refactor: upgrade to Go 1.26 and modernize code idioms

- Replace `interface{}` with `any` type alias across all packages
- Use built-in `min()`/`max()` for parameter clamping
- Use `slices.SortFunc`, `slices.Min`, `slices.Max` for cleaner code
- Use `strings.Cut()` for simpler string parsing in auth middleware
- Use `errors.Is()` for proper error comparison in handlers
- Update dependencies: golang.org/x/image 0.37.0 -> 0.38.0
- Add Wire code generation guidelines to ARCHITECTURE.md
- Disable Go cache in CI build workflow

internal/model/material.go

@@ -66,7 +66,7 @@ func (a StringArray) Value() (driver.Value, error) {
 }
 
 // Scan 实现 sql.Scanner 接口
-func (a *StringArray) Scan(value interface{}) error {
+func (a *StringArray) Scan(value any) error {
 	if value == nil {
 		*a = nil
 		return nil
@@ -80,20 +80,20 @@ func (a *StringArray) Scan(value interface{}) error {
 
 // MaterialFile 文件资料
 type MaterialFile struct {
-	ID            string          `json:"id" gorm:"type:varchar(36);primaryKey"`
-	SubjectID     string          `json:"subject_id" gorm:"type:varchar(36);index;not null"`
-	Title         string          `json:"title" gorm:"type:varchar(200);not null"`
-	Description   string          `json:"description" gorm:"type:text"`
+	ID            string           `json:"id" gorm:"type:varchar(36);primaryKey"`
+	SubjectID     string           `json:"subject_id" gorm:"type:varchar(36);index;not null"`
+	Title         string           `json:"title" gorm:"type:varchar(200);not null"`
+	Description   string           `json:"description" gorm:"type:text"`
 	FileType      MaterialFileType `json:"file_type" gorm:"type:varchar(20);not null;index"`
-	FileSize      int64           `json:"file_size" gorm:"default:0"`           // 文件大小(字节)
-	FileURL       string          `json:"file_url" gorm:"type:text;not null"`   // 文件URL
-	FileName      string          `json:"file_name" gorm:"type:varchar(255)"`   // 原始文件名
-	DownloadCount int             `json:"download_count" gorm:"default:0"`      // 下载次数
-	AuthorID      string          `json:"author_id" gorm:"type:varchar(36);index"` // 上传者ID
-	Tags          StringArray     `json:"tags" gorm:"type:json"`                  // 标签
-	Status        MaterialStatus  `json:"status" gorm:"type:varchar(20);default:active;index"` // 状态
-	CreatedAt     time.Time       `json:"created_at" gorm:"autoCreateTime;index"`
-	UpdatedAt     time.Time       `json:"updated_at" gorm:"autoUpdateTime"`
+	FileSize      int64            `json:"file_size" gorm:"default:0"`                          // 文件大小(字节)
+	FileURL       string           `json:"file_url" gorm:"type:text;not null"`                  // 文件URL
+	FileName      string           `json:"file_name" gorm:"type:varchar(255)"`                  // 原始文件名
+	DownloadCount int              `json:"download_count" gorm:"default:0"`                     // 下载次数
+	AuthorID      string           `json:"author_id" gorm:"type:varchar(36);index"`             // 上传者ID
+	Tags          StringArray      `json:"tags" gorm:"type:json"`                               // 标签
+	Status        MaterialStatus   `json:"status" gorm:"type:varchar(20);default:active;index"` // 状态
+	CreatedAt     time.Time        `json:"created_at" gorm:"autoCreateTime;index"`
+	UpdatedAt     time.Time        `json:"updated_at" gorm:"autoUpdateTime"`
 
 	// 关联
 	Subject *MaterialSubject `json:"subject,omitempty" gorm:"foreignKey:SubjectID"`