Scaffold pinned Svelte frontend toolchain

Add a strict TypeScript and Vite workspace with reproducible Node, npm, and dependency versions plus Make targets for checking and building it.

web/vite.config.ts

@@ -0,0 +1,15 @@
+import { svelte } from '@sveltejs/vite-plugin-svelte';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  plugins: [svelte()],
+  build: {
+    manifest: true,
+    sourcemap: true
+  },
+  server: {
+    proxy: {
+      '/api': 'http://127.0.0.1:8080'
+    }
+  }
+});