refactor(join-us): adopt UPage layout components

The 'Join Us' page layout has been refactored to use the `<UPage>` and `<UPageBody>` components from Nuxt UI. This change ensures a consistent page structure with the rest of the application. Additionally,
quote styles in the script section have been standardized to double quotes.

app/pages/join-us/index.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-import { ref, reactive, computed, defineComponent, h } from 'vue';
-import { Icon } from '@iconify/vue';
+import { ref, reactive, computed, defineComponent, h } from "vue";
+import { Icon } from "@iconify/vue";
 import { vMaska } from "maska/vue";
 
 // Reka primitive parts we actually need
@@ -11,7 +11,7 @@ import {
   RadioGroupRoot,
   RadioGroupItem,
   RadioGroupIndicator,
-} from 'reka-ui';
+} from "reka-ui";
 
 /**
  * Local lightweight FormField wrapper:
@@ -19,7 +19,7 @@ import {
  * - renders: <Label for="..."> + slot(default) + error paragraph
  */
 const FormField = defineComponent({
-  name: 'FormField',
+  name: "FormField",
   props: {
     label: { type: String, required: false },
     error: { type: String, required: false },
@@ -28,13 +28,13 @@ const FormField = defineComponent({
   setup(props, { slots }) {
     return () =>
       h(
-        'div',
-        { class: 'grid gap-2' },
+        "div",
+        { class: "grid gap-2" },
         [
           props.label ? h(Label, { for: props.for }, () => props.label) : null,
           slots.default ? slots.default() : null,
           props.error
-            ? h('p', { class: 'text-sm text-red-600 mt-1' }, () => props.error)
+            ? h("p", { class: "text-sm text-red-600 mt-1" }, () => props.error)
             : null,
         ].filter(Boolean)
       );
@@ -45,30 +45,30 @@ const FormField = defineComponent({
 const currentYear = new Date().getFullYear();
 
 const form = reactive({
-  chineseName: '',
-  englishName: '',
-  ic: '',
-  email: '',
-  phone: '',
+  chineseName: "",
+  englishName: "",
+  ic: "",
+  email: "",
+  phone: "",
   gradYear: null as number | null,
   unknownGradYear: false,
-  educationLevel: '',
-  maritalStatus: '',
-  country: '',
-  address: '',
+  educationLevel: "",
+  maritalStatus: "",
+  country: "",
+  address: "",
 });
 
 const errors = reactive<Record<string, string>>({});
 
 const toUpperCaseEnglish = () => {
-  form.englishName = (form.englishName || '').toUpperCase();
+  form.englishName = (form.englishName || "").toUpperCase();
 };
 
 const graduationBatch = computed(() => {
   if (form.gradYear) {
-    if (form.educationLevel === '高中毕业') {
+    if (form.educationLevel === "高中毕业") {
       return form.gradYear - 1965;
-    } else if (form.educationLevel === '初中毕业') {
+    } else if (form.educationLevel === "初中毕业") {
       return form.gradYear - 1958;
     }
   }
@@ -76,25 +76,28 @@ const graduationBatch = computed(() => {
 });
 
