Refactor site configuration and color scheme management

- Replaced static config with dynamic site info context.
- Updated color scheme handling in various components to use site info.
- Removed deprecated config file and integrated site info fetching.
- Enhanced user preference page to allow color scheme selection.
- Adjusted blog and console components to reflect new site info structure.
- Improved error handling and fallback mechanisms for site info retrieval.

internal/model/json.go

@@ -1 +1,84 @@
 package model
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"fmt"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/schema"
+)
+
+// JSONMap 是一个通用的 JSON 类型（map[string]any）
+type JSONMap map[string]any
+
+func (JSONMap) GormDataType() string {
+	return "json"
+}
+
+func (JSONMap) GormDBDataType(db *gorm.DB, _ *schema.Field) string {
+	switch db.Dialector.Name() {
+	case "mysql":
+		return "JSON"
+	case "postgres":
+		return "JSONB"
+	default: // sqlite 等
+		return "TEXT"
+	}
+}
+
+// Value 实现 driver.Valuer，用于写入数据库
+func (j JSONMap) Value() (driver.Value, error) {
+	if j == nil {
+		return nil, nil
+	}
+	b, err := json.Marshal(map[string]any(j))
+	if err != nil {
+		return nil, err
+	}
+	return string(b), nil
+}
+
+// Scan 实现 sql.Scanner，用于从数据库读取并反序列化
+func (j *JSONMap) Scan(src any) error {
+	if src == nil {
+		*j = nil
+		return nil
+	}
+	var data []byte
+	switch v := src.(type) {
+	case string:
+		data = []byte(v)
+	case []byte:
+		data = v
+	default:
+		return fmt.Errorf("cannot scan JSONMap from %T", src)
+	}
+	if len(data) == 0 {
+		*j = nil
+		return nil
+	}
+	var m map[string]any
+	if err := json.Unmarshal(data, &m); err != nil {
+		return err
+	}
+	*j = JSONMap(m)
+	return nil
+}
+
+func (j JSONMap) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any(j))
+}
+
+func (j *JSONMap) UnmarshalJSON(b []byte) error {
+	if len(b) == 0 || string(b) == "null" {
+		*j = nil
+		return nil
+	}
+	var m map[string]any
+	if err := json.Unmarshal(b, &m); err != nil {
+		return err
+	}
+	*j = JSONMap(m)
+	return nil
+}