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

frontend/src/types/index.ts

@@ -47,6 +47,7 @@ export type Medication = {
 	lastStockCorrectionAt?: string | null;
 	pillWeightMg?: number | null;
 	doseUnit?: DoseUnit | null; // Unit for the dose (mg, g, mcg, ml, IU, etc.)
+	medicationStartDate?: string | null;
 	blisters: Blister[]; // Legacy array format
 	intakes?: Intake[]; // New intake format with per-intake takenBy
 	imageUrl?: string | null;
@@ -58,6 +59,8 @@ export type Medication = {
 	prescriptionLowRefillThreshold?: number;
 	prescriptionExpiryDate?: string | null;
 	intakeRemindersEnabled?: boolean; // Medication-level setting (deprecated, use per-intake)
+	isObsolete?: boolean;
+	obsoleteAt?: string | null;
 	dismissedUntil?: string | null; // ISO date string (YYYY-MM-DD) - all past doses until this date are dismissed
 	updatedAt: string | number | null;
 };
@@ -114,6 +117,7 @@ export type FormState = {
 	looseTablets: string; // For blister: extra loose pills; for bottle: current stock
 	pillWeightMg: string;
 	doseUnit: DoseUnit; // Unit for the dose (mg, g, mcg, ml, IU, etc.)
+	medicationStartDate: string;
 	expiryDate: string;
 	notes: string;
 	prescriptionEnabled: boolean;