Merge remote-tracking branch 'origin/feature/redis-auth-integration' into dev

# Conflicts:
#	go.mod
#	go.sum
#	internal/container/container.go
#	internal/repository/interfaces.go
#	internal/service/mocks_test.go
#	internal/service/texture_service_test.go
#	internal/service/token_service_test.go
#	pkg/redis/manager.go

internal/handler/swagger_test.go

@@ -0,0 +1,27 @@
+package handler
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+// 仅验证降级路径（未初始化依赖时的响应）
+func TestHealthCheck_Degraded(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.GET("/health", HealthCheck)
+
+	req := httptest.NewRequest(http.MethodGet, "/health", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusServiceUnavailable {
+		t.Fatalf("expected 503 when dependencies missing, got %d", w.Code)
+	}
+}
+
+
+