 const validate = () => {
-  errors.chineseName = !form.chineseName ? '请输入中文姓名' : '';
-  errors.englishName = !form.englishName ? '请输入英文姓名' : '';
-  errors.ic = /^\d{6}-\d{2}-\d{4}$/.test(form.ic) ? '' : '格式应为 000000-00-0000';
+  errors.chineseName = !form.chineseName ? "请输入中文姓名" : "";
+  errors.englishName = !form.englishName ? "请输入英文姓名" : "";
+  errors.ic = /^\d{6}-\d{2}-\d{4}$/.test(form.ic)
+    ? ""
+    : "格式应为 000000-00-0000";
   errors.email =
-    (!form.email && form.country !== '马来西亚')
-      ? '国外居住必须填写电邮'
+    !form.email && form.country !== "马来西亚"
+      ? "国外居住必须填写电邮"
       : form.email && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(form.email)
-      ? '请输入有效的电邮地址'
-      : '';
+        ? "请输入有效的电邮地址"
+        : "";
   errors.phone =
-    !/^01\d{1}-\d{7,8}$/.test(form.phone) && !/^\+\d{1,3}\s?\d+$/.test(form.phone)
-      ? '请输入马来西亚号 (01x-xxxxxxx) 或带区号的号码'
-      : '';
-  errors.educationLevel = !form.educationLevel ? '请选择毕业层次' : '';
+    !/^01\d{1}-\d{7,8}$/.test(form.phone) &&
+    !/^\+\d{1,3}\s?\d+$/.test(form.phone)
+      ? "请输入马来西亚号 (01x-xxxxxxx) 或带区号的号码"
+      : "";
+  errors.educationLevel = !form.educationLevel ? "请选择毕业层次" : "";
   errors.gradYear =
-    !form.unknownGradYear && !form.gradYear ? '请输入毕业年份或勾选“不详”' : '';
-  errors.maritalStatus = !form.maritalStatus ? '请选择婚姻状态' : '';
-  errors.country = !form.country ? '请选择国家' : '';
-  errors.address = !form.address ? '请输入详细地址' : '';
+    !form.unknownGradYear && !form.gradYear ? "请输入毕业年份或勾选“不详”" : "";
+  errors.maritalStatus = !form.maritalStatus ? "请选择婚姻状态" : "";
+  errors.country = !form.country ? "请选择国家" : "";
+  errors.address = !form.address ? "请输入详细地址" : "";
 
   return Object.values(errors).every((e) => !e);
 };
@@ -102,204 +105,254 @@ const validate = () => {
 const handleSubmit = () => {
   if (validate()) {
     // 如果你已在根组件挂载 Reka 的 ToastProvider + useToast，可替换下面 alert 的实现（见备注）
-    alert('提交成功！理事会将尽快联系您。');
+    alert("提交成功！理事会将尽快联系您。");
   } else {
-    alert('请完善表单信息');
+    alert("请完善表单信息");
   }
 };
 </script>
 
 <template>
-  <div class="cursor-not-allowed fixed flex items-center justify-center min-h-screen min-w-screen bg-black opacity-50">
-    <p class="text-white text-2xl">此功能尚未开放，敬请期待。谢谢</p>
-  </div>
-  <div class="min-h-screen bg-primary py-10">
-    <div class="max-w-3xl mx-auto p-8 bg-white rounded-2xl shadow-lg">
-      <h1 class="text-3xl font-bold mb-6 text-center text-secondary">
-        永平中学校友会入会申请表
-      </h1>
+  <UPage class="bg-primary">
+    <div
+      class="cursor-not-allowed fixed flex items-center justify-center min-h-screen min-w-screen bg-black opacity-50"
+    >
+      <p class="text-white text-2xl">此功能尚未开放，敬请期待。谢谢</p>
+    </div>
+    <UPageBody>
+      <div class="max-w-3xl mx-auto p-8 bg-white rounded-2xl shadow-lg">
+        <h1 class="text-3xl font-bold mb-6 text-center text-secondary">
+          永平中学校友会入会申请表
+        </h1>
 
-      <p class="text-sm text-gray-600 my-6 text-center leading-relaxed">
-        兹申请加入成为永平中学校友会会员，愿遵守会规及议决案，并填此表为据。<br />
-        入会费 <span class="font-bold text-secondary">RM60 / 年</span>。<br />
-        填写此表格之后，会有理事联系您协商入会费事宜。
-      </p>
+        <p class="text-sm text-gray-600 my-6 text-center leading-relaxed">
+          兹申请加入成为永平中学校友会会员，愿遵守会规及议决案，并填此表为据。<br />
+          入会费 <span class="font-bold text-secondary">RM60 / 年</span>。<br />
+          填写此表格之后，会有理事联系您协商入会费事宜。
+        </p>
 
