feat(api): add activities + work_sessions domain schema and shared contracts

apps/api/test/schema.test.ts

@@ -0,0 +1,60 @@
+import { describe, it, expect } from 'vitest';
+import { eq } from 'drizzle-orm';
+import { db } from '../src/db/client';
+import { activities, workSessions, user } from '../src/db/schema';
+import { createApp } from '../src/app';
+
+const json = { 'content-type': 'application/json' };
+
+describe('domain schema', () => {
+  it('creates and reads back an activity with a json insole_types array', async () => {
+    const [inserted] = await db
+      .insert(activities)
+      .values({ name: 'Frezen', insoleTypes: ['Kurk', 'Berk'] })
+      .returning();
+
+    const [row] = await db.select().from(activities).where(eq(activities.id, inserted.id));
+
+    expect(row.name).toBe('Frezen');
+    expect(row.insoleTypes).toEqual(['Kurk', 'Berk']);
+  });
+
+  it('defaults a work_sessions row to status=active, source=app, pair_count=2, null end_time', async () => {
+    const app = createApp();
+    const creds = {
+      email: 'schema-user@example.com',
+      password: 'sterk-wachtwoord-123',
+      name: 'Schema User',
+    };
+    await app.request('/api/auth/sign-up/email', {
+      method: 'POST',
+      headers: json,
+      body: JSON.stringify(creds),
+    });
+
+    const [createdUser] = await db.select().from(user).where(eq(user.email, creds.email));
+    expect(createdUser).toBeTruthy();
+
+    const [activity] = await db
+      .insert(activities)
+      .values({ name: 'Slijpen', insoleTypes: ['Kurk', 'Berk', '3D'] })
+      .returning();
+
+    const [inserted] = await db
+      .insert(workSessions)
+      .values({
+        userId: createdUser.id,
+        activityId: activity.id,
+        startTime: new Date(),
+      })
+      .returning();
+
+    const [row] = await db.select().from(workSessions).where(eq(workSessions.id, inserted.id));
+
+    expect(row.status).toBe('active');
+    expect(row.source).toBe('app');
+    expect(row.pairCount).toBe(2);
+    expect(row.endTime).toBeNull();
+    expect(row.durationSeconds).toBeNull();
+  });
+});