Frontend uudelleenrakennettu: Astro-komponentit, Wasm pääsäikeessä, ei Workeria

Vanha frontend siirretty temp/. Uusi rakenne:
- StatusBar.astro, Terminal.astro, Editor.astro, Guide.astro
- global.css erillinen
- Wasm pääsäikeessä (ei Worker — yksinkertainen, debugattava)
- Tab-completion, dropdown, projektikortti, Monaco, GUIDE.md
- Ei tokenisointia eikä koodilaboratoriota

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

network-poc/frontend/node_modules/astro/dist/vite-plugin-astro-server/route-guard.d.ts

@@ -0,0 +1,10 @@
+import type * as vite from 'vite';
+import type { AstroSettings } from '../types/astro.js';
+/**
+ * Middleware that prevents Vite from serving files that exist outside
+ * of srcDir and publicDir when accessed via direct URL navigation.
+ *
+ * This fixes the issue where files like /README.md are served
+ * when they exist at the project root but aren't part of Astro's routing.
+ */
+export declare function routeGuardMiddleware(settings: AstroSettings): vite.Connect.NextHandleFunction;