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/i18n/fallback.js

@@ -0,0 +1,58 @@
+import { getPathByLocale } from "./index.js";
+function computeFallbackRoute(options) {
+  const {
+    pathname,
+    responseStatus,
+    fallback,
+    fallbackType,
+    locales,
+    defaultLocale,
+    strategy,
+    base
+  } = options;
+  if (responseStatus !== 404) {
+    return { type: "none" };
+  }
+  if (!fallback || Object.keys(fallback).length === 0) {
+    return { type: "none" };
+  }
+  const segments = pathname.split("/");
+  const urlLocale = segments.find((segment) => {
+    for (const locale of locales) {
+      if (typeof locale === "string") {
+        if (locale === segment) {
+          return true;
+        }
+      } else if (locale.path === segment) {
+        return true;
+      }
+    }
+    return false;
+  });
+  if (!urlLocale) {
+    return { type: "none" };
+  }
+  const fallbackKeys = Object.keys(fallback);
+  if (!fallbackKeys.includes(urlLocale)) {
+    return { type: "none" };
+  }
+  const fallbackLocale = fallback[urlLocale];
+  const pathFallbackLocale = getPathByLocale(fallbackLocale, locales);
+  let newPathname;
+  if (pathFallbackLocale === defaultLocale && strategy === "pathname-prefix-other-locales") {
+    if (pathname.includes(`${base}`)) {
+      newPathname = pathname.replace(`/${urlLocale}`, ``);
+    } else {
+      newPathname = pathname.replace(`/${urlLocale}`, `/`);
+    }
+  } else {
+    newPathname = pathname.replace(`/${urlLocale}`, `/${pathFallbackLocale}`);
+  }
+  return {
+    type: fallbackType,
+    pathname: newPathname
+  };
+}
+export {
+  computeFallbackRoute
+};