feat: 新增 Logs、Memory、Plan 页面

- 添加 Logs.vue 日志页面
- 添加 Memory.vue 记忆页面
- 添加 Plan.vue 计划页面
- 更新路由和侧边栏导航

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/components/Sidebar.vue

@@ -51,11 +51,13 @@ const group2 = computed(() => [
   { name: 'Knowledge', icon: 'fa-brain', path: '/knowledge', badge: knowledgeCount.value },
 ])
 
-// 第3组: Skills, Tools, Script
+// 第3组: Skills, Tools, Script, Plan, Memory
 const group3 = computed(() => [
   { name: 'Skills', icon: 'fa-wand-magic-sparkles', badge: 21, path: '/mcp' },
   { name: 'Tools', icon: 'fa-tools', badge: 13, path: '/model-apis' },
   { name: 'Script', icon: 'fa-code', path: '/script' },
+  { name: 'Plan', icon: 'fa-clock', path: '/plan' },
+  { name: 'Memory', icon: 'fa-brain', path: '/memory' },
 ])
 
 // 第4组: Dashboard, Account, Settings