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/components/ConfirmModal.tsx

@@ -2,7 +2,7 @@
 // ConfirmModal Component - Simple confirmation dialog
 // =============================================================================
 
-import type { ReactNode } from "react";
+import { type ReactNode, useEffect } from "react";
 
 export interface ConfirmModalProps {
 	title: string;
@@ -27,6 +27,17 @@ export function ConfirmModal({
 	confirmVariant = "primary",
 	overlayClassName,
 }: ConfirmModalProps) {
+	// Close on Escape key
+	useEffect(() => {
+		function handleKeyDown(e: KeyboardEvent) {
+			if (e.key === "Escape") {
+				onCancel();
+			}
+		}
+		document.addEventListener("keydown", handleKeyDown);
+		return () => document.removeEventListener("keydown", handleKeyDown);
+	}, [onCancel]);
+
 	return (
 		<div className={`modal-overlay${overlayClassName ? ` ${overlayClassName}` : ""}`} onClick={onCancel}>
 			<div className="modal-content" onClick={(e) => e.stopPropagation()} style={{ maxWidth: "450px" }}>