refactor: services layer, valibot validation, shared CSS utilities, aria labels, and drizzle migrate

- Extract groceries/categories/references services with db injection
- Add valibot for form validation and safe numeric id parsing
- Fix category delete FK behavior with onDelete: set null + migration
- Replace custom migrate.js with drizzle-orm/libsql/migrator
- Add shared CSS utility classes in app.css (forms, lists, buttons)
- Add aria-pressed and aria-label on interactive elements
- Remove redundant app.css imports and unused /stores import
- Add integration tests for all services using drizzle migrate helper
- Remove smoke test; add db:migrate and db:studio scripts

1 files changed, 13 insertions, 0 deletions

diff --git a/src/lib/server/db/test-helper.ts b/src/lib/server/db/test-helper.ts
new file mode 100644
index 0000000..5bae681
--- /dev/null
+++ b/src/lib/server/db/test-helper.ts
@@ -0,0 +1,13 @@
+import { createClient } from '@libsql/client';
+import { drizzle } from 'drizzle-orm/libsql';
+import { migrate } from 'drizzle-orm/libsql/migrator';
+import * as schema from './schema';
+
+export async function createTestDb() {
+	const client = createClient({ url: ':memory:' });
+	const db = drizzle(client, { schema });
+
+	await migrate(db, { migrationsFolder: './drizzle' });
+
+	return { db, client };
+}