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, 45 insertions, 0 deletions

diff --git a/src/lib/server/services/validation.ts b/src/lib/server/services/validation.ts
new file mode 100644
index 0000000..a8cebd9
--- /dev/null
+++ b/src/lib/server/services/validation.ts
@@ -0,0 +1,45 @@
+import * as v from 'valibot';
+
+export const IdSchema = v.pipe(v.number(), v.integer(), v.minValue(1));
+
+export const AddGrocerySchema = v.object({
+	name: v.pipe(v.string(), v.minLength(1)),
+	categoryId: v.nullable(v.pipe(v.number(), v.integer(), v.minValue(1))),
+});
+
+export const AddReferenceSchema = v.object({
+	reference: v.pipe(v.string(), v.minLength(1)),
+	price: v.nullable(v.pipe(v.number(), v.minValue(0))),
+	unit: v.nullable(v.string()),
+	qualityScore: v.nullable(
+		v.pipe(v.number(), v.integer(), v.minValue(0), v.maxValue(100)),
+	),
+});
+
+export function numericId(
+	value: FormDataEntryValue | null | undefined,
+): number {
+	const str = value?.toString().trim() ?? '';
+	const n = Number(str);
+	if (!Number.isFinite(n) || n <= 0 || !Number.isInteger(n)) {
+		throw new Error('Invalid id');
+	}
+	return n;
+}
+
+export function parseFormString(
+	value: FormDataEntryValue | null | undefined,
+): string | null {
+	const str = value?.toString().trim() ?? '';
+	return str || null;
+}
+
+export function parseOptionalNumber(
+	value: FormDataEntryValue | null | undefined,
+): number | null {
+	const str = value?.toString().trim() ?? '';
+	if (!str) return null;
+	const n = Number(str);
+	if (!Number.isFinite(n)) return null;
+	return n;
+}