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/cli/exec.js

@@ -0,0 +1,23 @@
+import { NonZeroExitError, x } from "tinyexec";
+function exec(command, args, options) {
+  return x(command, args, {
+    throwOnError: true,
+    ...options
+  }).then(
+    (o) => o,
+    (e) => {
+      if (e instanceof NonZeroExitError) {
+        const fullCommand = args?.length ? `${command} ${args.map((a) => a.includes(" ") ? `"${a}"` : a).join(" ")}` : command;
+        const message = `The command \`${fullCommand}\` exited with code ${e.exitCode}`;
+        const newError = new Error(message, e.cause ? { cause: e.cause } : void 0);
+        newError.stderr = e.output?.stderr;
+        newError.stdout = e.output?.stdout;
+        throw newError;
+      }
+      throw e;
+    }
+  );
+}
+export {
+  exec
+};