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/fast-string-width/dist/index.d.ts

@@ -0,0 +1,4 @@
+import type { WidthOptions as Options } from 'fast-string-truncated-width';
+declare const fastStringWidth: (input: string, options?: Options) => number;
+export default fastStringWidth;
+export type { Options };

network-poc/frontend/node_modules/fast-string-width/dist/index.js

@@ -0,0 +1,14 @@
+/* IMPORT */
+import fastStringTruncatedWidth from 'fast-string-truncated-width';
+/* HELPERS */
+const NO_TRUNCATION = {
+    limit: Infinity,
+    ellipsis: '',
+    ellipsisWidth: 0,
+};
+/* MAIN */
+const fastStringWidth = (input, options = {}) => {
+    return fastStringTruncatedWidth(input, NO_TRUNCATION, options).width;
+};
+/* EXPORT */
+export default fastStringWidth;