feat: 移除PDI和订单号字段，新增设备巡检模块

- 从物料跟踪页面移除订单号列和表单字段
- 从导航菜单移除PDI管理，添加设备巡检
- 新增InspectionLocation和InspectionRecord后端模型和API
- 新增设备巡检前端页面（左侧点位列表，右侧设备和历史记录）

frontend/src/views/Login.vue

@@ -0,0 +1,158 @@
+<template>
+  <div class="login-page">
+    <div class="login-wrap">
+      <div class="login-header">
+        <div class="login-logo">SMS <span>L2</span></div>
+        <div class="login-title">推拉酸洗线 L2 过程控制系统</div>
+        <div class="login-sub">PUSH-PULL PICKLING LINE MES</div>
+      </div>
+
+      <div class="login-form">
+        <div class="form-item">
+          <div class="form-label">用户名</div>
+          <input
+            v-model="form.username"
+            class="kv-input"
+            placeholder="请输入用户名"
+            @keyup.enter="handleLogin"
+          />
+        </div>
+        <div class="form-item">
+          <div class="form-label">密码</div>
+          <input
+            v-model="form.password"
+            type="password"
+            class="kv-input"
+            placeholder="请输入密码"
+            @keyup.enter="handleLogin"
+          />
+        </div>
+        <button
+          :class="['btn btn-primary', { loading }]"
+          style="width:100%;margin-top:20px;padding:9px;"
+          @click="handleLogin"
+        >
+          {{ loading ? '登录中...' : '登 录' }}
+        </button>
+        <div v-if="error" class="login-error">{{ error }}</div>
+      </div>
+
+      <div class="login-footer">
+        <span class="dot g"></span>系统就绪 &nbsp;|&nbsp; v1.0.0
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'Login',
+  data() {
+    return {
+      loading: false,
+      error: '',
+      form: { username: '', password: '' }
+    }
+  },
+  methods: {
+    async handleLogin() {
+      if (!this.form.username || !this.form.password) {
+        this.error = '请输入用户名和密码'
+        return
+      }
+      this.loading = true
+      this.error = ''
+      try {
+        await this.$store.dispatch('auth/login', this.form)
+        this.$router.push('/')
+      } catch {
+        this.error = '用户名或密码错误'
+      } finally {
+        this.loading = false
+      }
+    }
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+@import '@/assets/styles/variables';
+
+.login-page {
+  height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: $bg-primary;
+  background-image:
+    radial-gradient(ellipse at 20% 50%, rgba(0,120,212,.08) 0%, transparent 60%),
+    radial-gradient(ellipse at 80% 30%, rgba(0,200,255,.05) 0%, transparent 60%);
+}
+
+.login-wrap {
+  width: 380px;
+  background: $bg-card;
+  border: 1px solid $border;
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+.login-header {
+  padding: 32px 32px 24px;
+  background: $bg-panel;
+  border-bottom: 1px solid $border;
+  text-align: center;
+}
+
+.login-logo {
+  font-size: 20px;
+  font-weight: 700;
+  color: $sms-highlight;
+  letter-spacing: 2px;
+  margin-bottom: 8px;
+  span { color: $accent-yellow; }
+}
+
+.login-title {
+  font-size: 14px;
+  color: $text-primary;
+  font-weight: 600;
+  margin-bottom: 4px;
+}
+
+.login-sub {
+  font-size: 11px;
+  color: $text-muted;
+  letter-spacing: .5px;
+}
+
+.login-form {
+  padding: 24px 32px;
+}
+
+.form-item {
+  margin-bottom: 14px;
+  .form-label { color: $text-secondary; font-size: 12px; margin-bottom: 6px; }
+  .kv-input { padding: 8px 10px; }
+}
+
+.login-error {
+  margin-top: 10px;
+  font-size: 12px;
+  color: $accent-red;
+  text-align: center;
+}
+
+.login-footer {
+  padding: 10px 32px;
+  background: $bg-panel;
+  border-top: 1px solid $border;
+  font-size: 11px;
+  color: $text-muted;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+
+  .dot { width: 6px; height: 6px; border-radius: 50%; &.g { background: $accent-green; } }
+}
+</style>