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/fast-string-width/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "fast-string-width",
+  "repository": "github:fabiospampinato/fast-string-width",
+  "description": "A fast function for calculating the visual width of a string once printed to the terminal.",
+  "license": "MIT",
+  "version": "1.1.0",
+  "type": "module",
+  "main": "dist/index.js",
+  "exports": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "scripts": {
+    "clean": "tsex clean",
+    "compile": "tsex compile",
+    "compile:watch": "tsex compile --watch",
+    "test": "tsex test",
+    "test:watch": "tsex test --watch",
+    "prepublishOnly": "tsex prepare"
+  },
+  "keywords": [
+    "fast",
+    "string",
+    "width",
+    "cli",
+    "terminal"
+  ],
+  "dependencies": {
+    "fast-string-truncated-width": "^1.2.0"
+  },
+  "devDependencies": {
+    "fava": "^0.3.4",
+    "tsex": "^4.0.2",
+    "typescript": "^5.7.3"
+  }
+}