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/@shikijs/langs/dist/markdown-nix.mjs

@@ -0,0 +1,5 @@
+const lang = Object.freeze(JSON.parse("{\"fileTypes\":[],\"injectTo\":[\"text.html.markdown\"],\"injectionSelector\":\"L:text.html.markdown\",\"name\":\"markdown-nix\",\"patterns\":[{\"include\":\"#nix-code-block\"}],\"repository\":{\"nix-code-block\":{\"begin\":\"(^|\\\\G)(\\\\s*)(`{3,}|~{3,})\\\\s*(?i:(nix)(\\\\s+[^`~]*)?$)\",\"beginCaptures\":{\"3\":{\"name\":\"punctuation.definition.markdown\"},\"5\":{\"name\":\"fenced_code.block.language\"},\"6\":{\"name\":\"fenced_code.block.language.attributes\"}},\"end\":\"(^|\\\\G)(\\\\2|\\\\s{0,3})(\\\\3)\\\\s*$\",\"endCaptures\":{\"3\":{\"name\":\"punctuation.definition.markdown\"}},\"name\":\"markup.fenced_code.block.markdown\",\"patterns\":[{\"begin\":\"(^|\\\\G)(\\\\s*)(.*)\",\"contentName\":\"meta.embedded.block.nix\",\"patterns\":[{\"include\":\"source.nix\"}],\"while\":\"(^|\\\\G)(?!\\\\s*([`~]{3,})\\\\s*$)\"}]}},\"scopeName\":\"markdown.nix.codeblock\"}"))
+
+export default [
+lang
+]