-      <form @submit.prevent="handleSubmit" class="space-y-6">
-        <!-- 中文姓名 -->
-        <FormField label="中文姓名" :error="errors.chineseName" for="chineseName">
-          <input
-            id="chineseName"
-            v-model="form.chineseName"
-            class="w-full border rounded px-3 py-2"
-            placeholder="请输入中文姓名"
-          />
-        </FormField>
-
-        <!-- 英文姓名 -->
-        <FormField label="英文姓名" :error="errors.englishName" for="englishName">
-          <input
-            id="englishName"
-            v-model="form.englishName"
-            @input="toUpperCaseEnglish"
-            class="w-full border rounded px-3 py-2"
-            placeholder="请输入英文姓名"
-          />
-        </FormField>
-
-        <!-- IC -->
-        <FormField label="IC" :error="errors.ic" for="ic">
-          <input
-            id="ic"
-            v-model="form.ic"
-            class="w-full border rounded px-3 py-2"
-            placeholder="000000-00-0000"
-            v-maska="'######-##-####'"
-          />
-        </FormField>
-
-        <!-- 电邮 -->
-        <FormField label="电邮" :error="errors.email" for="email">
-          <input
-            id="email"
-            v-model="form.email"
-            class="w-full border rounded px-3 py-2"
-            placeholder="选填 / 国外必填"
-          />
-        </FormField>
-
-        <!-- 电话 -->
-        <FormField label="电话" :error="errors.phone" for="phone">
-          <input
-            id="phone"
-            v-model="form.phone"
-            class="w-full border rounded px-3 py-2"
-            placeholder="请输入电话（WhatsApp 号码为佳）"
-          />
-        </FormField>
-
-        <!-- 毕业层次 (使用 Reka Radio primitives) -->
-        <FormField label="毕业层次" :error="errors.educationLevel" for="educationLevel">
-          <RadioGroupRoot
-            v-model="form.educationLevel"
-            class="flex flex-col gap-2"
-            name="educationLevel"
+        <form @submit.prevent="handleSubmit" class="space-y-6">
+          <!-- 中文姓名 -->
+          <FormField
+            label="中文姓名"
+            :error="errors.chineseName"
+            for="chineseName"
           >
-            <RadioGroupItem value="初中毕业" class="flex items-center gap-3">
-              <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
-                <span class="block w-2 h-2 rounded-full bg-secondary" />
-              </RadioGroupIndicator>
-              <span>初中毕业</span>
-            </RadioGroupItem>
-
-            <RadioGroupItem value="高中毕业" class="flex items-center gap-3">
-              <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
-                <span class="block w-2 h-2 rounded-full bg-secondary" />
-              </RadioGroupIndicator>
-              <span>高中毕业</span>
-            </RadioGroupItem>
-
-            <RadioGroupItem value="辍学/转学肄业" class="flex items-center gap-3">
-              <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
-                <span class="block w-2 h-2 rounded-full bg-secondary" />
-              </RadioGroupIndicator>
-              <span>辍学/转学肄业</span>
-            </RadioGroupItem>
-
-            <RadioGroupItem value="不确定" class="flex items-center gap-3">
-              <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
-                <span class="block w-2 h-2 rounded-full bg-secondary" />
-              </RadioGroupIndicator>
-              <span>不确定</span>
-            </RadioGroupItem>
-          </RadioGroupRoot>
-        </FormField>
-
-        <!-- 毕业年份 -->
-        <FormField label="毕业年份" :error="errors.gradYear" for="gradYear">
-          <div class="flex items-center gap-3">
             <input
-              id="gradYear"
-              type="number"
-              v-model="form.gradYear"
-              :min="1957"
-              :max="currentYear"
-              :disabled="form.unknownGradYear"
-              class="w-32 border rounded px-3 py-2"
+              id="chineseName"
+              v-model="form.chineseName"
+              class="w-full border rounded px-3 py-2"
+              placeholder="请输入中文姓名"
             />
-            <label class="flex items-center gap-2 select-none">
-              <CheckboxRoot v-model="form.unknownGradYear" class="w-5 h-5 rounded border flex items-center justify-center">
-                <CheckboxIndicator class="flex items-center justify-center w-full h-full">
-                  <Icon icon="radix-icons:check" class="h-4 w-4 text-secondary" />
-                </CheckboxIndicator>
-              </CheckboxRoot>
-              <span>毕业年份不详</span>
-            </label>
+          </FormField>
 
-            <span class="text-sm text-gray-500" v-if="graduationBatch">
-              您是第 <span class="font-bold">{{ graduationBatch }}</span> 届毕业生
-            </span>
-          </div>
-        </FormField>
+          <!-- 英文姓名 -->
+          <FormField
+            label="英文姓名"
+            :error="errors.englishName"
+            for="englishName"
+          >
+            <input
+              id="englishName"
+              v-model="form.englishName"
+              @input="toUpperCaseEnglish"
+              class="w-full border rounded px-3 py-2"
+              placeholder="请输入英文姓名"
+            />
+          </FormField>
 
