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/@astrojs/markdown-remark/dist/rehype-prism.js

@@ -0,0 +1,19 @@
+import { runHighlighterWithAstro } from "@astrojs/prism/dist/highlighter";
+import { highlightCodeBlocks } from "./highlight.js";
+const rehypePrism = (excludeLangs) => {
+  return async (tree) => {
+    await highlightCodeBlocks(
+      tree,
+      (code, language) => {
+        let { html, classLanguage } = runHighlighterWithAstro(language, code);
+        return Promise.resolve(
+          `<pre class="${classLanguage}" data-language="${language}"><code class="${classLanguage}">${html}</code></pre>`
+        );
+      },
+      excludeLangs
+    );
+  };
+};
+export {
+  rehypePrism
+};