feat(frontend): 新增我的个人页面并优化站点导航

- 新增完整的我的页面，包含用户资料展示、使用统计和个人信息编辑功能
- 添加收藏和卡册的快捷入口网格
- 简化导航栏，将原分散的个人中心、我的收藏、我的卡册入口合并为单个「我的」标签
- 编写新页面对应的CSS样式并更新静态资源版本号
- 在数学人生页面添加葫芦侠行的快捷跳转入口

static/js/desktop.js

@@ -7,7 +7,7 @@ let cardState={owned:[],draws:0,lastDaily:'',knowledgeRead:0,drawHistory:[]};
 let _lang=localStorage.getItem('mb_lang')||'zh';
 
 // ===== i18n =====
-const I18N={zh:{home:'首页',discover:'发现',toolbox:'工具箱',knowledge:'知识卡片',story:'葫芦侠行',simulator:'数学人生',favorites:'我的收藏',profile:'个人中心',search:'搜索内容...',guest:'游客用户',
+const I18N={zh:{home:'首页',discover:'发现',toolbox:'工具箱',knowledge:'知识卡片',story:'葫芦侠行',simulator:'数学人生',favorites:'我的收藏',profile:'个人中心',mine:'我的',search:'搜索内容...',guest:'游客用户',
   heroTitle:'葫芦数学 · 用玩的方式打开数学',heroSub:'数学不是公式，是你理解世界的方式',heroCTA:'开始探索 →',
   exploreTitle:'探索数学的万千可能',tryTitle:'试试这些',
   mbtiName:'MathBTI 数学人格',mbtiDesc:'12题发现你的数学人格，领养专属数学小人 →',
@@ -66,7 +66,7 @@ const I18N={zh:{home:'首页',discover:'发现',toolbox:'工具箱',knowledge:'
    staticAIToggleTitle:'AI数学助教',staticAIHeader:'💬 AI 数学助教',
    staticAIWelcome:'你好！我是葫芦数学的AI助教 👋<br><br>试试问我：学数学对学医有什么用？',
    staticAIPlaceholder:'输入问题...',staticMbtiTooltip:'测测你的数学人格'},
- en:{home:'Home',discover:'Discover',toolbox:'Toolbox',knowledge:'Cards',story:'HuLu Quest',simulator:'Math Life',favorites:'Favorites',profile:'Profile',search:'Search...',guest:'Guest',
+ en:{home:'Home',discover:'Discover',toolbox:'Toolbox',knowledge:'Cards',story:'HuLu Quest',simulator:'Math Life',favorites:'Favorites',profile:'Profile',mine:'Mine',search:'Search...',guest:'Guest',
   heroTitle:'Hulu Math · Play your way into math',heroSub:'Math isn\'t formulas. It\'s how you make sense of things.',heroCTA:'Start Exploring →',
   exploreTitle:'Explore Math',tryTitle:'Try These',
   mbtiName:'MathBTI Personality Test',mbtiDesc:'12 questions. One math soul. Meet your sprite. →',
@@ -202,7 +202,7 @@ function navigateTo(p){
   const t=document.getElementById('page-'+p);if(t)t.classList.add('active');
   document.getElementById('mainContent').scrollTop=0;
   if(p==='home')loadHome();else if(p==='discover')loadDiscover();else if(p==='toolbox')loadToolbox();
-  else if(p==='knowledge')loadKnowledgePage();else if(p==='story')loadStory();else if(p==='simulator')loadSimulator();else if(p==='favorites')loadFavorites();else if(p==='profile')loadProfile();else if(p==='cards')loadCardsPage();
+  else if(p==='knowledge')loadKnowledgePage();else if(p==='story')loadStory();else if(p==='simulator')loadSimulator();else if(p==='favorites')loadFavorites();else if(p==='profile')loadProfile();else if(p==='cards')loadCardsPage();else if(p==='mine')loadMine();
 }
 
 // ===== Home (Desmos-style) =====
@@ -557,6 +557,29 @@ async function loadCardsPage(){
   grid.innerHTML=h;
 }
 
