feat(theme-system): F006 后台主题配置页

- src/views/theme/ThemeConfigView.vue: 4 套主题色卡 + preview + 一键保存
- router: /sys/theme-config 路由
- menu-labels: 系统设置下加主题配置菜单项 (Brush icon)
- 后端依赖: GET /sys/openapi/theme/current + POST /sys/openapi/theme/update?theme=X

src/config/menu-labels.ts

@@ -145,6 +145,7 @@ export const MENU_LABELS: MenuLabel[] = [
   { url: 'sys/dict-type',                 label: '字典类型',       icon: 'Collection', path: '/sys/dict',                sort: 412 },
   { url: 'sys/notice',                    label: '通知公告',       icon: 'Bell',       path: '/sys/notice',               sort: 413 },
   { url: 'sys/params',                    label: '参数配置',       icon: 'Setting',    path: '/sys/params',               sort: 414 },
+  { url: 'sys/theme-config',             label: '主题配置',       icon: 'Brush',      path: '/sys/theme-config',        sort: 415 },
   { url: 'message/mail-template',         label: '邮件模板',       icon: 'Document',   path: '/message/mail-template',    sort: 803 },
   { url: 'message/mail-log',              label: '邮件日志',       icon: 'List',       path: '/message/mail-log',         sort: 804 },
   { url: 'message/sms-log',               label: '短信日志',       icon: 'List',       path: '/message/sms-log',          sort: 805 },

src/router/index.ts

@@ -250,6 +250,7 @@ const routes: RouteRecordRaw[] = [
   { path: '/sys/log/error', component: () => import('@/modules/sys/LogErrorView.vue'), meta: { title: '异常日志' } },
   { path: '/sys/notice', component: () => import('@/modules/generic/MockTableView.vue'), props: () => ({ configKey: 'sys-notice' }), meta: { title: '通知公告' } },
     { path: '/sys/params', component: () => import('@/modules/generic/MockTableView.vue'), props: () => ({ configKey: 'sys-params' }), meta: { title: '参数配置' } },
+  { path: '/sys/theme-config', component: () => import('@/views/theme/ThemeConfigView.vue'), meta: { title: '主题配置' } },
   { path: '/sys/notice-user', component: () => import('@/modules/generic/MockTableView.vue'), props: () => ({ configKey: 'sys-notice-user' }), meta: { title: '用户通知' } },
   { path: '/sys/userManagement', component: () => import('@/modules/generic/MockTableView.vue'), props: () => ({ configKey: 'sys-userManagement' }), meta: { title: '全国运营中心' } },
   // user 9 个

