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-markdown/lib/handle/emphasis.js

@@ -0,0 +1,69 @@
+/**
+ * @import {Info, State} from 'mdast-util-to-markdown'
+ * @import {Emphasis, Parents} from 'mdast'
+ */
+
+import {checkEmphasis} from '../util/check-emphasis.js'
+import {encodeCharacterReference} from '../util/encode-character-reference.js'
+import {encodeInfo} from '../util/encode-info.js'
+
+emphasis.peek = emphasisPeek
+
+/**
+ * @param {Emphasis} node
+ * @param {Parents | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function emphasis(node, _, state, info) {
+  const marker = checkEmphasis(state)
+  const exit = state.enter('emphasis')
+  const tracker = state.createTracker(info)
+  const before = tracker.move(marker)
+
+  let between = tracker.move(
+    state.containerPhrasing(node, {
+      after: marker,
+      before,
+      ...tracker.current()
+    })
+  )
+  const betweenHead = between.charCodeAt(0)
+  const open = encodeInfo(
+    info.before.charCodeAt(info.before.length - 1),
+    betweenHead,
+    marker
+  )
+
+  if (open.inside) {
+    between = encodeCharacterReference(betweenHead) + between.slice(1)
+  }
+
+  const betweenTail = between.charCodeAt(between.length - 1)
+  const close = encodeInfo(info.after.charCodeAt(0), betweenTail, marker)
+
+  if (close.inside) {
+    between = between.slice(0, -1) + encodeCharacterReference(betweenTail)
+  }
+
+  const after = tracker.move(marker)
+
+  exit()
+
+  state.attentionEncodeSurroundingInfo = {
+    after: close.outside,
+    before: open.outside
+  }
+  return before + between + after
+}
+
+/**
+ * @param {Emphasis} _
+ * @param {Parents | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+function emphasisPeek(_, _1, state) {
+  return state.options.emphasis || '*'
+}