refactor(server): decouple services and improve architecture

- Introduce interfaces for all major services (JWT, PostAI, Comment, Message, Notification, QRCodeLogin, Upload, Vote, etc.) to support dependency inversion.
- Move query parameters from `internal/dto` to a new `internal/query` package to separate request payloads from data transfer objects.
- Refactor `internal/router` to use embedded `RouterDeps` for cleaner dependency management.
- Decouple handlers from repositories by injecting services instead of direct repository access, ensuring proper layering.
- Improve database initialization by moving it from `internal/model` to `internal/database`.
- Optimize message decryption by implementing a more efficient `BatchDecrypt` method in `MessageEncryptor` using a worker pool.
- Enhance error handling and security by implementing fail-fast checks for encryption key length during startup.
- Clean up unused code, including the `avatar` package and several unused DTOs.

internal/service/material_service.go

@@ -3,8 +3,8 @@ package service
 import (
 	"errors"
 
-	"with_you/internal/dto"
 	"with_you/internal/model"
+	"with_you/internal/query"
 	"with_you/internal/repository"
 )
 
@@ -23,7 +23,7 @@ type MaterialService interface {
 	DeleteSubject(id string) error
 
 	// 资料相关
-	ListMaterials(params dto.MaterialFileQueryParams) ([]*model.MaterialFile, int64, error)
+	ListMaterials(params query.MaterialFileQueryParams) ([]*model.MaterialFile, int64, error)
 	GetMaterialByID(id string) (*model.MaterialFile, error)
 	GetMaterialByIDWithSubject(id string) (*model.MaterialFile, error)
 	GetMaterialsBySubject(subjectID string, page, pageSize int) ([]*model.MaterialFile, int64, error)
@@ -129,7 +129,7 @@ func (s *materialServiceImpl) DeleteSubject(id string) error {
 // 资料相关方法
 // =====================================================
 
-func (s *materialServiceImpl) ListMaterials(params dto.MaterialFileQueryParams) ([]*model.MaterialFile, int64, error) {
+func (s *materialServiceImpl) ListMaterials(params query.MaterialFileQueryParams) ([]*model.MaterialFile, int64, error) {
 	return s.fileRepo.List(params)
 }