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/middleware/wire.go

@@ -1,22 +1,22 @@
-package middleware
-
-import (
-	"github.com/gin-gonic/gin"
-	"github.com/google/wire"
-)
-
-// JWTAuthMiddleware JWT 认证中间件类型
-type JWTAuthMiddleware gin.HandlerFunc
-
-// AdminAuthMiddleware 管理员认证中间件类型
-type AdminAuthMiddleware gin.HandlerFunc
-
-// ApiKeyAuthMiddleware API Key 认证中间件类型
-type ApiKeyAuthMiddleware gin.HandlerFunc
-
-// ProviderSet 中间件层的依赖注入
-var ProviderSet = wire.NewSet(
-	NewJWTAuthMiddleware,
-	NewAdminAuthMiddleware,
-	NewApiKeyAuthMiddleware,
-)
+package middleware
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/google/wire"
+)
+
+// JWTAuthMiddleware JWT 认证中间件类型
+type JWTAuthMiddleware gin.HandlerFunc
+
+// AdminAuthMiddleware 管理员认证中间件类型
+type AdminAuthMiddleware gin.HandlerFunc
+
+// ApiKeyAuthMiddleware API Key 认证中间件类型
+type ApiKeyAuthMiddleware gin.HandlerFunc
+
+// ProviderSet 中间件层的依赖注入
+var ProviderSet = wire.NewSet(
+	NewJWTAuthMiddleware,
+	NewAdminAuthMiddleware,
+	NewApiKeyAuthMiddleware,
+)