feat(导航): 调整导航菜单和首页功能顺序

将"49过程矩阵"移至导航菜单第二位，并在首页添加对应功能卡片
移除不再使用的可视化功能
优化全屏模式下的样式处理

src/components/layout/Sidebar.tsx

@@ -14,9 +14,9 @@ import {
 
 const navItems = [
   { path: '/', label: '首页', icon: Home },
+  { path: '/process-matrix', label: '49过程矩阵', icon: LayoutGrid },
   { path: '/knowledge-areas', label: '知识领域', icon: BookOpen },
   { path: '/process-groups', label: '过程组', icon: Layers },
-  { path: '/process-matrix', label: '49过程矩阵', icon: LayoutGrid },
   { path: '/process-graph', label: '过程关系图', icon: Share2 },
   { path: '/settings', label: '设置', icon: Settings },
 ]

src/pages/HomePage.tsx

@@ -1,9 +1,17 @@
 import { Link } from 'react-router-dom'
 import { motion } from 'framer-motion'
-import { BookOpen, Layers, GitBranch, ArrowRight } from 'lucide-react'
+import { BookOpen, Layers, LayoutGrid, ArrowRight } from 'lucide-react'
 import { stats } from '@/data'
 
 const features = [
+  {
+    icon: LayoutGrid,
+    title: '49过程矩阵',
+    description: '全景展示5大过程组与10大知识领域的49个过程',
+    link: '/process-matrix',
+    color: 'from-emerald-500 to-teal-500',
+    count: stats.processCount,
+  },
   {
     icon: BookOpen,
     title: '知识领域',
@@ -20,14 +28,6 @@ const features = [
     color: 'from-blue-500 to-cyan-500',
     count: stats.processGroupCount,
   },
-  {
-    icon: GitBranch,
-    title: '可视化',
-    description: 'ITTO流程图和数据流向可视化分析',
-    link: '/visualize',
-    color: 'from-emerald-500 to-teal-500',
-    count: stats.processCount,
-  },
 ]
 
 const containerVariants = {
@@ -75,10 +75,10 @@ export function HomePage() {
               <ArrowRight size={18} />
             </Link>
             <Link
-              to="/visualize"
+              to="/process-matrix"
               className="inline-flex items-center gap-2 px-6 py-3 bg-white/20 text-white rounded-lg font-medium hover:bg-white/30 transition-colors"
             >
-              查看可视化
+              查看过程矩阵
             </Link>
           </div>
         </div>

src/pages/ProcessMatrixPage.tsx

@@ -31,7 +31,7 @@ export function ProcessMatrixPage() {
   }, [isFullScreen, setMatrixFullScreen])
 
   return (
-    <div className={clsx("space-y-6", isFullScreen && "fixed inset-0 z-50 bg-white dark:bg-gray-900 p-0 m-0 space-y-0")}>
+    <div className={clsx(isFullScreen ? "fixed inset-0 z-50 bg-white dark:bg-gray-900 p-0 m-0" : "space-y-6")}>
       {/* 隐藏滚动条的样式 */}
       {isFullScreen && (
         <style>{`