- Created comprehensive Zod schemas (apiRequestSchemas.ts) for:
* LoginRequest, RegisterRequest, CreateUserRequest
* UpdateUserRequest, UpdateProfileRequest
* SendMessageRequest, UpdateMessageRequest
* CreateConversationRequest, UpdateConversationRequest
* UploadTrackRequest, UpdateTrackRequest
* PaginationParams and list/search request types
- Added validation utilities:
* validateApiRequest: Validate requests before sending
* safeValidateApiRequest: Safe validation with error handling
* validateApiRequestWithError: Validation with custom error handler
- Integrated validation into API client request interceptor
- Enhanced validatedApiClient with request validation support
- Automatic validation prevents invalid requests from being sent
- Comprehensive test suite (19 tests, all passing)
- Ensures runtime type safety for all API requests
