feat: obsolete medication archiving, start date, and UI improvements (#215)

* feat: obsolete medication archiving, start date, and UI improvements

- Add soft-archive (obsolete) for medications with dedicated section and toggle
- Add medication start date field with date picker and validation
- Add obsolete/reactivate API endpoints with proper auth
- Filter obsolete meds from schedule, coverage, planner, and notifications
- Improve UserFilterModal with intake schedules, stock badges, and click-to-open
- Improve dashboard taken-by badges with per-intake bell icons
- Add Escape key support to ConfirmModal and MobileEditModal
- Fix Lightbox close button positioning near image
- Add read-only mode support for MobileEditModal
- DB migrations: 0008 (is_obsolete, obsolete_at), 0009 (medication_start_date)
- All user-facing text uses i18n keys (en + de)

* test: fix tests for obsolete medications and UI changes

- Backend: add is_obsolete, obsolete_at, medication_start_date columns to test schemas
- Backend: add test medication inserts in planner tests for active-med filtering
- Frontend: update useMedications URL to include includeObsolete param
- Frontend: fix MobileEditModal selectors and validation assertions
- Frontend: add onClearUser prop to UserFilterModal test renders
- Frontend: fix MedicationsPage and DashboardPage test assertions

backend/src/db/schema.ts

@@ -47,6 +47,9 @@ export const medications = sqliteTable("medications", {
 	expiryDate: text("expiry_date"),
 	notes: text("notes"),
 	intakeRemindersEnabled: integer("intake_reminders_enabled", { mode: "boolean" }).notNull().default(false),
+	medicationStartDate: text("medication_start_date").notNull().default(""),
+	isObsolete: integer("is_obsolete", { mode: "boolean" }).notNull().default(false),
+	obsoleteAt: integer("obsolete_at", { mode: "timestamp" }),
 	prescriptionEnabled: integer("prescription_enabled", { mode: "boolean" }).notNull().default(false),
 	prescriptionAuthorizedRefills: integer("prescription_authorized_refills"),
 	prescriptionRemainingRefills: integer("prescription_remaining_refills"),