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/repository/redis_test.go

@@ -1,35 +1,35 @@
-package repository
-
-import (
-	"testing"
-	"time"
-
-	"github.com/Wei-Shaw/sub2api/internal/config"
-	"github.com/stretchr/testify/require"
-)
-
-func TestBuildRedisOptions(t *testing.T) {
-	cfg := &config.Config{
-		Redis: config.RedisConfig{
-			Host:                "localhost",
-			Port:                6379,
-			Password:            "secret",
-			DB:                  2,
-			DialTimeoutSeconds:  5,
-			ReadTimeoutSeconds:  3,
-			WriteTimeoutSeconds: 4,
-			PoolSize:            100,
-			MinIdleConns:        10,
-		},
-	}
-
-	opts := buildRedisOptions(cfg)
-	require.Equal(t, "localhost:6379", opts.Addr)
-	require.Equal(t, "secret", opts.Password)
-	require.Equal(t, 2, opts.DB)
-	require.Equal(t, 5*time.Second, opts.DialTimeout)
-	require.Equal(t, 3*time.Second, opts.ReadTimeout)
-	require.Equal(t, 4*time.Second, opts.WriteTimeout)
-	require.Equal(t, 100, opts.PoolSize)
-	require.Equal(t, 10, opts.MinIdleConns)
-}
+package repository
+
+import (
+	"testing"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBuildRedisOptions(t *testing.T) {
+	cfg := &config.Config{
+		Redis: config.RedisConfig{
+			Host:                "localhost",
+			Port:                6379,
+			Password:            "secret",
+			DB:                  2,
+			DialTimeoutSeconds:  5,
+			ReadTimeoutSeconds:  3,
+			WriteTimeoutSeconds: 4,
+			PoolSize:            100,
+			MinIdleConns:        10,
+		},
+	}
+
+	opts := buildRedisOptions(cfg)
+	require.Equal(t, "localhost:6379", opts.Addr)
+	require.Equal(t, "secret", opts.Password)
+	require.Equal(t, 2, opts.DB)
+	require.Equal(t, 5*time.Second, opts.DialTimeout)
+	require.Equal(t, 3*time.Second, opts.ReadTimeout)
+	require.Equal(t, 4*time.Second, opts.WriteTimeout)
+	require.Equal(t, 100, opts.PoolSize)
+	require.Equal(t, 10, opts.MinIdleConns)
+}