-        <!-- 婚姻状态 -->
-        <FormField label="婚姻状态" :error="errors.maritalStatus" for="maritalStatus">
-          <div class="flex flex-col gap-2">
-            <RadioGroupRoot v-model="form.maritalStatus" name="maritalStatus">
-              <RadioGroupItem value="未婚" class="flex items-center gap-3">
-                <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
+          <!-- IC -->
+          <FormField label="IC" :error="errors.ic" for="ic">
+            <input
+              id="ic"
+              v-model="form.ic"
+              class="w-full border rounded px-3 py-2"
+              placeholder="000000-00-0000"
+              v-maska="'######-##-####'"
+            />
+          </FormField>
+
+          <!-- 电邮 -->
+          <FormField label="电邮" :error="errors.email" for="email">
+            <input
+              id="email"
+              v-model="form.email"
+              class="w-full border rounded px-3 py-2"
+              placeholder="选填 / 国外必填"
+            />
+          </FormField>
+
+          <!-- 电话 -->
+          <FormField label="电话" :error="errors.phone" for="phone">
+            <input
+              id="phone"
+              v-model="form.phone"
+              class="w-full border rounded px-3 py-2"
+              placeholder="请输入电话（WhatsApp 号码为佳）"
+            />
+          </FormField>
+
+          <!-- 毕业层次 (使用 Reka Radio primitives) -->
+          <FormField
+            label="毕业层次"
+            :error="errors.educationLevel"
+            for="educationLevel"
+          >
+            <RadioGroupRoot
+              v-model="form.educationLevel"
+              class="flex flex-col gap-2"
+              name="educationLevel"
+            >
+              <RadioGroupItem value="初中毕业" class="flex items-center gap-3">
+                <RadioGroupIndicator
+                  class="w-4 h-4 rounded-full border flex items-center justify-center"
+                >
                   <span class="block w-2 h-2 rounded-full bg-secondary" />
                 </RadioGroupIndicator>
-                <span>未婚</span>
+                <span>初中毕业</span>
               </RadioGroupItem>
-              <RadioGroupItem value="已婚" class="flex items-center gap-3">
-                <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
+
+              <RadioGroupItem value="高中毕业" class="flex items-center gap-3">
+                <RadioGroupIndicator
+                  class="w-4 h-4 rounded-full border flex items-center justify-center"
+                >
                   <span class="block w-2 h-2 rounded-full bg-secondary" />
                 </RadioGroupIndicator>
-                <span>已婚</span>
+                <span>高中毕业</span>
               </RadioGroupItem>
-              <RadioGroupItem value="其他" class="flex items-center gap-3">
-                <RadioGroupIndicator class="w-4 h-4 rounded-full border flex items-center justify-center">
+
+              <RadioGroupItem
+                value="辍学/转学肄业"
+                class="flex items-center gap-3"
+              >
+                <RadioGroupIndicator
+                  class="w-4 h-4 rounded-full border flex items-center justify-center"
+                >
                   <span class="block w-2 h-2 rounded-full bg-secondary" />
                 </RadioGroupIndicator>
-                <span>其他</span>
+                <span>辍学/转学肄业</span>
+              </RadioGroupItem>
+
+              <RadioGroupItem value="不确定" class="flex items-center gap-3">
+                <RadioGroupIndicator
+                  class="w-4 h-4 rounded-full border flex items-center justify-center"
+                >
+                  <span class="block w-2 h-2 rounded-full bg-secondary" />
+                </RadioGroupIndicator>
+                <span>不确定</span>
               </RadioGroupItem>
             </RadioGroupRoot>
-          </div>
-        </FormField>
+          </FormField>
 
