commit remaining frontend updates

public/index.html

@@ -21,10 +21,33 @@
         <input type="password" id="loginPass" placeholder="请输入密码" autocomplete="current-password">
       </div>
       <button class="btn btn-primary" onclick="doLogin()">登 录</button>
+      <button class="btn btn-secondary" onclick="showRegisterPage()">注册账号</button>
       <div class="login-error" id="loginError"></div>
     </div>
   </div>
 
+  <!-- 注册页 -->
+  <div id="registerPage" class="page">
+    <div class="login-box">
+      <h1>注册账号</h1>
+      <div class="form-group">
+        <label>用户名</label>
+        <input type="text" id="registerUser" placeholder="请输入用户名" autocomplete="username">
+      </div>
+      <div class="form-group">
+        <label>密码</label>
+        <input type="password" id="registerPass" placeholder="请输入密码" autocomplete="new-password">
+      </div>
+      <div class="form-group">
+        <label>确认密码</label>
+        <input type="password" id="registerPassConfirm" placeholder="请再次输入密码" autocomplete="new-password">
+      </div>
+      <button class="btn btn-primary" onclick="doRegister()">注 册</button>
+      <button class="btn btn-secondary" onclick="showLoginPage()">返回登录</button>
+      <div class="login-error" id="registerError"></div>
+    </div>
+  </div>
+
   <!-- 首页 -->
   <div id="homePage" class="page">
     <div class="home-header">
@@ -457,7 +480,7 @@
   <div class="toast" id="toast"></div>
 
   <script src="js/app.js?v=20260224"></script>
-  <script src="js/auth.js"></script>
+  <script src="js/auth.js?v=20260428b"></script>
   <script src="js/autocomplete.js"></script>
   <script src="js/month-picker.js"></script>
   <script src="js/stats.js?v=20260326"></script>