refactor: workspace restructure — contract package + pure domain ported, tests green

- bun workspaces: contract/ (Schemas = source of truth: config raw↔resolved,
  domain DTOs, HttpApi contract, API errors) + plugin/ + ui/
- pure domain moved src/{engine,art}→plugin/src/{domain,art}, types now
  imported from @rom-manager/contract and @punktfunk/plugin-kit/wire (the
  hand-copied wire.ts dies), loggers injected instead of module-global
- ui.* and devEntry dropped from the config shape (standalone server is
  gone; stale keys tolerated on decode, dropped by the next save)
- all 48 domain tests ported and green BEFORE any Effect wiring

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

plugin/test/titles.test.ts

@@ -0,0 +1,67 @@
+import { describe, expect, test } from "bun:test";
+import {
+	dedupeKey,
+	parseTitle,
+	pickBestRelease,
+} from "../src/domain/titles.js";
+
+describe("parseTitle", () => {
+	test("strips No-Intro tags and keeps region + revision metadata", () => {
+		const p = parseTitle("Chrono Trigger (USA) (Rev 1) [!]");
+		expect(p.displayTitle).toBe("Chrono Trigger");
+		expect(p.noIntroName).toBe("Chrono Trigger (USA) (Rev 1) [!]");
+		expect(p.region).toBe("USA");
+		expect(p.revision).toBe("Rev 1");
+	});
+
+	test("normalises a trailing article", () => {
+		expect(parseTitle("Legend of Zelda, The (USA)").displayTitle).toBe(
+			"The Legend of Zelda",
+		);
+	});
+
+	test("recognises multi-region tags", () => {
+		const p = parseTitle("Sonic (USA, Europe)");
+		expect(p.regions).toEqual(["USA", "Europe"]);
+		expect(p.region).toBe("USA");
+	});
+
+	test("converts underscores and collapses whitespace", () => {
+		expect(parseTitle("Super_Mario__World").displayTitle).toBe(
+			"Super Mario World",
+		);
+	});
+
+	test("a tagless name is its own title", () => {
+		const p = parseTitle("Tetris");
+		expect(p.displayTitle).toBe("Tetris");
+		expect(p.region).toBeUndefined();
+	});
+});
+
+describe("region dedupe", () => {
+	test("groups by base title", () => {
+		expect(dedupeKey(parseTitle("Sonic (USA)"))).toBe(
+			dedupeKey(parseTitle("Sonic (Europe)")),
+		);
+	});
+
+	test("pickBestRelease honors region priority, then shortest name", () => {
+		const items = [
+			{ parsed: parseTitle("Sonic (Europe)") },
+			{ parsed: parseTitle("Sonic (USA)") },
+			{ parsed: parseTitle("Sonic (Japan)") },
+		];
+		const best = pickBestRelease(items, ["USA", "World", "Europe", "Japan"]);
+		expect(best.parsed.region).toBe("USA");
+	});
+
+	test("falls back to shortest name when no region matches priority", () => {
+		const items = [
+			{ parsed: parseTitle("Game (Korea) (Beta)") },
+			{ parsed: parseTitle("Game (Korea)") },
+		];
+		const best = pickBestRelease(items, ["USA"]);
+		expect(best.parsed.noIntroName).toBe("Game (Korea)");
+	});
+});