Give share recipients a bell in the web UI

Calendars reached through a share or a group showed a dash instead of a
reminder toggle, in both the sidebar and the settings table, because the
calendar-wide PUT refused a recipient. They now use the dedicated reminders
endpoint, which stores the recipient's own choice, so the toggle is theirs to
make. The comment claiming member-reached group calendars "can't (no PUT)" was
true and is no longer.

The settings table also had its tooltips and the Notifications column header
wired in German while the sidebar next to it went through t(). Moved to a
translation key, added for all ten languages. The remaining headers in that
table are still hardcoded — untouched here, it is a separate job.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/js/calendar.js

@@ -830,16 +830,18 @@ function renderCalendarList() {
     entries.push({ key: `local:${cal.id}`, source: 'local', dataId: `data-cal-id="${cal.id}"`,
       name: cal.shared_by || cal.name, color: cal.color, enabled: !hiddenLocal.has(cal.id), readOnly,
       sourceLabel: `${t('shared_with_me')} · ${cal.name}${readOnly ? ' · ' + t('perm_read') : ''}`,
+      reminders: true, remindersEnabled: cal.reminders_enabled !== false,
       remove: { icon: EYE_OFF, title: t('hide_cal') } });
   });
   // Group calendars (owned by the creator or reached via membership) — shown so
-  // they can be toggled/recoloured. Owned group calendars can also be muted
+  // they can be toggled, recoloured and muted. Muting is per user: the creator
-  // (reminders), which the server then syncs; member-reached ones can't (no PUT).
+  // owns the calendar, and silencing it for themselves must not silence the
+  // whole group.
   state.localCalendars.filter(c => c.group).forEach(cal => {
     entries.push({ key: `local:${cal.id}`, source: 'local', dataId: `data-cal-id="${cal.id}"`,
       name: cal.name, color: cal.color,
       enabled: cal.owned !== false ? cal.enabled : !hiddenLocal.has(cal.id),
-      reminders: cal.owned !== false, remindersEnabled: cal.reminders_enabled !== false,
+      reminders: true, remindersEnabled: cal.reminders_enabled !== false,
       sourceLabel: `${t('groups_title')} · ${cal.shared_by || ''}`,
       isGroupCal: true, groupIcon: groupIconForLocalCal(cal.id), remove: null });
   });
@@ -984,7 +986,11 @@ function renderCalendarList() {
       }
       if (!cal) return;
       const newVal = cal.reminders_enabled === false; // toggle
-      const path = source === 'ical'
+      // local has a dedicated endpoint so share recipients can mute for
+      // themselves; the others still take the calendar-wide PUT.
+      const path = source === 'local'
+        ? `/local/calendars/${id}/reminders`
+        : source === 'ical'
         ? `/ical/subscriptions/${id}`
         : `/${source}/calendars/${id}`;
       try {
@@ -4432,7 +4438,7 @@ function renderCalendarTable() {
   const hid  = (src, id, isVisible) =>
     `<button class="icon-btn mini-btn ct-eye" data-ct-hid="${src}" data-ct-id="${id}" data-ct-visible="${isVisible ? '1' : '0'}" title="${isVisible ? 'Ausblenden' : 'Anzeigen'}">${isVisible ? EYE_ON : EYE_OFF}</button>`;
   const rem  = (src, id, on) =>
-    `<button class="icon-btn mini-btn ct-bell" data-ct-rem="${src}" data-ct-id="${id}" data-ct-on="${on ? '1' : '0'}" title="${on ? 'Benachrichtigungen aus' : 'Benachrichtigungen an'}">${on ? BELL_ON : BELL_OFF}</button>`;
+    `<button class="icon-btn mini-btn ct-bell" data-ct-rem="${src}" data-ct-id="${id}" data-ct-on="${on ? '1' : '0'}" title="${on ? t('calendar_reminders_on') : t('calendar_reminders_off')}">${on ? BELL_ON : BELL_OFF}</button>`;
   const dot  = (color, fb) =>
     `<span class="ct-dot" style="background:${color || fb}"></span>`;
 
@@ -4565,7 +4571,8 @@ function renderCalendarTable() {
       rows += `<tr>
         <td>${dot(cal.color, '#34a853')}${escHtml(cal.shared_by || cal.name)}</td>
         <td class="ct-src">${escHtml(cal.name)} <span class="cal-badge">${readOnly ? t('perm_read') : t('perm_read_write')}</span></td>
-        <td>${hid('shared', cal.id, !sharedHidden.has(cal.id))}</td><td>—</td><td>—</td><td>—</td><td>—</td>
+        <td>${hid('shared', cal.id, !sharedHidden.has(cal.id))}</td>
+        <td>${rem('local', cal.id, cal.reminders_enabled !== false)}</td><td>—</td><td>—</td><td>—</td>
       </tr>`;
       rowCount++;
     }
@@ -4577,7 +4584,7 @@ function renderCalendarTable() {
 
