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/retext-stringify/lib/index.js

@@ -0,0 +1,27 @@
+/**
+ * @typedef {import('nlcst').Root} Root
+ */
+
+import {toString} from 'nlcst-to-string'
+
+/**
+ * Add support for serializing natural language.
+ *
+ * @returns {undefined}
+ *   Nothing.
+ */
+export default function retextStringify() {
+  // eslint-disable-next-line unicorn/no-this-assignment
+  const self =
+    /** @type {import('unified').Processor<undefined, undefined, undefined, Root, string>} */ (
+      // @ts-expect-error -- TS in JSDoc doesn’t understand `this`.
+      this
+    )
+
+  self.compiler = compiler
+}
+
+/** @type {import('unified').Compiler<Root, string>} */
+function compiler(tree) {
+  return toString(tree)
+}