perf: self-host fonts, drop unused generated code and add swf tests

- Self-host Nunito and Pixelify Sans via next/font instead of Google Fonts CDN
  (removes render-blocking external stylesheets and preconnects)
- Remove stale mariadb entry from serverExternalPackages (app uses mysql2)
- Exclude unused src/generated Prisma client from typecheck and remove it
- Add unit tests for swf-parser, effectmap and figuremap (0% coverage -> 90%+)

src/lib/services/figuremap.test.ts

@@ -0,0 +1,62 @@
+import { promises as fs } from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import type { FigureLibrary } from "./figuremap";
+import {
+	__setFigureMapPathForTests,
+	listFigureLibraries,
+	mergeLibrary,
+} from "./figuremap";
+
+vi.mock("@/lib/services/site-settings", () => ({
+	siteSettings: { get: vi.fn(async () => "") },
+}));
+
+let dir: string;
+let file: string;
+
+const LIB: FigureLibrary = {
+	id: "h_human",
+	revision: 1,
+	parts: [{ id: 1, type: "hd" }],
+};
+
+beforeEach(async () => {
+	dir = await fs.mkdtemp(path.join(os.tmpdir(), "figuremap-"));
+	file = path.join(dir, "FigureMap.json");
+	await fs.writeFile(file, JSON.stringify({ libraries: [LIB] }));
+	__setFigureMapPathForTests(file);
+});
+
+afterEach(async () => {
+	__setFigureMapPathForTests(null);
+	await fs.rm(dir, { recursive: true, force: true });
+});
+
+describe("lib/services/figuremap", () => {
+	it("lists figure libraries from the map", async () => {
+		const libraries = await listFigureLibraries();
+		expect(libraries).toEqual([LIB]);
+	});
+
+	it("returns an empty list when the file has no libraries array", async () => {
+		await fs.writeFile(file, JSON.stringify({}));
+		expect(await listFigureLibraries()).toEqual([]);
+	});
+
+	it("adds a new library via mergeLibrary", async () => {
+		const added: FigureLibrary = { id: "hh_human", revision: 2 };
+		await mergeLibrary(added);
+		const libraries = await listFigureLibraries();
+		expect(libraries).toHaveLength(2);
+		expect(libraries).toContainEqual(added);
+	});
+
+	it("updates an existing library in place via mergeLibrary", async () => {
+		await mergeLibrary({ ...LIB, revision: 9 });
+		const libraries = await listFigureLibraries();
+		expect(libraries).toHaveLength(1);
+		expect(libraries[0].revision).toBe(9);
+	});
+});