test(response): fix AbortWithError router tests and oauth/bootstrap reliability

- Add middleware_test.go covering ErrorHandlerMiddleware and Abort helpers
- Switch router test setups to testhelper.NewTestGinEngine for error JSON
- Fix OAuth provider cache to use mock HTTP client and normalize issuer URLs
- Add ResetInitRuntimeOnceForTest to make bootstrap tests hermetic under -count
- Update admin/task test imports for upload/task package move

internal/apps/admin/auth_source/routers_test.go

@@ -19,8 +19,7 @@ import ("bytes"
 	"github.com/Rain-kl/Wavelet/internal/common/response")
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 
 	// Mock authentication middleware

internal/apps/admin/push/push_test.go

@@ -98,8 +98,7 @@ func setupPushTest(t *testing.T) (*gorm.DB, *miniredis.Miniredis, func()) {
 }
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin/push")
 
 	adminGroup.Use(func(c *gin.Context) {
@@ -656,7 +655,7 @@ func TestPushChannelAPI(t *testing.T) {
 	defer cleanup()
 
 	// 构建路由以进行 HTTP 模拟请求
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 	{
 		adminGroup.GET("/push/channels", ListChannels)

internal/apps/admin/system_config/routers_test.go

@@ -27,8 +27,7 @@ import ("bufio"
 const expectedDefaultConfigsCount = 30
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 
 	// Mock authentication middleware

internal/apps/admin/task/routers_test.go

@@ -14,7 +14,7 @@ import ("bytes"
 	"time"
 
 	"github.com/Rain-kl/Wavelet/internal/apps/oauth"
-	"github.com/Rain-kl/Wavelet/internal/apps/upload"
+	uploadtask "github.com/Rain-kl/Wavelet/internal/apps/upload/task"
 	"github.com/Rain-kl/Wavelet/internal/apps/user"
 	"github.com/Rain-kl/Wavelet/internal/bootstrap"
 	"github.com/Rain-kl/Wavelet/internal/model"
@@ -44,8 +44,7 @@ func setupTaskTestEnvironment(t *testing.T) func() {
 }
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 
 	// Mock authentication middleware
@@ -93,18 +92,18 @@ func TestListTaskTypes(t *testing.T) {
 	foundCleanup := false
 	foundWarmImageCache := false
 	for _, m := range taskMetas {
-		if m.Type == upload.TaskTypeSystemCleanup {
+		if m.Type == uploadtask.TaskTypeSystemCleanup {
 			foundCleanup = true
 		}
-		if m.Type == upload.TaskTypeWarmImageCache {
+		if m.Type == uploadtask.TaskTypeWarmImageCache {
 			foundWarmImageCache = true
 		}
 	}
 	if !foundCleanup {
-		t.Errorf("expected task type %s to be listed", upload.TaskTypeSystemCleanup)
+		t.Errorf("expected task type %s to be listed", uploadtask.TaskTypeSystemCleanup)
 	}
 	if !foundWarmImageCache {
-		t.Errorf("expected task type %s to be listed", upload.TaskTypeWarmImageCache)
+		t.Errorf("expected task type %s to be listed", uploadtask.TaskTypeWarmImageCache)
 	}
 }
 
@@ -117,7 +116,7 @@ func TestDispatchTask(t *testing.T) {
 
 	t.Run("dispatch valid task successfully", func(t *testing.T) {
 		payload := DispatchTaskRequest{
-			TaskType: upload.TaskTypeSystemCleanup,
+			TaskType: uploadtask.TaskTypeSystemCleanup,
 		}
 		body, _ := json.Marshal(payload)
 		req, _ := http.NewRequest("POST", "/api/v1/admin/tasks/dispatch", bytes.NewBuffer(body))

internal/apps/admin/template/routers_test.go

@@ -18,8 +18,7 @@ import ("bytes"
 	"github.com/Rain-kl/Wavelet/internal/common/response")
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 
 	// Mock authentication middleware

internal/apps/admin/user/routers_test.go

@@ -20,8 +20,7 @@ import ("bytes"
 	"github.com/Rain-kl/Wavelet/internal/common/response")
 
 func setupTestRouter(authUser *model.User) *gin.Engine {
-	gin.SetMode(gin.TestMode)
-	r := gin.New()
+	r := testhelper.NewTestGinEngine()
 	adminGroup := r.Group("/api/v1/admin")
 
 	// Mock authentication middleware