initial commit

src/lib/keymap.ts

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+export type KeymapEntry = { key: string; href: string; label: string };
+export const GLOBAL_NAV_KEYS: KeymapEntry[] = [
+  { key: 'B', href: 'back', label: 'Back' },
+  { key: 'Q', href: 'disconnect', label: 'Disconnect' },
+  { key: 'I', href: '/bbs/legal-notice', label: 'Legal Notice' },
+];
+export const MENU_KEYS: KeymapEntry[] = [
+  { key: 'P', href: '/bbs/pc/phobia', label: 'PHOB!A' },
+  { key: 'T', href: '/bbs/pc/trancemission', label: 'Tr@nceMISSION' },
+  { key: 'S', href: '/bbs/pc/skyline', label: 'SkyLINE Productions' },
+  { key: 'K', href: '/bbs/pc/kosmos-design', label: 'Kosmos Design [KDS]' },
+  { key: 'D', href: '/bbs/atari/tropic-dreams', label: 'Tropic DREAMs' },
+  { key: 'E', href: '/bbs/amiga/esprit', label: 'ESPRIT Releases' },
+  { key: 'M', href: '/bbs/amiga/mods', label: 'MOD Files' },
+  { key: 'A', href: '/bbs/fido/ansi-art', label: 'BBS ANSI Art' },
+  { key: 'F', href: '/bbs/fido/nodelist', label: 'Fidonets and Nodelists' },
+];
+export const ALL_KEYS: KeymapEntry[] = [...GLOBAL_NAV_KEYS, ...MENU_KEYS];
+export function findKeyEntry(pressedKey: string): KeymapEntry | undefined {
+  const upper = pressedKey.toUpperCase();
+  return ALL_KEYS.find((entry) => entry.key === upper);
+}

src/lib/sound.ts

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+export async function playLine1Sequence(onComplete: () => void) {
+  const steps = ['/audio/dial-tone.mp3', '/audio/dtmf-beeps.mp3', '/audio/modem-handshake.mp3'];
+  for (const src of steps) { await playClip(src); }
+  onComplete();
+}
+function playClip(src: string): Promise<void> {
+  return new Promise((resolve) => {
+    const audio = new Audio(src);
+    audio.addEventListener('ended', () => resolve());
+    audio.addEventListener('error', () => resolve());
+    audio.play().catch(() => resolve());
+  });
+}
+const STORAGE_KEY = 'hasConnected';
+export function hasConnectedBefore(): boolean {
+  if (typeof localStorage === 'undefined') return false;
+  return localStorage.getItem(STORAGE_KEY) === 'true';
+}
+export function markConnected() { localStorage.setItem(STORAGE_KEY, 'true'); }
+export function resetConnected() { localStorage.removeItem(STORAGE_KEY); }