src/views/theme/ThemeConfigView.vue

@@ -0,0 +1,178 @@
+<!--
+ * F006 主题配置 (管理后台)
+ * - 选 4 套预设主题之一，应用到 pc-前端-v2 全站
+ * - 后端接口:
+ *   GET  /sys/openapi/theme/current  → { theme: "industrial-blue", available: [...] }
+ *   POST /sys/openapi/theme/update?theme=xxx 切换主题
+ * - 切换后 pc-前端-v2 下次刷新或主页轮询时会拿到最新主题
+ -->
+<script setup lang="ts">
+import { ref, computed, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import PageHeader from '@/components/PageHeader/PageHeader.vue'
+import { httpGet, httpPost } from '@/utils/request'
+
+interface Theme {
+  key: string
+  label: string
+  description: string
+  primary: string
+  'primary-container': string
+  secondary: string
+  surface: string
+  'text-primary': string
+  border: string
+}
+
+const themes = ref<Theme[]>([
+  {
+    key: 'industrial-blue',
+    label: '工业蓝',
+    description: '默认主题，适用于工业品 B2B 大宗交易场景',
+    primary: '#0B5394', 'primary-container': '#E8F0FA',
+    secondary: '#E07B00', surface: '#FFFFFF',
+    'text-primary': '#1A1F2C', border: '#E2E6EE',
+  },
+  {
+    key: 'steel-red',
+    label: '钢红',
+    description: '国企/政策导向客户首选，庄重正式',
+    primary: '#A8202E', 'primary-container': '#FAE8EB',
+    secondary: '#C99B30', surface: '#FFFFFF',
+    'text-primary': '#1A1F2C', border: '#EFE2E4',
+  },
+  {
+    key: 'forest-green',
+    label: '森林绿',
+    description: '能源/碳中和/化工场景，传递可持续发展',
+    primary: '#1F6E4D', 'primary-container': '#E5F2EC',
+    secondary: '#D4A017', surface: '#FFFFFF',
+    'text-primary': '#1A1F2C', border: '#E2EAE5',
+  },
+  {
+    key: 'midnight-slate',
+    label: '暗夜深灰',
+    description: '数据型暗模式，适合长时间盯盘的运营人员',
+    primary: '#3B82F6', 'primary-container': '#1E293B',
+    secondary: '#60A5FA', surface: '#0F172A',
+    'text-primary': '#F1F5F9', border: '#334155',
+  },
+])
+
+const current = ref<string>('')
+const preview = ref<string>('')  // 用户选中但未保存
+const saving = ref(false)
+const loading = ref(false)
+
+const updateTime = ref('')
+
+async function load() {
+  loading.value = true
+  try {
+    const res: any = await httpGet('/sys/openapi/theme/current')
+    if (res.code === 0) {
+      current.value = res.data.theme
+      preview.value = res.data.theme
+      updateTime.value = new Date().toLocaleString('zh-CN')
+    }
+  } catch (e) {
+    ElMessage.error('加载当前主题失败: ' + (e as Error).message)
+  } finally {
+    loading.value = false
+  }
+}
+
+async function save() {
+  if (!preview.value) return
+  saving.value = true
+  try {
+    const res: any = await httpPost(`/sys/openapi/theme/update?theme=${preview.value}`)
+    if (res.code === 0) {
+      current.value = preview.value
+      updateTime.value = new Date().toLocaleString('zh-CN')
+      ElMessage.success(`主题已切换为「${findByKey(preview.value)?.label}」，pc-前端-v2 下次访问将自动应用`)
+    } else {
+      ElMessage.error(res.msg || '保存失败')
+    }
+  } catch (e: any) {
+    ElMessage.error('保存失败: ' + e.message)
+  } finally {
+    saving.value = false
+  }
+}
+
+function findByKey(key: string) {
+  return themes.value.find(t => t.key === key)
+}
+
+const dirty = computed(() => preview.value !== current.value)
+
+onMounted(load)
+</script>
+
+<template>
+  <PageHeader title="主题配置" :sub="`当前生效主题 · ${findByKey(current)?.label || '加载中'} · 更新于 ${updateTime}`">
+    <div class="flex gap-2 items-center">
+      <el-tag v-if="dirty" type="warning" effect="plain">有未保存的更改</el-tag>
+      <el-button type="primary" :disabled="!dirty || saving" :loading="saving" @click="save">
+        保存并应用
+      </el-button>
+    </div>
+  </PageHeader>
+
+  <div v-loading="loading" class="grid grid-cols-1 lg:grid-cols-2 gap-5 mt-5">
+    <div
+      v-for="theme in themes"
+      :key="theme.key"
+      class="rounded-2xl border-2 transition-all cursor-pointer overflow-hidden hover:-translate-y-1 hover:shadow-xl"
+      :class="preview === theme.key
+        ? 'border-primary shadow-lg shadow-primary/20'
+        : 'border-border'"
+      @click="preview = theme.key"
+    >
+      <!-- 预览头 -->
+      <div
+        class="h-24 flex items-center justify-between px-5 text-white"
+        :style="{ background: `linear-gradient(135deg, ${theme.primary}, ${theme.secondary})` }"
+      >
+        <div>
+          <div class="text-lg font-bold">{{ theme.label }}</div>
+          <div class="text-xs opacity-80 mt-1">{{ theme.key }}</div>
+        </div>
+        <div class="flex items-center gap-2">
+          <el-icon v-if="preview === theme.key" :size="22"><Check /></el-icon>
+          <el-tag v-if="current === theme.key" type="success" effect="dark" size="small">当前生效</el-tag>
+        </div>
+      </div>
+
+      <!-- Preview mock -->
+      <div class="p-5 space-y-3" :style="{ backgroundColor: theme.surface, color: theme['text-primary'] }">
+        <div class="flex items-center gap-2">
+          <div class="w-8 h-8 rounded-lg flex items-center justify-center text-white font-bold"
+            :style="{ backgroundColor: theme.primary }">M</div>
+          <div class="font-bold text-sm">LOGO 主品牌色</div>
+        </div>
+        <div class="text-xs opacity-70">{{ theme.description }}</div>
+        <div class="flex gap-2 mt-3">
+          <button class="px-4 py-1.5 rounded-lg text-xs font-bold text-white"
+            :style="{ backgroundColor: theme.primary }">主按钮</button>
+          <button class="px-4 py-1.5 rounded-lg text-xs font-bold border-2"
+            :style="{ borderColor: theme.primary, color: theme.primary }">描边按钮</button>
+          <span class="px-3 py-1 rounded text-xs font-bold"
+            :style="{ backgroundColor: theme['primary-container'], color: theme.primary }">标签</span>
+        </div>
+        <div class="text-[10px] opacity-50 pt-2 border-t" :style="{ borderColor: theme.border }">
+          HEX: {{ theme.primary }} · {{ theme.secondary }} · {{ theme['text-primary'] }}
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <el-alert
+    class="mt-6"
+    type="info"
+    :closable="false"
+    title="关于主题切换"
+    description="点击主题卡片预览，保存后 pc-前端-v2 的所有页面（包括其他用户正在浏览）将在下次请求 / 重载时生效。无需重启服务。"
+  />
+</template>