diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index aee58a5..20c552c 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -114,6 +114,8 @@ export default function App() {
   // URL → 页面状态（直接输入/刷新/分享链接时恢复）
   useEffect(() => {
     const path = location.pathname.replace(/\/+$/, '') || '/';
+    // 登录页不参与模块路由（否则与未登录跳转互相重定向形成死循环）
+    if (path === '/login') return;
     const editorMatch = path.match(/^\/pipelines\/(\d+)/);
     if (editorMatch) {
       setActiveModule('pipelines');
diff --git a/frontend/src/pages/SystemSettings.tsx b/frontend/src/pages/SystemSettings.tsx
index d35af11..800610f 100644
--- a/frontend/src/pages/SystemSettings.tsx
+++ b/frontend/src/pages/SystemSettings.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useRef, useState } from 'react';
 import {
   Palette, Monitor, Moon, Sun,
-  Save, RotateCcw, CheckCircle2, Globe, Bell, Loader2, ExternalLink, ChevronDown, ChevronRight
+  Save, RotateCcw, Globe, Bell, Loader2, ExternalLink, ChevronDown, ChevronRight
 } from 'lucide-react';
 import { toast } from 'sonner';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
@@ -11,11 +11,6 @@ import WebhookManager from '@/components/settings/WebhookManager';
 
 interface ThemeConfig {
   mode: 'light' | 'dark' | 'system';
-  primaryColor: string;
-  fontSize: 'small' | 'medium' | 'large';
-  density: 'compact' | 'comfortable' | 'spacious';
-  sidebarStyle: 'collapsed' | 'icons' | 'full';
-  borderRadius: 'sharp' | 'soft' | 'round';
 }
 
 interface NotificationConfig {
@@ -28,11 +23,6 @@ interface NotificationConfig {
 
 const defaultTheme: ThemeConfig = {
   mode: 'light',
-  primaryColor: '#0969da',
-  fontSize: 'medium',
-  density: 'comfortable',
-  sidebarStyle: 'full',
-  borderRadius: 'soft',
 };
 
 const defaultNotifications: NotificationConfig = {
@@ -55,15 +45,6 @@ function safeParse<T extends object>(raw: unknown, fallback: T): T {
   }
 }
 
-const colorOptions = [
-  { name: '蓝色', value: '#0969da', class: 'bg-[#0969da]' },
-  { name: '绿色', value: '#1a7f37', class: 'bg-[#1a7f37]' },
-  { name: '紫色', value: '#8250df', class: 'bg-[#8250df]' },
-  { name: '橙色', value: '#bc4c00', class: 'bg-[#bc4c00]' },
-  { name: '红色', value: '#cf222e', class: 'bg-[#cf222e]' },
-  { name: '青色', value: '#0e7c7b', class: 'bg-[#0e7c7b]' },
-];
-
 // LLM 服务商预设（OpenAI 兼容接口）
 const LLM_PROVIDERS = [
   { id: 'deepseek', label: 'DeepSeek', endpoint: 'https://api.deepseek.com/v1', model: 'deepseek-chat', keyUrl: 'https://platform.deepseek.com/api_keys' },
@@ -365,88 +346,6 @@ export default function SystemSettings() {
                   ))}
                 </div>
               </div>
-
-              {/* Primary color */}
-              <div>
-                <label className="block text-[12px] font-medium mb-2" style={{ color: 'var(--text-secondary)' }}>主题色</label>
-                <div className="flex items-center gap-2">
-                  {colorOptions.map(c => (
-                    <button key={c.value} onClick={() => setTheme(p => ({ ...p, primaryColor: c.value }))}
-                      className={`w-8 h-8 rounded-full ${c.class} flex items-center justify-center transition-transform hover:scale-110`}
-                      title={c.name}>
-                      {theme.primaryColor === c.value && <CheckCircle2 className="w-4 h-4 text-white" />}
-                    </button>
-                  ))}
-                </div>
-              </div>
-
-              {/* Font size */}
-              <div>
-                <label className="block text-[12px] font-medium mb-2" style={{ color: 'var(--text-secondary)' }}>字体大小</label>
-                <div className="flex items-center gap-2">
-                  {[
-                    { id: 'small', label: '小', size: '12px' },
-                    { id: 'medium', label: '中', size: '14px' },
-                    { id: 'large', label: '大', size: '16px' },
-                  ].map(f => (
-                    <button key={f.id} onClick={() => setTheme(p => ({ ...p, fontSize: f.id as ThemeConfig['fontSize'] }))}
-                      className="flex-1 py-[7px] text-[12px] font-medium rounded-md border transition-colors text-center"
-                      style={{
-                        borderColor: theme.fontSize === f.id ? 'var(--accent-blue)' : 'var(--border-color-light)',
-                        background: theme.fontSize === f.id ? 'var(--accent-blue-light)' : 'transparent',
-                        color: theme.fontSize === f.id ? 'var(--accent-blue)' : 'var(--text-secondary)',
-                        fontSize: f.size,
-                      }}>
-                      {f.label}
-                    </button>
-                  ))}
-                </div>
-              </div>
-
-              {/* Density */}
-              <div>
-                <label className="block text-[12px] font-medium mb-2" style={{ color: 'var(--text-secondary)' }}>界面密度</label>
-                <div className="flex items-center gap-2">
-                  {[
-                    { id: 'compact', label: '紧凑' },
-                    { id: 'comfortable', label: '舒适' },
-                    { id: 'spacious', label: '宽松' },
-                  ].map(d => (
-                    <button key={d.id} onClick={() => setTheme(p => ({ ...p, density: d.id as ThemeConfig['density'] }))}
-                      className="flex-1 py-[7px] text-[12px] font-medium rounded-md border transition-colors"
-                      style={{
-                        borderColor: theme.density === d.id ? 'var(--accent-blue)' : 'var(--border-color-light)',
-                        background: theme.density === d.id ? 'var(--accent-blue-light)' : 'transparent',
-                        color: theme.density === d.id ? 'var(--accent-blue)' : 'var(--text-secondary)',
-                      }}>
-                      {d.label}
-                    </button>
-                  ))}
-                </div>
-              </div>
-
-              {/* Border radius */}
-              <div>
-                <label className="block text-[12px] font-medium mb-2" style={{ color: 'var(--text-secondary)' }}>圆角风格</label>
-                <div className="flex items-center gap-2">
-                  {[
-                    { id: 'sharp', label: '直角', radius: '0px' },
-                    { id: 'soft', label: '圆角', radius: '6px' },
-                    { id: 'round', label: '大圆角', radius: '12px' },
-                  ].map(r => (
-                    <button key={r.id} onClick={() => setTheme(p => ({ ...p, borderRadius: r.id as ThemeConfig['borderRadius'] }))}
-                      className="flex-1 py-[7px] text-[12px] font-medium border transition-colors"
-                      style={{
-                        borderColor: theme.borderRadius === r.id ? 'var(--accent-blue)' : 'var(--border-color-light)',
-                        background: theme.borderRadius === r.id ? 'var(--accent-blue-light)' : 'transparent',
-                        color: theme.borderRadius === r.id ? 'var(--accent-blue)' : 'var(--text-secondary)',
-                        borderRadius: r.radius,
-                      }}>
-                      {r.label}
-                    </button>
-                  ))}
-                </div>
-              </div>
             </div>
           </div>