feat: streamline dashboard UI and improve refill reminder (#86)

- Hide Reorder Reminder card when reminders are enabled (avoids redundancy with Reminder Bar)
- Show all low stock medications in Reminder Bar instead of just the next one
- Rename 'Reorder' to 'Refill' throughout the app
- Make medication names clickable in Refill Reminder card (opens detail modal)
- Add daysLeft display for each low stock medication
- Update translations (EN + DE)

frontend/src/test/pages/DashboardPage.test.tsx

@@ -577,15 +577,15 @@ describe("DashboardPage with email notifications", () => {
 		expect(statusBar).toBeInTheDocument();
 	});
 
-	it("shows reminder email button when there are low stock meds", () => {
+	it("hides reorder reminder card when reminders are enabled (to avoid redundancy)", () => {
 		render(
 			<MemoryRouter>
 				<DashboardPage />
 			</MemoryRouter>
 		);
 
-		// Should show send reminder button
-		expect(screen.getByText(/dashboard\.reorder\.sendReminder/i)).toBeInTheDocument();
+		// Reorder card should NOT be shown when reminders are active (Reminder Bar shows the info instead)
+		expect(screen.queryByText(/dashboard\.reorder\.sendReminder/i)).not.toBeInTheDocument();
 	});
 });