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/@oslojs/encoding/dist/hex.js

@@ -0,0 +1,59 @@
+export function encodeHexUpperCase(data) {
+    let result = "";
+    for (let i = 0; i < data.length; i++) {
+        result += alphabetUpperCase[data[i] >> 4];
+        result += alphabetUpperCase[data[i] & 0x0f];
+    }
+    return result;
+}
+export function encodeHexLowerCase(data) {
+    let result = "";
+    for (let i = 0; i < data.length; i++) {
+        result += alphabetLowerCase[data[i] >> 4];
+        result += alphabetLowerCase[data[i] & 0x0f];
+    }
+    return result;
+}
+export function decodeHex(data) {
+    if (data.length % 2 !== 0) {
+        throw new Error("Invalid hex string");
+    }
+    const result = new Uint8Array(data.length / 2);
+    for (let i = 0; i < data.length; i += 2) {
+        if (!(data[i] in decodeMap)) {
+            throw new Error("Invalid character");
+        }
+        if (!(data[i + 1] in decodeMap)) {
+            throw new Error("Invalid character");
+        }
+        result[i / 2] |= decodeMap[data[i]] << 4;
+        result[i / 2] |= decodeMap[data[i + 1]];
+    }
+    return result;
+}
+const alphabetUpperCase = "0123456789ABCDEF";
+const alphabetLowerCase = "0123456789abcdef";
+const decodeMap = {
+    "0": 0,
+    "1": 1,
+    "2": 2,
+    "3": 3,
+    "4": 4,
+    "5": 5,
+    "6": 6,
+    "7": 7,
+    "8": 8,
+    "9": 9,
+    a: 10,
+    A: 10,
+    b: 11,
+    B: 11,
+    c: 12,
+    C: 12,
+    d: 13,
+    D: 13,
+    e: 14,
+    E: 14,
+    f: 15,
+    F: 15
+};