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/service/admin_service_create_user_test.go

@@ -1,67 +1,67 @@
-//go:build unit
-
-package service
-
-import (
-	"context"
-	"errors"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-)
-
-func TestAdminService_CreateUser_Success(t *testing.T) {
-	repo := &userRepoStub{nextID: 10}
-	svc := &adminServiceImpl{userRepo: repo}
-
-	input := &CreateUserInput{
-		Email:         "user@test.com",
-		Password:      "strong-pass",
-		Username:      "tester",
-		Notes:         "note",
-		Balance:       12.5,
-		Concurrency:   7,
-		AllowedGroups: []int64{3, 5},
-	}
-
-	user, err := svc.CreateUser(context.Background(), input)
-	require.NoError(t, err)
-	require.NotNil(t, user)
-	require.Equal(t, int64(10), user.ID)
-	require.Equal(t, input.Email, user.Email)
-	require.Equal(t, input.Username, user.Username)
-	require.Equal(t, input.Notes, user.Notes)
-	require.Equal(t, input.Balance, user.Balance)
-	require.Equal(t, input.Concurrency, user.Concurrency)
-	require.Equal(t, input.AllowedGroups, user.AllowedGroups)
-	require.Equal(t, RoleUser, user.Role)
-	require.Equal(t, StatusActive, user.Status)
-	require.True(t, user.CheckPassword(input.Password))
-	require.Len(t, repo.created, 1)
-	require.Equal(t, user, repo.created[0])
-}
-
-func TestAdminService_CreateUser_EmailExists(t *testing.T) {
-	repo := &userRepoStub{createErr: ErrEmailExists}
-	svc := &adminServiceImpl{userRepo: repo}
-
-	_, err := svc.CreateUser(context.Background(), &CreateUserInput{
-		Email:    "dup@test.com",
-		Password: "password",
-	})
-	require.ErrorIs(t, err, ErrEmailExists)
-	require.Empty(t, repo.created)
-}
-
-func TestAdminService_CreateUser_CreateError(t *testing.T) {
-	createErr := errors.New("db down")
-	repo := &userRepoStub{createErr: createErr}
-	svc := &adminServiceImpl{userRepo: repo}
-
-	_, err := svc.CreateUser(context.Background(), &CreateUserInput{
-		Email:    "user@test.com",
-		Password: "password",
-	})
-	require.ErrorIs(t, err, createErr)
-	require.Empty(t, repo.created)
-}
+//go:build unit
+
+package service
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestAdminService_CreateUser_Success(t *testing.T) {
+	repo := &userRepoStub{nextID: 10}
+	svc := &adminServiceImpl{userRepo: repo}
+
+	input := &CreateUserInput{
+		Email:         "user@test.com",
+		Password:      "strong-pass",
+		Username:      "tester",
+		Notes:         "note",
+		Balance:       12.5,
+		Concurrency:   7,
+		AllowedGroups: []int64{3, 5},
+	}
+
+	user, err := svc.CreateUser(context.Background(), input)
+	require.NoError(t, err)
+	require.NotNil(t, user)
+	require.Equal(t, int64(10), user.ID)
+	require.Equal(t, input.Email, user.Email)
+	require.Equal(t, input.Username, user.Username)
+	require.Equal(t, input.Notes, user.Notes)
+	require.Equal(t, input.Balance, user.Balance)
+	require.Equal(t, input.Concurrency, user.Concurrency)
+	require.Equal(t, input.AllowedGroups, user.AllowedGroups)
+	require.Equal(t, RoleUser, user.Role)
+	require.Equal(t, StatusActive, user.Status)
+	require.True(t, user.CheckPassword(input.Password))
+	require.Len(t, repo.created, 1)
+	require.Equal(t, user, repo.created[0])
+}
+
+func TestAdminService_CreateUser_EmailExists(t *testing.T) {
+	repo := &userRepoStub{createErr: ErrEmailExists}
+	svc := &adminServiceImpl{userRepo: repo}
+
+	_, err := svc.CreateUser(context.Background(), &CreateUserInput{
+		Email:    "dup@test.com",
+		Password: "password",
+	})
+	require.ErrorIs(t, err, ErrEmailExists)
+	require.Empty(t, repo.created)
+}
+
+func TestAdminService_CreateUser_CreateError(t *testing.T) {
+	createErr := errors.New("db down")
+	repo := &userRepoStub{createErr: createErr}
+	svc := &adminServiceImpl{userRepo: repo}
+
+	_, err := svc.CreateUser(context.Background(), &CreateUserInput{
+		Email:    "user@test.com",
+		Password: "password",
+	})
+	require.ErrorIs(t, err, createErr)
+	require.Empty(t, repo.created)
+}