feat(coding): add Main Data Service Host adapter

tests/unit/data-service-server-registration.test.ts

@@ -0,0 +1,18 @@
+import { readFile } from 'node:fs/promises';
+import { resolve } from 'node:path';
+import { describe, expect, it } from 'vitest';
+
+describe('Data Service Host API registration', () => {
+  it('registers before the existing Works catch-all', async () => {
+    const source = await readFile(resolve('electron/api/route-handlers.ts'), 'utf8');
+    expect(source).toMatch(
+      /import\s+\{\s*handleDataServiceRoutes\s*\}\s+from\s+['"]\.\/routes\/data-service['"]/,
+    );
+    const routeList = source.match(/hostApiRouteHandlers[^=]*=\s*\[([\s\S]*?)\];/);
+    expect(routeList?.[1]).toBeDefined();
+    const dataServiceIndex = routeList?.[1].indexOf('handleDataServiceRoutes') ?? -1;
+    const worksIndex = routeList?.[1].indexOf('handleWorksRoutes') ?? -1;
+    expect(dataServiceIndex).toBeGreaterThanOrEqual(0);
+    expect(worksIndex).toBeGreaterThan(dataServiceIndex);
+  });
+});