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/mdast-util-to-hast/lib/revert.js

@@ -0,0 +1,49 @@
+/**
+ * @import {ElementContent} from 'hast'
+ * @import {Reference, Nodes} from 'mdast'
+ * @import {State} from './state.js'
+ */
+
+/**
+ * Return the content of a reference without definition as plain text.
+ *
+ * @param {State} state
+ *   Info passed around.
+ * @param {Extract<Nodes, Reference>} node
+ *   Reference node (image, link).
+ * @returns {Array<ElementContent>}
+ *   hast content.
+ */
+export function revert(state, node) {
+  const subtype = node.referenceType
+  let suffix = ']'
+
+  if (subtype === 'collapsed') {
+    suffix += '[]'
+  } else if (subtype === 'full') {
+    suffix += '[' + (node.label || node.identifier) + ']'
+  }
+
+  if (node.type === 'imageReference') {
+    return [{type: 'text', value: '![' + node.alt + suffix}]
+  }
+
+  const contents = state.all(node)
+  const head = contents[0]
+
+  if (head && head.type === 'text') {
+    head.value = '[' + head.value
+  } else {
+    contents.unshift({type: 'text', value: '['})
+  }
+
+  const tail = contents[contents.length - 1]
+
+  if (tail && tail.type === 'text') {
+    tail.value += suffix
+  } else {
+    contents.push({type: 'text', value: suffix})
+  }
+
+  return contents
+}