feat(management): add test to validate priority preservation in auth file uploads

- Implemented `TestUploadAuthFile_PreservesPriorityAttributes` to ensure priority attributes and metadata are preserved during auth file uploads.
- Updated `UploadAuthFile` logic to utilize `SynthesizeAuthFile` for better handling of generated auth attributes and metadata.

Closes: #2924

internal/api/handlers/management/auth_files.go

@@ -32,6 +32,7 @@ import (
 	"github.com/router-for-me/CLIProxyAPI/v7/internal/misc"
 	"github.com/router-for-me/CLIProxyAPI/v7/internal/registry"
 	"github.com/router-for-me/CLIProxyAPI/v7/internal/util"
+	"github.com/router-for-me/CLIProxyAPI/v7/internal/watcher/synthesizer"
 	sdkAuth "github.com/router-for-me/CLIProxyAPI/v7/sdk/auth"
 	coreauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"
 	"github.com/router-for-me/CLIProxyAPI/v7/sdk/pluginapi"
@@ -1161,21 +1162,35 @@ func (h *Handler) buildAuthFromFileData(path string, data []byte) (*coreauth.Aut
 	if authID == "" {
 		authID = path
 	}
-	attr := map[string]string{
-		"path":   path,
-		"source": path,
+	auth := (*coreauth.Auth)(nil)
+	if h != nil && h.cfg != nil {
+		sctx := &synthesizer.SynthesisContext{
+			Config:      h.cfg,
+			AuthDir:     h.cfg.AuthDir,
+			Now:         time.Now(),
+			IDGenerator: synthesizer.NewStableIDGenerator(),
+		}
+		if generated := synthesizer.SynthesizeAuthFile(sctx, path, data); len(generated) > 0 && generated[0] != nil {
+			auth = generated[0].Clone()
+		}
 	}
-	auth := &coreauth.Auth{
-		ID:         authID,
-		Provider:   provider,
-		FileName:   filepath.Base(path),
-		Label:      label,
-		Status:     coreauth.StatusActive,
-		Attributes: attr,
-		Metadata:   metadata,
-		CreatedAt:  time.Now(),
-		UpdatedAt:  time.Now(),
+	if auth == nil {
+		auth = &coreauth.Auth{
+			ID:       authID,
+			Provider: provider,
+			Label:    label,
+			Status:   coreauth.StatusActive,
+			Attributes: map[string]string{
+				"path":   path,
+				"source": path,
+			},
+			Metadata:  metadata,
+			CreatedAt: time.Now(),
+			UpdatedAt: time.Now(),
+		}
 	}
+	auth.ID = authID
+	auth.FileName = filepath.Base(path)
 	if hasLastRefresh {
 		auth.LastRefreshedAt = lastRefresh
 	}

internal/api/handlers/management/auth_files_upload_test.go

@@ -0,0 +1,69 @@
+package management
+
+import (
+	"bytes"
+	"encoding/json"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/router-for-me/CLIProxyAPI/v7/internal/config"
+	coreauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"
+)
+
+func TestUploadAuthFile_PreservesPriorityAttributes(t *testing.T) {
+	t.Setenv("MANAGEMENT_PASSWORD", "")
+	gin.SetMode(gin.TestMode)
+
+	authDir := t.TempDir()
+	manager := coreauth.NewManager(nil, nil, nil)
+	h := NewHandlerWithoutConfigFilePath(&config.Config{AuthDir: authDir}, manager)
+
+	content := `{"type":"codex","email":"midai0530@gmail.com","priority":98}`
+
+	var body bytes.Buffer
+	writer := multipart.NewWriter(&body)
+	part, err := writer.CreateFormFile("file", "codex-midai0530@gmail.com-plus.json")
+	if err != nil {
+		t.Fatalf("failed to create multipart file: %v", err)
+	}
+	if _, err = part.Write([]byte(content)); err != nil {
+		t.Fatalf("failed to write multipart content: %v", err)
+	}
+	if err = writer.Close(); err != nil {
+		t.Fatalf("failed to close multipart writer: %v", err)
+	}
+
+	rec := httptest.NewRecorder()
+	ctx, _ := gin.CreateTestContext(rec)
+	req := httptest.NewRequest(http.MethodPost, "/v0/management/auth-files", &body)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+	ctx.Request = req
+
+	h.UploadAuthFile(ctx)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("expected upload status %d, got %d with body %s", http.StatusOK, rec.Code, rec.Body.String())
+	}
+
+	var payload map[string]any
+	if err = json.Unmarshal(rec.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+	if status, _ := payload["status"].(string); status != "ok" {
+		t.Fatalf("expected status ok, got %#v", payload["status"])
+	}
+
+	auth, ok := manager.GetByID("codex-midai0530@gmail.com-plus.json")
+	if !ok || auth == nil {
+		t.Fatalf("expected uploaded auth record to exist")
+	}
+	if got := auth.Attributes["priority"]; got != "98" {
+		t.Fatalf("priority attribute = %q, want %q", got, "98")
+	}
+	if got := auth.Metadata["priority"]; got != float64(98) {
+		t.Fatalf("priority metadata = %#v, want 98", got)
+	}
+}