feat: add native Windows broadcaster and live score modules

- streamer/windows: vash-broadcast.exe (setup/login/start/stop/status/doctor)
  with per-instance OBS, tosu and FFmpeg, a supervised worker, OCR room
  selection and OBS scene reconciliation; built and tested on Linux only
- streamer/relay.ts shared with Vash TV; Cloudflare Access proxy for dev/staging
- worker status validation and live score helpers for the site
- STREAMING_HANDOFF.md and streamer/ALPHA_TEST.md record what is unverified

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

streamer/tourney.ts

@@ -12,7 +12,7 @@ interface Word {
 	h: number;
 }
 
-const plain = (value: string) =>
+export const plain = (value: string) =>
 	value
 		.normalize('NFKD')
 		.toLowerCase()
@@ -49,15 +49,19 @@ export function findRoom(tsv: string, roomName: string): { x: number; y: number
 	return null;
 }
 
-function tournamentConfig(existing: string, teamSize: number, height: number) {
+/** tournament.cfg with our keys replaced and anything else osu! wrote kept. */
+export function tournamentConfig(
+	existing: string,
+	options: { teamSize: number; height: number; acronym?: string }
+) {
 	const lines = existing
 		.split(/\r?\n/)
 		.filter((line) => !/^\s*(TeamSize|acronym|Height)\s*=/i.test(line));
 	return [
 		...lines.filter(Boolean),
-		`TeamSize = ${teamSize}`,
-		'acronym = VASH',
-		`Height = ${height}`,
+		`TeamSize = ${options.teamSize}`,
+		`acronym = ${options.acronym ?? 'VASH'}`,
+		`Height = ${options.height}`,
 		''
 	].join('\n');
 }
@@ -93,7 +97,7 @@ export class Tourney {
 		}
 		const configPath = join(this.directory, 'tournament.cfg');
 		const existing = await readFile(configPath, 'utf8').catch(() => '');
-		await writeFile(configPath, tournamentConfig(existing, teamSize, this.height));
+		await writeFile(configPath, tournamentConfig(existing, { teamSize, height: this.height }));
 		this.process = Bun.spawn(['wine', this.exe], {
 			cwd: this.directory,
 			env: { ...process.env, DISPLAY: this.display },