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/astro/tsconfigs/strictest.json

@@ -0,0 +1,24 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./strict.json",
+  "compilerOptions": {
+    // Report errors for fallthrough cases in switch statements
+    "noFallthroughCasesInSwitch": true,
+    // Force functions designed to override their parent class to be specified as `override`.
+    "noImplicitOverride": true,
+    // Force functions to specify that they can return `undefined` if a possible code path does not return a value.
+    "noImplicitReturns": true,
+    // Report an error when a variable is declared but never used.
+    "noUnusedLocals": true,
+    // Report an error when a parameter is declared but never used.
+    "noUnusedParameters": true,
+    // Force the usage of the indexed syntax to access fields declared using an index signature.
+    "noUncheckedIndexedAccess": true,
+    // Report an error when the value `undefined` is given to an optional property that doesn't specify `undefined` as a valid value.
+    "exactOptionalPropertyTypes": true,
+    // Report an error for unreachable code instead of just a warning.
+    "allowUnreachableCode": false,
+    // Report an error for unused labels instead of just a warning.
+    "allowUnusedLabels": false
+  }
+}