feat: v0.7 全功能复刻与前端适配

后端:
- 产品价格本模块(型材/玻璃/五金/配件, 供报价取价)
- 报价单模块(BJ单号, 手动报价/样板算料/转订单)
- 售后单(问题描述必填, 对齐原站校验)与状态流转
- 量尺单(洞口尺寸清单)与阳光房订单(order_type=1)
- 个人中心: 资料/密码修改/邀请返利(HMC邀请码)
前端:
- 新增8页面: 产品/报价单/售后/量尺/阳光房/商城/使用指南/个人中心
- 登录页注册双Tab, 响应式侧边栏(<900px自动折叠)
- Element Plus 图标全局注册修复
- 共15个页面覆盖原站核心业务路由

frontend/src/views/AfterSaleView.vue

@@ -0,0 +1,96 @@
+<template>
+  <el-card>
+    <div class="toolbar">
+      <el-select v-model="status" placeholder="全部状态" clearable style="width:140px" @change="load">
+        <el-option :value="0" label="待处理" /><el-option :value="1" label="处理中" /><el-option :value="2" label="已完成" />
+      </el-select>
+      <el-button type="primary" @click="load">查询</el-button>
+      <div style="flex:1" />
+      <el-button type="primary" plain @click="openCreate">提交售后</el-button>
+    </div>
+    <el-table :data="rows" v-loading="loading" stripe>
+      <el-table-column prop="id" label="ID" width="70" />
+      <el-table-column prop="title" label="标题" min-width="120" />
+      <el-table-column prop="description" label="问题描述" min-width="200" show-overflow-tooltip />
+      <el-table-column prop="order_no" label="关联订单" width="150" />
+      <el-table-column label="状态" width="90">
+        <template #default="{ row }">
+          <el-tag size="small" :type="(['warning', 'primary', 'success'] as const)[row.status]">
+            {{ ['待处理', '处理中', '已完成'][row.status] }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="created_at" label="提交时间" width="170" />
+      <el-table-column label="操作" width="120" fixed="right">
+        <template #default="{ row }">
+          <el-button v-if="row.status !== 2" size="small" @click="advance(row)">
+            {{ row.status === 0 ? '开始处理' : '完成' }}</el-button>
+        </template>
+      </el-table-column>
+    </el-table>
+    <el-pagination style="margin-top:12px; justify-content:flex-end" background layout="total, prev, pager, next"
+                   :total="total" :page-size="page_size" v-model:current-page="page" @current-change="load" />
+
+    <el-dialog v-model="createVisible" title="提交售后" width="520px">
+      <el-form :model="form" label-width="80px">
+        <el-form-item label="标题"><el-input v-model="form.title" /></el-form-item>
+        <el-form-item label="问题描述"><el-input v-model="form.description" type="textarea" :rows="3" /></el-form-item>
+        <el-form-item label="关联订单"><el-input v-model="form.order_no" placeholder="订单号(可选)" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="createVisible = false">取消</el-button>
+        <el-button type="primary" @click="save">提交</el-button>
+      </template>
+    </el-dialog>
+  </el-card>
+</template>
+
+<script setup lang="ts">
+import { onMounted, reactive, ref } from 'vue'
+import { ElMessage } from 'element-plus'
+import { api } from '../api'
+
+const rows = ref<any[]>([])
+const total = ref(0)
+const page = ref(1)
+const page_size = 15
+const status = ref<number | undefined>()
+const loading = ref(false)
+const createVisible = ref(false)
+const form = reactive({ title: '', description: '', order_no: '' })
+
+async function load() {
+  loading.value = true
+  try {
+    const qs = `page=${page.value}&page_size=${page_size}${status.value !== undefined ? `&status=${status.value}` : ''}`
+    const d = await api<any>('get', `/api/after_sales?${qs}`)
+    rows.value = d.data
+    total.value = d.total
+  } finally { loading.value = false }
+}
+
+function openCreate() {
+  Object.assign(form, { title: '', description: '', order_no: '' })
+  createVisible.value = true
+}
+
+async function save() {
+  if (!form.description.trim()) return ElMessage.warning('问题描述必填')
+  await api('post', '/api/after_sales', form)
+  ElMessage.success('已提交')
+  createVisible.value = false
+  load()
+}
+
+async function advance(row: any) {
+  const next = row.status === 0 ? 1 : 2
+  await api('put', `/api/after_sales/${row.id}`, { status: next })
+  ElMessage.success('状态已更新')
+  load()
+}
+
+onMounted(load)
+</script>
+
+<style scoped>
+.toolbar { display: flex; gap: 10px; margin-bottom: 12px; }
+</style>