refactor: remove CursorAccountCard component and related localization entries

- Deleted the CursorAccountCard.vue component, which handled user account login and status.
- Removed associated localization entries from catalog.json and various language files.
- Updated Home.vue to eliminate references to the removed component.
- Refactored clientApi.js to remove unused account-related API functions.

internal/client/service.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"net/http"
-	"path/filepath"
 	"sync"
 	"time"
 
@@ -12,7 +11,6 @@ import (
 	backend "cursor/internal/backend"
 	serverconfig "cursor/internal/backend/server/config"
 	"cursor/internal/certs"
-	"cursor/internal/cursoraccount"
 	"cursor/internal/logger"
 	"cursor/internal/mitm"
 	"cursor/internal/netproxy"
@@ -37,8 +35,6 @@ type ProxyService struct {
 	certManager *certs.Manager
 	// backendHost 表示当前嵌入式 backend 服务。
 	backendHost *backend.Host
-	// cursorAccount 持有仅供插件、Skills 和 MCP 控制面使用的真实 Cursor 身份。
-	cursorAccount *cursoraccount.Manager
 
 	// mu 表示当前声明中的 mu。
 	mu sync.RWMutex
@@ -88,12 +84,8 @@ func NewProxyService(proxy *mitm.ProxyServer, certManager *certs.Manager, caCert
 		publicClient:     netproxy.NewHTTPClient(publicAPITimeout),
 		modelTestResults: make(map[string]ModelAdapterTestResult),
 	}
-	service.cursorAccount = cursoraccount.NewManager(
-		filepath.Join(appdata.DataRootPath(), "cursor-account.json"),
-		netproxy.NewHTTPClient(publicAPITimeout),
-	)
 	service.store = serverconfig.NewStore(service.configPath, service.logsRoot)
-	host, err := backend.NewHost(service.store, service.cursorAccount)
+	host, err := service.newBackendHost()
 	if err != nil {
 		logger.Errorf("init backend host failed: %v", err)
 	} else {
@@ -109,7 +101,7 @@ func (s *ProxyService) ensureBackendHost() error {
 	if s.backendHost != nil {
 		return nil
 	}
-	host, err := backend.NewHost(s.store, s.cursorAccount)
+	host, err := s.newBackendHost()
 	if err != nil {
 		return err
 	}
@@ -117,6 +109,18 @@ func (s *ProxyService) ensureBackendHost() error {
 	return nil
 }
 
+func (s *ProxyService) newBackendHost() (*backend.Host, error) {
+	options := []backend.HostOption{}
+	if s != nil && s.certManager != nil {
+		certificate, err := s.certManager.CertificateForServerName("localhost")
+		if err != nil {
+			return nil, fmt.Errorf("create localhost backend certificate: %w", err)
+		}
+		options = append(options, backend.WithTLSCertificate(certificate))
+	}
+	return backend.NewHost(s.store, options...)
+}
+
 func (s *ProxyService) ensureProxy(cfg serverconfig.Config) error {
 	if s == nil {
 		return nil