-        <!-- 国家（原生 select，简单且稳定） -->
-        <FormField label="国家" :error="errors.country" for="country">
-          <select id="country" v-model="form.country" class="w-full border rounded px-3 py-2">
-            <option value="" disabled>请选择国家</option>
-            <option>马来西亚</option>
-            <option>新加坡</option>
-            <option>中国</option>
-            <option>美国</option>
-            <option>其他</option>
-          </select>
-        </FormField>
+          <!-- 毕业年份 -->
+          <FormField label="毕业年份" :error="errors.gradYear" for="gradYear">
+            <div class="flex items-center gap-3">
+              <input
+                id="gradYear"
+                type="number"
+                v-model="form.gradYear"
+                :min="1957"
+                :max="currentYear"
+                :disabled="form.unknownGradYear"
+                class="w-32 border rounded px-3 py-2"
+              />
+              <label class="flex items-center gap-2 select-none">
+                <CheckboxRoot
+                  v-model="form.unknownGradYear"
+                  class="w-5 h-5 rounded border flex items-center justify-center"
+                >
+                  <CheckboxIndicator
+                    class="flex items-center justify-center w-full h-full"
+                  >
+                    <Icon
+                      icon="radix-icons:check"
+                      class="h-4 w-4 text-secondary"
+                    />
+                  </CheckboxIndicator>
+                </CheckboxRoot>
+                <span>毕业年份不详</span>
+              </label>
 
-        <!-- 详细地址 -->
-        <FormField label="详细地址" :error="errors.address" for="address">
-          <textarea
-            id="address"
-            v-model="form.address"
-            class="w-full border rounded px-3 py-2"
-            placeholder="请输入现居详细地址"
-            rows="4"
-          />
-        </FormField>
+              <span class="text-sm text-gray-500" v-if="graduationBatch">
+                您是第
+                <span class="font-bold">{{ graduationBatch }}</span> 届毕业生
+              </span>
+            </div>
+          </FormField>
 
-        <div class="text-center mt-8">
-          <button
-            type="submit"
-            class="bg-secondary text-white font-bold px-8 py-2 rounded-xl shadow hover:scale-105 transition"
+          <!-- 婚姻状态 -->
+          <FormField
+            label="婚姻状态"
+            :error="errors.maritalStatus"
+            for="maritalStatus"
           >
-            提交申请
-          </button>
-        </div>
-      </form>
-    </div>
-  </div>
+            <div class="flex flex-col gap-2">
+              <RadioGroupRoot v-model="form.maritalStatus" name="maritalStatus">
+                <RadioGroupItem value="未婚" class="flex items-center gap-3">
+                  <RadioGroupIndicator
+                    class="w-4 h-4 rounded-full border flex items-center justify-center"
+                  >
+                    <span class="block w-2 h-2 rounded-full bg-secondary" />
+                  </RadioGroupIndicator>
+                  <span>未婚</span>
+                </RadioGroupItem>
+                <RadioGroupItem value="已婚" class="flex items-center gap-3">
+                  <RadioGroupIndicator
+                    class="w-4 h-4 rounded-full border flex items-center justify-center"
+                  >
+                    <span class="block w-2 h-2 rounded-full bg-secondary" />
+                  </RadioGroupIndicator>
+                  <span>已婚</span>
+                </RadioGroupItem>
+                <RadioGroupItem value="其他" class="flex items-center gap-3">
+                  <RadioGroupIndicator
+                    class="w-4 h-4 rounded-full border flex items-center justify-center"
+                  >
+                    <span class="block w-2 h-2 rounded-full bg-secondary" />
+                  </RadioGroupIndicator>
+                  <span>其他</span>
+                </RadioGroupItem>
+              </RadioGroupRoot>
+            </div>
+          </FormField>
+
+          <!-- 国家（原生 select，简单且稳定） -->
+          <FormField label="国家" :error="errors.country" for="country">
+            <select
+              id="country"
+              v-model="form.country"
+              class="w-full border rounded px-3 py-2"
+            >
+              <option value="" disabled>请选择国家</option>
+              <option>马来西亚</option>
+              <option>新加坡</option>
+              <option>中国</option>
+              <option>美国</option>
+              <option>其他</option>
+            </select>
+          </FormField>
+
+          <!-- 详细地址 -->
+          <FormField label="详细地址" :error="errors.address" for="address">
+            <textarea
+              id="address"
+              v-model="form.address"
+              class="w-full border rounded px-3 py-2"
+              placeholder="请输入现居详细地址"
+              rows="4"
+            />
+          </FormField>
+
+          <div class="text-center mt-8">
+            <button
+              type="submit"
+              class="bg-secondary text-white font-bold px-8 py-2 rounded-xl shadow hover:scale-105 transition"
+            >
+              提交申请
+            </button>
+          </div>
+        </form>
+      </div>
+    </UPageBody>
+  </UPage>
 </template>