feat: 迁入 MiGu.Server、平台前端与车辆列表 reflection 回退

从 Simple-FR 拆出 Platform.Server 并重命名为 MiGu.Server；frontends 源码与构建脚本迁入本仓库。地图监控在 projection/cars 失败或为空时回退 reflection 车辆列表；Simple 仓库已移除旧 Platform.Server。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontends/apps/simple-platform-vue/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "simple-platform-vue",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Simple-FR 管理员 + 运营双视图前端（admin/monitor 单工程切换）。",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc --noEmit && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext .ts,.vue --fix"
+  },
+  "dependencies": {
+    "@element-plus/icons-vue": "^2.3.1",
+    "axios": "^1.7.7",
+    "echarts": "^5.5.1",
+    "element-plus": "^2.8.4",
+    "pinia": "^2.2.4",
+    "vue": "^3.5.12",
+    "vue-router": "^4.4.5"
+  },
+  "devDependencies": {
+    "@types/node": "^22.7.7",
+    "@vitejs/plugin-vue": "^5.1.4",
+    "typescript": "^5.6.3",
+    "unplugin-auto-import": "^0.18.3",
+    "unplugin-vue-components": "^0.27.4",
+    "vite": "^5.4.10",
+    "vue-tsc": "^2.1.6"
+  }
+}