feat: add repeat daily reminder functionality with UI updates and translations

frontend/src/App.tsx

@@ -1250,11 +1250,12 @@ export default function App() {
 												{t('settings.stock.repeatDaily')}
 												<span className="info-tooltip small" data-tooltip={t('settings.stock.repeatTooltip')}>ⓘ</span>
 											</label>
-											<label className="toggle-switch small">
+											<label className={`toggle-switch small${!((settings.emailEnabled && settings.emailStockReminders && settings.notificationEmail) || (settings.shoutrrrEnabled && settings.shoutrrrStockReminders && settings.shoutrrrUrl)) ? ' disabled' : ''}`}>
 												<input
 													type="checkbox"
 													checked={settings.repeatDailyReminders}
 													onChange={(e) => setSettings({ ...settings, repeatDailyReminders: e.target.checked })}
+													disabled={!((settings.emailEnabled && settings.emailStockReminders && settings.notificationEmail) || (settings.shoutrrrEnabled && settings.shoutrrrStockReminders && settings.shoutrrrUrl))}
 												/>
 												<span className="toggle-slider"></span>
 											</label>

frontend/src/styles.css

@@ -1605,6 +1605,15 @@ textarea {
   transform: translateX(20px);
 }
 
+.toggle-switch.disabled .toggle-slider {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.toggle-switch.disabled input {
+  cursor: not-allowed;
+}
+
 @media (max-width: 600px) {
   .setting-group { grid-template-columns: 1fr; }
 }