♻️ refactor(setting): move API info functions to dedicated module

Move validateApiInfo and getApiInfo functions from controller layer to
setting/api_info.go to improve code organization and separation of concerns.

Changes:
- Create setting/api_info.go with ValidateApiInfo() and GetApiInfo() functions
- Remove validateApiInfo function from controller/option.go
- Remove getApiInfo function from controller/misc.go
- Update function calls to use setting package
- Clean up unused imports (net/url, regexp, fmt) in controller/option.go

This refactoring aligns the API info configuration management with the
existing pattern used by other setting modules (chat.go, group_ratio.go,
rate_limit.go, etc.) and improves code reusability and maintainability.

setting/api_info.go

@@ -0,0 +1,124 @@
+package setting
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"one-api/common"
+	"regexp"
+	"strings"
+)
+
+// ValidateApiInfo 验证API信息格式
+func ValidateApiInfo(apiInfoStr string) error {
+	if apiInfoStr == "" {
+		return nil // 空字符串是合法的
+	}
+	
+	var apiInfoList []map[string]interface{}
+	if err := json.Unmarshal([]byte(apiInfoStr), &apiInfoList); err != nil {
+		return fmt.Errorf("API信息格式错误：%s", err.Error())
+	}
+	
+	// 验证数组长度
+	if len(apiInfoList) > 50 {
+		return fmt.Errorf("API信息数量不能超过50个")
+	}
+	
+	// 允许的颜色值
+	validColors := map[string]bool{
+		"blue": true, "green": true, "cyan": true, "purple": true, "pink": true,
+		"red": true, "orange": true, "amber": true, "yellow": true, "lime": true,
+		"light-green": true, "teal": true, "light-blue": true, "indigo": true,
+		"violet": true, "grey": true,
+	}
+	
+	// URL正则表达式
+	urlRegex := regexp.MustCompile(`^https?://[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*(/.*)?$`)
+	
+	for i, apiInfo := range apiInfoList {
+		// 检查必填字段
+		urlStr, ok := apiInfo["url"].(string)
+		if !ok || urlStr == "" {
+			return fmt.Errorf("第%d个API信息缺少URL字段", i+1)
+		}
+		
+		route, ok := apiInfo["route"].(string)
+		if !ok || route == "" {
+			return fmt.Errorf("第%d个API信息缺少线路描述字段", i+1)
+		}
+		
+		description, ok := apiInfo["description"].(string)
+		if !ok || description == "" {
+			return fmt.Errorf("第%d个API信息缺少说明字段", i+1)
+		}
+		
+		color, ok := apiInfo["color"].(string)
+		if !ok || color == "" {
+			return fmt.Errorf("第%d个API信息缺少颜色字段", i+1)
+		}
+		
+		// 验证URL格式
+		if !urlRegex.MatchString(urlStr) {
+			return fmt.Errorf("第%d个API信息的URL格式不正确", i+1)
+		}
+		
+		// 验证URL可解析性
+		if _, err := url.Parse(urlStr); err != nil {
+			return fmt.Errorf("第%d个API信息的URL无法解析：%s", i+1, err.Error())
+		}
+		
+		// 验证字段长度
+		if len(urlStr) > 500 {
+			return fmt.Errorf("第%d个API信息的URL长度不能超过500字符", i+1)
+		}
+		
+		if len(route) > 100 {
+			return fmt.Errorf("第%d个API信息的线路描述长度不能超过100字符", i+1)
+		}
+		
+		if len(description) > 200 {
+			return fmt.Errorf("第%d个API信息的说明长度不能超过200字符", i+1)
+		}
+		
+		// 验证颜色值
+		if !validColors[color] {
+			return fmt.Errorf("第%d个API信息的颜色值不合法", i+1)
+		}
+		
+		// 检查并过滤危险字符（防止XSS）
+		dangerousChars := []string{"<script", "<iframe", "javascript:", "onload=", "onerror=", "onclick="}
+		for _, dangerous := range dangerousChars {
+			if strings.Contains(strings.ToLower(description), dangerous) {
+				return fmt.Errorf("第%d个API信息的说明包含不允许的内容", i+1)
+			}
+			if strings.Contains(strings.ToLower(route), dangerous) {
+				return fmt.Errorf("第%d个API信息的线路描述包含不允许的内容", i+1)
+			}
+		}
+	}
+	
+	return nil
+}
+
+// GetApiInfo 获取API信息列表
+func GetApiInfo() []map[string]interface{} {
+	// 从OptionMap中获取API信息，如果不存在则返回空数组
+	common.OptionMapRWMutex.RLock()
+	apiInfoStr, exists := common.OptionMap["ApiInfo"]
+	common.OptionMapRWMutex.RUnlock()
+	
+	if !exists || apiInfoStr == "" {
+		// 如果没有配置，返回空数组
+		return []map[string]interface{}{}
+	}
+	
+	// 解析存储的API信息
+	var apiInfo []map[string]interface{}
+	if err := json.Unmarshal([]byte(apiInfoStr), &apiInfo); err != nil {
+		// 如果解析失败，返回空数组
+		return []map[string]interface{}{}
+	}
+	
+	return apiInfo
+}