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/@rollup/rollup-darwin-arm64/README.md

@@ -0,0 +1,3 @@
+# `@rollup/rollup-darwin-arm64`
+
+This is the **aarch64-apple-darwin** binary for `rollup`

network-poc/frontend/node_modules/@rollup/rollup-darwin-arm64/package.json

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+{
+  "name": "@rollup/rollup-darwin-arm64",
+  "version": "4.60.1",
+  "os": [
+    "darwin"
+  ],
+  "cpu": [
+    "arm64"
+  ],
+  "files": [
+    "rollup.darwin-arm64.node"
+  ],
+  "description": "Native bindings for Rollup",
+  "author": "Lukas Taegert-Atkinson",
+  "homepage": "https://rollupjs.org/",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/rollup/rollup.git"
+  },
+  "main": "./rollup.darwin-arm64.node"
+}