feat: 五项目业务实现并对接完成

- MES(B): 工单/BOM/备料/工序字典/PLC下发/拧紧/扫码报工/半成品/AGV/追溯逻辑，WMS与海康RCS客户端，看板Redis缓存API(概览/设备/进度/报警/趋势)+SSE
- WMS(C): JWT滑动续签、Excel导入、盘点、内部API、种子数据、独立Postgres配置
- WMS客户端(E): Go网关8891反向代理+内嵌Vue3十页
- 工位终端(D): SQLite本地缓存+模拟拧紧源+内嵌Vue3页面
- Dashboard(A): 看板数据改接MES内部缓存API，SSE实时刷新+vite代理
- 清理各项目球形磨遗留代码，新增部署手册.md

bj_power_wms_client/frontend/src/pages/Login.vue

@@ -0,0 +1,65 @@
+<script setup>
+import { reactive, ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { ElMessage } from 'element-plus'
+import request from '../utils/request'
+import { setSession } from '../utils/auth'
+
+const router = useRouter()
+const route = useRoute()
+
+const formRef = ref()
+const loading = ref(false)
+const form = reactive({ username: '', password: '' })
+const rules = {
+  username: [{ required: true, message: '请输入用户名', trigger: 'blur' }],
+  password: [{ required: true, message: '请输入密码', trigger: 'blur' }]
+}
+
+async function onSubmit() {
+  await formRef.value.validate()
+  loading.value = true
+  try {
+    const data = await request.post('/auth/login', { username: form.username, password: form.password })
+    if (!data?.token) throw new Error('登录响应缺少 token')
+    setSession(data.token, data.user || {})
+    ElMessage.success('登录成功')
+    const redirect = route.query.redirect
+    router.push(redirect && typeof redirect === 'string' ? redirect : '/')
+  } finally {
+    loading.value = false
+  }
+}
+</script>
+
+<template>
+  <div class="login-page">
+    <el-card class="card">
+      <div class="head">
+        <h2>北自所库房客户端</h2>
+        <p>请使用 WMS 账号登录</p>
+      </div>
+      <el-form ref="formRef" :model="form" :rules="rules" label-position="top" @keyup.enter="onSubmit">
+        <el-form-item label="用户名" prop="username">
+          <el-input v-model="form.username" placeholder="用户名" autofocus />
+        </el-form-item>
+        <el-form-item label="密码" prop="password">
+          <el-input v-model="form.password" type="password" show-password placeholder="密码" />
+        </el-form-item>
+        <el-button type="primary" class="btn" :loading="loading" @click="onSubmit">登 录</el-button>
+      </el-form>
+    </el-card>
+  </div>
+</template>
+
+<style scoped>
+.login-page {
+  height: 100vh; display: flex; align-items: center; justify-content: center;
+  background: linear-gradient(135deg, #1c3faa 0%, #0a1330 100%);
+}
+.card { width: 380px; }
+.head { text-align: center; margin-bottom: 14px; }
+.head h2 { margin: 0 0 6px; }
+.head p { margin: 0; color: #909399; font-size: 13px; }
+.btn { width: 100%; margin-top: 4px; }
+</style>