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/http.go

@@ -1,54 +1,54 @@
-package server
-
-import (
-	"net/http"
-	"time"
-
-	"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/service"
-
-	"github.com/gin-gonic/gin"
-	"github.com/google/wire"
-)
-
-// ProviderSet 提供服务器层的依赖
-var ProviderSet = wire.NewSet(
-	ProvideRouter,
-	ProvideHTTPServer,
-)
-
-// ProvideRouter 提供路由器
-func ProvideRouter(
-	cfg *config.Config,
-	handlers *handler.Handlers,
-	jwtAuth middleware2.JWTAuthMiddleware,
-	adminAuth middleware2.AdminAuthMiddleware,
-	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
-	apiKeyService *service.ApiKeyService,
-	subscriptionService *service.SubscriptionService,
-) *gin.Engine {
-	if cfg.Server.Mode == "release" {
-		gin.SetMode(gin.ReleaseMode)
-	}
-
-	r := gin.New()
-	r.Use(middleware2.Recovery())
-
-	return SetupRouter(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, cfg)
-}
-
-// ProvideHTTPServer 提供 HTTP 服务器
-func ProvideHTTPServer(cfg *config.Config, router *gin.Engine) *http.Server {
-	return &http.Server{
-		Addr:    cfg.Server.Address(),
-		Handler: router,
-		// ReadHeaderTimeout: 读取请求头的超时时间，防止慢速请求头攻击
-		ReadHeaderTimeout: time.Duration(cfg.Server.ReadHeaderTimeout) * time.Second,
-		// IdleTimeout: 空闲连接超时时间，释放不活跃的连接资源
-		IdleTimeout: time.Duration(cfg.Server.IdleTimeout) * time.Second,
-		// 注意：不设置 WriteTimeout，因为流式响应可能持续十几分钟
-		// 不设置 ReadTimeout，因为大请求体可能需要较长时间读取
-	}
-}
+package server
+
+import (
+	"net/http"
+	"time"
+
+	"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/service"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/wire"
+)
+
+// ProviderSet 提供服务器层的依赖
+var ProviderSet = wire.NewSet(
+	ProvideRouter,
+	ProvideHTTPServer,
+)
+
+// ProvideRouter 提供路由器
+func ProvideRouter(
+	cfg *config.Config,
+	handlers *handler.Handlers,
+	jwtAuth middleware2.JWTAuthMiddleware,
+	adminAuth middleware2.AdminAuthMiddleware,
+	apiKeyAuth middleware2.ApiKeyAuthMiddleware,
+	apiKeyService *service.ApiKeyService,
+	subscriptionService *service.SubscriptionService,
+) *gin.Engine {
+	if cfg.Server.Mode == "release" {
+		gin.SetMode(gin.ReleaseMode)
+	}
+
+	r := gin.New()
+	r.Use(middleware2.Recovery())
+
+	return SetupRouter(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, cfg)
+}
+
+// ProvideHTTPServer 提供 HTTP 服务器
+func ProvideHTTPServer(cfg *config.Config, router *gin.Engine) *http.Server {
+	return &http.Server{
+		Addr:    cfg.Server.Address(),
+		Handler: router,
+		// ReadHeaderTimeout: 读取请求头的超时时间，防止慢速请求头攻击
+		ReadHeaderTimeout: time.Duration(cfg.Server.ReadHeaderTimeout) * time.Second,
+		// IdleTimeout: 空闲连接超时时间，释放不活跃的连接资源
+		IdleTimeout: time.Duration(cfg.Server.IdleTimeout) * time.Second,
+		// 注意：不设置 WriteTimeout，因为流式响应可能持续十几分钟
+		// 不设置 ReadTimeout，因为大请求体可能需要较长时间读取
+	}
+}