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/prismjs/components/prism-racket.js

@@ -0,0 +1,18 @@
+Prism.languages.racket = Prism.languages.extend('scheme', {
+	'lambda-parameter': {
+		// the racket lambda syntax is a lot more complex, so we won't even attempt to capture it.
+		// this will just prevent false positives of the `function` pattern
+		pattern: /([(\[]lambda\s+[(\[])[^()\[\]'\s]+/,
+		lookbehind: true
+	}
+});
+
+Prism.languages.insertBefore('racket', 'string', {
+	'lang': {
+		pattern: /^#lang.+/m,
+		greedy: true,
+		alias: 'keyword'
+	}
+});
+
+Prism.languages.rkt = Prism.languages.racket;