refactor(api): use predefined structs for fixed API responses

- Add api/types.go with predefined response struct types

- Replace map[string]any with typed structs for all fixed-content API endpoints

- Use predefined instances for Healthcheck and Version handlers to reduce allocations

- Improve performance by avoiding per-request map allocations

api/api.go

@@ -50,84 +50,80 @@ func InitHandleRouter(cfg *config.Config, r *touka.Engine, version string) {
 }
 
 func SizeLimitHandler(cfg *config.Config, c *touka.Context) {
-	sizeLimit := cfg.Server.SizeLimit
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"MaxResponseBodySize": sizeLimit,
-	}))
+	c.JSON(200, SizeLimitResponse{
+		MaxResponseBodySize: cfg.Server.SizeLimit,
+	})
 }
 
 func WhiteListStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"Whitelist": cfg.Whitelist.Enabled,
-	}))
+	c.JSON(200, WhitelistStatusResponse{
+		Whitelist: cfg.Whitelist.Enabled,
+	})
 }
 
 func BlackListStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"Blacklist": cfg.Blacklist.Enabled,
-	}))
+	c.JSON(200, BlacklistStatusResponse{
+		Blacklist: cfg.Blacklist.Enabled,
+	})
 }
 
 func CorsStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"Cors": cfg.Server.Cors,
-	}))
+	c.JSON(200, CorsStatusResponse{
+		Cors: cfg.Server.Cors,
+	})
 }
 
 func HealthcheckHandler(c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"Status": "OK",
-		"Repo":   "WJQSERVER-STUDIO/GHProxy",
-		"Author": "WJQSERVER-STUDIO",
-	}))
+	// 复制预定义的固定响应，避免重复分配
+	resp := baseHealthcheckResponse
+	c.JSON(200, resp)
 }
 
 func VersionHandler(c *touka.Context, version string) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"Version": version,
-		"Repo":    "WJQSERVER-STUDIO/GHProxy",
-		"Author":  "WJQSERVER-STUDIO",
-	}))
+	// 复制预定义的固定响应并填充动态字段
+	resp := baseVersionResponse
+	resp.Version = version
+	c.JSON(200, resp)
 }
 
 func RateLimitStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"RateLimit": cfg.RateLimit.Enabled,
-	}))
+	c.JSON(200, RateLimitStatusResponse{
+		RateLimit: cfg.RateLimit.Enabled,
+	})
 }
 
 func RateLimitLimitHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"RatePerMinute": cfg.RateLimit.RatePerMinute,
-	}))
+	c.JSON(200, RateLimitLimitResponse{
+		RatePerMinute: cfg.RateLimit.RatePerMinute,
+	})
 }
 
 func SmartGitStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"enabled": cfg.GitClone.Mode == "cache",
-	}))
+	c.JSON(200, SmartGitStatusResponse{
+		Enabled: cfg.GitClone.Mode == "cache",
+	})
 }
 
 func shellNestStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"enabled": cfg.Shell.Editor,
-	}))
+	c.JSON(200, ShellNestStatusResponse{
+		Enabled: cfg.Shell.Editor,
+	})
 }
 
 func ociProxyStatusHandler(cfg *config.Config, c *touka.Context) {
 	c.SetHeader("Content-Type", "application/json")
-	c.JSON(200, (map[string]any{
-		"enabled": cfg.Docker.Enabled,
-		"target":  cfg.Docker.Target,
-	}))
+	c.JSON(200, OCIDockerResponse{
+		Enabled: cfg.Docker.Enabled,
+		Target:  cfg.Docker.Target,
+	})
 }

api/types.go

@@ -0,0 +1,84 @@
+package api
+
+// 预定义的固定响应内容，避免每次请求时创建 map
+
+// HealthcheckResponse 健康检查响应
+type HealthcheckResponse struct {
+	Status string `json:"Status"`
+	Repo   string `json:"Repo"`
+	Author string `json:"Author"`
+}
+
+// VersionResponse 版本信息响应
+type VersionResponse struct {
+	Version string `json:"Version"`
+	Repo    string `json:"Repo"`
+	Author  string `json:"Author"`
+}
+
+// BoolStatusResponse 布尔状态响应
+type BoolStatusResponse struct {
+	Enabled bool `json:"enabled"`
+}
+
+// SizeLimitResponse 大小限制响应
+type SizeLimitResponse struct {
+	MaxResponseBodySize int `json:"MaxResponseBodySize"`
+}
+
+// WhitelistStatusResponse 白名单状态响应
+type WhitelistStatusResponse struct {
+	Whitelist bool `json:"Whitelist"`
+}
+
+// BlacklistStatusResponse 黑名单状态响应
+type BlacklistStatusResponse struct {
+	Blacklist bool `json:"Blacklist"`
+}
+
+// CorsStatusResponse CORS 状态响应
+type CorsStatusResponse struct {
+	Cors string `json:"Cors"`
+}
+
+// RateLimitStatusResponse 速率限制状态响应
+type RateLimitStatusResponse struct {
+	RateLimit bool `json:"RateLimit"`
+}
+
+// RateLimitLimitResponse 速率限制值响应
+type RateLimitLimitResponse struct {
+	RatePerMinute int `json:"RatePerMinute"`
+}
+
+// SmartGitStatusResponse SmartGit 状态响应
+type SmartGitStatusResponse struct {
+	Enabled bool `json:"enabled"`
+}
+
+// ShellNestStatusResponse Shell Nest 状态响应
+type ShellNestStatusResponse struct {
+	Enabled bool `json:"enabled"`
+}
+
+// OCIDockerResponse OCI/Docker 代理状态响应
+type OCIDockerResponse struct {
+	Enabled bool   `json:"enabled"`
+	Target  string `json:"target,omitempty"`
+}
+
+// 预定义的固定响应实例，避免重复分配
+var (
+	// baseHealthcheckResponse 基础健康检查响应（固定部分）
+	baseHealthcheckResponse = HealthcheckResponse{
+		Status: "OK",
+		Repo:   "WJQSERVER-STUDIO/GHProxy",
+		Author: "WJQSERVER-STUDIO",
+	}
+
+	// baseVersionResponse 基础版本响应（固定部分）
+	baseVersionResponse = VersionResponse{
+		Repo:   "WJQSERVER-STUDIO/GHProxy",
+		Author: "WJQSERVER-STUDIO",
+	}
+)