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/prismjs/plugins/match-braces/prism-match-braces.css

@@ -0,0 +1,29 @@
+.token.punctuation.brace-hover,
+.token.punctuation.brace-selected {
+	outline: solid 1px;
+}
+
+.rainbow-braces .token.punctuation.brace-level-1,
+.rainbow-braces .token.punctuation.brace-level-5,
+.rainbow-braces .token.punctuation.brace-level-9 {
+	color: #E50;
+	opacity: 1;
+}
+.rainbow-braces .token.punctuation.brace-level-2,
+.rainbow-braces .token.punctuation.brace-level-6,
+.rainbow-braces .token.punctuation.brace-level-10 {
+	color: #0B3;
+	opacity: 1;
+}
+.rainbow-braces .token.punctuation.brace-level-3,
+.rainbow-braces .token.punctuation.brace-level-7,
+.rainbow-braces .token.punctuation.brace-level-11 {
+	color: #26F;
+	opacity: 1;
+}
+.rainbow-braces .token.punctuation.brace-level-4,
+.rainbow-braces .token.punctuation.brace-level-8,
+.rainbow-braces .token.punctuation.brace-level-12 {
+	color: #E0E;
+	opacity: 1;
+}