fix(desktop): console.log 清理 — 替换为结构化 logger

将 desktop/src 中 23 处 console.log 替换为 createLogger() 结构化日志:
- 生产构建自动静默 debug/info 级别
- 保留 console.error 用于关键错误可见性
- 新增 dompurify 依赖修复 XSS 防护引入缺失

涉及文件: App.tsx, offlineStore.ts, autonomy-manager.ts,
gateway-auth.ts, llm-service.ts, request-helper.ts,
security-index.ts, skill-discovery.ts, use-onboarding.ts 等 16 个文件

desktop/src/lib/use-onboarding.ts

@@ -6,6 +6,9 @@
  */
 
 import { useState, useEffect, useCallback } from 'react';
+import { createLogger } from './logger';
+
+const log = createLogger('useOnboarding');
 
 const ONBOARDING_COMPLETED_KEY = 'zclaw-onboarding-completed';
 const USER_PROFILE_KEY = 'zclaw-user-profile';
@@ -56,7 +59,7 @@ export function useOnboarding(): OnboardingState {
         setIsNeeded(true);
       }
     } catch (err) {
-      console.warn('[useOnboarding] Failed to check onboarding status:', err);
+      log.warn('Failed to check onboarding status:', err);
       setIsNeeded(true);
     } finally {
       setIsLoading(false);
@@ -75,7 +78,7 @@ export function useOnboarding(): OnboardingState {
       localStorage.setItem(USER_PROFILE_KEY, JSON.stringify(fullProfile));
       setUserProfile(fullProfile);
       setIsNeeded(false);
-      console.log('[useOnboarding] Onboarding completed for user:', profile.userName);
+      log.debug('Onboarding completed for user:', profile.userName);
     } catch (err) {
       console.error('[useOnboarding] Failed to save onboarding status:', err);
     }
@@ -88,7 +91,7 @@ export function useOnboarding(): OnboardingState {
       localStorage.removeItem(USER_PROFILE_KEY);
       setUserProfile(null);
       setIsNeeded(true);
-      console.log('[useOnboarding] Onboarding reset');
+      log.debug('Onboarding reset');
     } catch (err) {
       console.error('[useOnboarding] Failed to reset onboarding:', err);
     }
@@ -113,7 +116,7 @@ export function getStoredUserProfile(): UserProfile | null {
       return JSON.parse(profileStr) as UserProfile;
     }
   } catch (err) {
-    console.warn('[useOnboarding] Failed to get user profile:', err);
+    log.warn('Failed to get user profile:', err);
   }
   return null;
 }