feat: project scaffold + bridge + maplibre engine

- Vite + Vue 3 + TypeScript strict
- @yuto-water/js-bridge (types, detector, browser provider)
- MapLibre engine (MapManager singleton, MapFactory, LayerFactory)
- Map composables (useMap, useLayer, usePopup)
- Tianditu tile source, 6 layer type factory
- SCSS design tokens (water-blue theme, dark mode)
- Vant 4, maplibre-gl, axios, pinia, echarts deps
- Build passes (vue-tsc + vite)

vite.config.ts

@@ -0,0 +1,41 @@
+import { resolve } from 'node:path'
+import { defineConfig, loadEnv } from 'vite'
+import vue from '@vitejs/plugin-vue'
+
+// https://vite.dev/config/
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+
+  return {
+    plugins: [vue()],
+
+    resolve: {
+      alias: {
+        '@': resolve(__dirname, 'src'),
+      },
+    },
+
+    css: {
+      preprocessorOptions: {
+        scss: {
+          additionalData: `@use "@/styles/variables.scss" as *;`,
+        },
+      },
+    },
+
+    server: {
+      host: '0.0.0.0',
+      port: Number(env.VITE_PORT) || 5173,
+      hmr: {
+        host: '0.0.0.0',
+      },
+      proxy: {
+        '/dev-api': {
+          target: 'http://10.10.10.189:81/icp-api',
+          changeOrigin: true,
+          rewrite: (path) => path.replace(/^\/dev-api/, ''),
+        },
+      },
+    },
+  }
+})