fix: add Linux package homepage metadata

tests/unit/pi-runtime-bundle.test.ts

@@ -92,6 +92,7 @@ describe('Pi runtime production bundler', () => {
 
   it('wires every package target to its matching staged Pi runtime', async () => {
     const packageJson = JSON.parse(await readFile('package.json', 'utf8')) as {
+      homepage: string;
       scripts: Record<string, string>;
     };
     const builder = YAML.parse(await readFile('electron-builder.yml', 'utf8')) as Record<
@@ -109,6 +110,7 @@ describe('Pi runtime production bundler', () => {
       .toBe('node scripts/smoke-pi-real.mjs');
     expect(packageJson.scripts['perf:pi:release'])
       .toBe('node scripts/run-pi-release-performance.mjs');
+    expect(packageJson.homepage).toBe('https://git.nianxx.cn/wangxuming/makelore');
     expect(builder.mac.extraResources).toContainEqual({
       from: 'build/pi-runtime/darwin-${arch}',
       to: 'pi-runtime',