feat: 品牌重命名 Sub2API -> TianShuAPI

- 前端: 所有界面显示、i18n 文本、组件中的品牌名称
- 后端: 服务层、设置默认值、邮件模板、安装向导
- 数据库: 迁移脚本注释
- 保持功能完全一致，仅更改品牌名称

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/internal/server/router.go

@@ -1,62 +1,62 @@
-package server
-
-import (
-	"github.com/Wei-Shaw/sub2api/internal/config"
-	"github.com/Wei-Shaw/sub2api/internal/handler"
-	middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
-	"github.com/Wei-Shaw/sub2api/internal/server/routes"
-	"github.com/Wei-Shaw/sub2api/internal/service"
-	"github.com/Wei-Shaw/sub2api/internal/web"
-
-	"github.com/gin-gonic/gin"
-)
-
-// SetupRouter 配置路由器中间件和路由
-func SetupRouter(
-	r *gin.Engine,
-	handlers *handler.Handlers,
-	jwtAuth middleware2.JWTAuthMiddleware,
-	adminAuth middleware2.AdminAuthMiddleware,
-	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
-	apiKeyService *service.ApiKeyService,
-	subscriptionService *service.SubscriptionService,
-	cfg *config.Config,
-) *gin.Engine {
-	// 应用中间件
-	r.Use(middleware2.Logger())
-	r.Use(middleware2.CORS())
-
-	// Serve embedded frontend if available
-	if web.HasEmbeddedFrontend() {
-		r.Use(web.ServeEmbeddedFrontend())
-	}
-
-	// 注册路由
-	registerRoutes(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, cfg)
-
-	return r
-}
-
-// registerRoutes 注册所有 HTTP 路由
-func registerRoutes(
-	r *gin.Engine,
-	h *handler.Handlers,
-	jwtAuth middleware2.JWTAuthMiddleware,
-	adminAuth middleware2.AdminAuthMiddleware,
-	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
-	apiKeyService *service.ApiKeyService,
-	subscriptionService *service.SubscriptionService,
-	cfg *config.Config,
-) {
-	// 通用路由（健康检查、状态等）
-	routes.RegisterCommonRoutes(r)
-
-	// API v1
-	v1 := r.Group("/api/v1")
-
-	// 注册各模块路由
-	routes.RegisterAuthRoutes(v1, h, jwtAuth)
-	routes.RegisterUserRoutes(v1, h, jwtAuth)
-	routes.RegisterAdminRoutes(v1, h, adminAuth)
-	routes.RegisterGatewayRoutes(r, h, apiKeyAuth, apiKeyService, subscriptionService, cfg)
-}
+package server
+
+import (
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
+	middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/server/routes"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/web"
+
+	"github.com/gin-gonic/gin"
+)
+
+// SetupRouter 配置路由器中间件和路由
+func SetupRouter(
+	r *gin.Engine,
+	handlers *handler.Handlers,
+	jwtAuth middleware2.JWTAuthMiddleware,
+	adminAuth middleware2.AdminAuthMiddleware,
+	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
+	apiKeyService *service.ApiKeyService,
+	subscriptionService *service.SubscriptionService,
+	cfg *config.Config,
+) *gin.Engine {
+	// 应用中间件
+	r.Use(middleware2.Logger())
+	r.Use(middleware2.CORS())
+
+	// Serve embedded frontend if available
+	if web.HasEmbeddedFrontend() {
+		r.Use(web.ServeEmbeddedFrontend())
+	}
+
+	// 注册路由
+	registerRoutes(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, cfg)
+
+	return r
+}
+
+// registerRoutes 注册所有 HTTP 路由
+func registerRoutes(
+	r *gin.Engine,
+	h *handler.Handlers,
+	jwtAuth middleware2.JWTAuthMiddleware,
+	adminAuth middleware2.AdminAuthMiddleware,
+	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
+	apiKeyService *service.ApiKeyService,
+	subscriptionService *service.SubscriptionService,
+	cfg *config.Config,
+) {
+	// 通用路由（健康检查、状态等）
+	routes.RegisterCommonRoutes(r)
+
+	// API v1
+	v1 := r.Group("/api/v1")
+
+	// 注册各模块路由
+	routes.RegisterAuthRoutes(v1, h, jwtAuth)
+	routes.RegisterUserRoutes(v1, h, jwtAuth)
+	routes.RegisterAdminRoutes(v1, h, adminAuth)
+	routes.RegisterGatewayRoutes(r, h, apiKeyAuth, apiKeyService, subscriptionService, cfg)
+}