db: db},
 	}
 }