+// ===== Mine Page (我的 — 个人中心 + 收藏 + 卡册入口) =====
+async function loadMine(){
+  chatCtx={};
+  const c=document.getElementById('mineContent');
+  if(!c)return;
+  let p={nickname:'游客用户',avatar_emoji:'葫',avatar_color:'#5B6AF0'};
+  let s={watch_count:0,favorite_count:0};
+  try{
+    const[pr,sr]=await Promise.all([api('/api/user/profile?user_id='+USER_ID),api('/api/user/stats?user_id='+USER_ID)]);
+    if(pr.code===0&&pr.data)p=pr.data;
+    if(sr.code===0&&sr.data)s=sr.data;
+  }catch(e){}
+  c.innerHTML=
+    '<div class="page-header"><h1 class="page-title">👤 我的</h1></div>'+
+    '<div class="profile-card"><div class="profile-avatar-lg" style="background:rgba(255,255,255,.2)">'+esc(p.avatar_emoji||'葫')+'</div><div><div class="profile-name-lg">'+esc(p.nickname||'游客用户')+'</div><div class="profile-id-lg">ID: '+USER_ID+'</div></div></div>'+
+    '<div class="profile-stats-grid"><div class="profile-stat-card"><div class="num">'+s.watch_count+'</div><div class="label">观看次数</div></div><div class="profile-stat-card"><div class="num">'+s.favorite_count+'</div><div class="label">收藏数量</div></div></div>'+
+    '<div style="background:#fff;border-radius:16px;padding:16px 20px;box-shadow:0 1px 3px rgba(0,0,0,.04);margin-bottom:20px"><div style="font-weight:600;margin-bottom:12px">编辑资料</div><div style="display:flex;gap:12px;align-items:center;margin-bottom:12px"><span style="font-size:13px;color:#64748B">头像:</span><input id="editAvatar" style="padding:8px 12px;border:1.5px solid #E2E8F0;border-radius:10px;font-size:14px;width:80px" value="'+esc(p.avatar_emoji||'葫')+'"></div><div style="display:flex;gap:12px;align-items:center;margin-bottom:16px"><span style="font-size:13px;color:#64748B">昵称:</span><input id="editNickname" style="flex:1;padding:8px 12px;border:1.5px solid #E2E8F0;border-radius:10px;font-size:14px" value="'+esc(p.nickname||'')+'"></div><button onclick="sP()" style="padding:10px 28px;border-radius:12px;border:none;background:#5B6AF0;color:#fff;font-size:14px;font-weight:600;cursor:pointer">保存</button></div>'+
+    '<div class="mine-grid">'+
+      '<div class="mine-entry" onclick="navigateTo(\'favorites\')"><div class="mine-entry-icon">❤️</div><div class="mine-entry-body"><div class="mine-entry-name">我的收藏</div><div class="mine-entry-desc">已收藏的视频和知识卡片</div></div><span class="mine-entry-arrow">→</span></div>'+
+      '<div class="mine-entry" onclick="navigateTo(\'cards\')"><div class="mine-entry-icon">🎴</div><div class="mine-entry-body"><div class="mine-entry-name">我的卡册</div><div class="mine-entry-desc">收集全部16位数学人物 · '+cardState.owned.length+'/16</div></div><span class="mine-entry-arrow">→</span></div>'+
+    '</div>';
+}
+
 // ===== Pet Experience =====
 function getPet(){
   let pet=null;
@@ -923,6 +946,11 @@ function loadMathLife(){
         (t.ready?'':'<div class="ml-coming-badge">敬请期待</div>')+
       '</div>').join('')+
     '</div>'+
+    '<button class="ml-alumni-entry ml-story-entry" onclick="navigateTo(\'story\')">'+
+      '<span class="ml-alumni-entry-icon">⚔️</span>'+
+      '<span class="ml-alumni-entry-body"><b>葫芦侠行</b><small>北宋数学武侠互动文字冒险 · 8章93节点 · 8+种结局</small></span>'+
+      '<span class="ml-alumni-entry-arrow">→</span>'+
+    '</button>'+
     '<button class="ml-alumni-entry" onclick="openMathAlumni()">'+
       '<span class="ml-alumni-entry-icon">🎓</span>'+
       '<span class="ml-alumni-entry-body"><b>数学校友访谈</b><small>真实校友的大学四年 · Skill 剧本包</small></span>'+