   container.innerHTML = `<table class="cal-manage-table">
     <thead><tr>
-      <th>Name</th><th>Herkunft</th><th>Sichtbar</th><th>Benachrichtigungen</th><th>Export / Import</th><th>Sync</th><th></th>
+      <th>Name</th><th>Herkunft</th><th>Sichtbar</th><th>${t('calendar_reminders_col')}</th><th>Export / Import</th><th>Sync</th><th></th>
     </tr></thead>
     <tbody>${rows}</tbody>
   </table>`;
@@ -4622,7 +4629,9 @@ function renderCalendarTable() {
     btn.addEventListener('click', async () => {
       const src = btn.dataset.ctRem, id = parseInt(btn.dataset.ctId);
       const enabled = btn.dataset.ctOn !== '1'; // currently on → turn off, currently off → turn on
-      const path = src === 'ical' ? `/ical/subscriptions/${id}` : `/${src === 'ha' ? 'homeassistant' : src}/calendars/${id}`;
+      const path = src === 'local' ? `/local/calendars/${id}/reminders`
+                 : src === 'ical' ? `/ical/subscriptions/${id}`
+                 : `/${src === 'ha' ? 'homeassistant' : src}/calendars/${id}`;
       try {
         await api.put(path, { reminders_enabled: enabled });
         if (src === 'local')       { const c = state.localCalendars.find(c => c.id === id); if (c) c.reminders_enabled = enabled; }

frontend/js/i18n.js

@@ -202,6 +202,7 @@ const translations = {
     reminders_calendar_off: 'Für diesen Kalender sind Benachrichtigungen deaktiviert – Erinnerungen werden nicht ausgeführt.',
     calendar_reminders_on: 'Benachrichtigungen aktiviert',
     calendar_reminders_off: 'Benachrichtigungen deaktiviert',
+    calendar_reminders_col: 'Benachrichtigungen',
     copy: 'Kopieren',
     caldav_publish: 'CalDAV veröffentlichen',
     caldav_unpublish: 'CalDAV deaktivieren',
@@ -596,6 +597,7 @@ const translations = {
     reminders_calendar_off: 'Für dä Kalender sind Benachrichtigunge deaktiviert – Erinnerige werded nöd usgfüert.',
     calendar_reminders_on: 'Benachrichtigunge aktiviert',
     calendar_reminders_off: 'Benachrichtigunge deaktiviert',
+    calendar_reminders_col: 'Benachrichtigunge',
     copy: 'Kopierä',
     caldav_publish: 'CalDAV veröffentlichä',
     caldav_unpublish: 'CalDAV deaktivierä',
@@ -1028,6 +1030,7 @@ const translations = {
     reminders_calendar_off: 'Reminders are disabled for this calendar – they will not fire.',
     calendar_reminders_on: 'Reminders enabled',
     calendar_reminders_off: 'Reminders disabled',
+    calendar_reminders_col: 'Notifications',
     copy: 'Copy',
     caldav_publish: 'Publish via CalDAV',
     caldav_unpublish: 'Unpublish CalDAV',
@@ -1422,6 +1425,7 @@ const translations = {
     reminders_calendar_off: 'Les rappels sont désactivés pour cet agenda – ils ne se déclencheront pas.',
     calendar_reminders_on: 'Rappels activés',
     calendar_reminders_off: 'Rappels désactivés',
+    calendar_reminders_col: 'Notifications',
     copy: 'Copier',
     caldav_publish: 'Publier via CalDAV',
     caldav_unpublish: 'Dépublier CalDAV',
@@ -1816,6 +1820,7 @@ const translations = {
     reminders_calendar_off: 'I promemoria sono disattivati per questo calendario – non verranno attivati.',
     calendar_reminders_on: 'Promemoria attivati',
     calendar_reminders_off: 'Promemoria disattivati',
+    calendar_reminders_col: 'Notifiche',
     copy: 'Copia',
     caldav_publish: 'Pubblica via CalDAV',
     caldav_unpublish: 'Annulla pubblicazione CalDAV',
@@ -2210,6 +2215,7 @@ const translations = {
     reminders_calendar_off: 'Herinneringen zijn uitgeschakeld voor deze agenda – ze worden niet geactiveerd.',
     calendar_reminders_on: 'Herinneringen ingeschakeld',
     calendar_reminders_off: 'Herinneringen uitgeschakeld',
+    calendar_reminders_col: 'Meldingen',
     copy: 'Kopiëren',
     caldav_publish: 'Publiceren via CalDAV',
     caldav_unpublish: 'CalDAV-publicatie stoppen',
@@ -2604,6 +2610,7 @@ const translations = {
     reminders_calendar_off: 'Påmindelser er slået fra for denne kalender – de bliver ikke udløst.',
     calendar_reminders_on: 'Påmindelser slået til',
     calendar_reminders_off: 'Påmindelser slået fra',
+    calendar_reminders_col: 'Notifikationer',
     copy: 'Kopiér',
     caldav_publish: 'Udgiv via CalDAV',
     caldav_unpublish: 'Stop CalDAV-udgivelse',
@@ -2998,6 +3005,7 @@ const translations = {
     reminders_calendar_off: 'Påminnelser er slått av for denne kalenderen – de blir ikke utløst.',
     calendar_reminders_on: 'Påminnelser slått på',
     calendar_reminders_off: 'Påminnelser slått av',
+    calendar_reminders_col: 'Varsler',
     copy: 'Kopier',
     caldav_publish: 'Publiser via CalDAV',
     caldav_unpublish: 'Stopp CalDAV-publisering',
@@ -3392,6 +3400,7 @@ const translations = {
     reminders_calendar_off: 'Påminnelser är avstängda för den här kalendern – de kommer inte att utlösas.',
     calendar_reminders_on: 'Påminnelser aktiverade',
     calendar_reminders_off: 'Påminnelser avstängda',
+    calendar_reminders_col: 'Aviseringar',
     copy: 'Kopiera',
     caldav_publish: 'Publicera via CalDAV',
     caldav_unpublish: 'Sluta publicera via CalDAV',
@@ -3786,6 +3795,7 @@ const translations = {
     reminders_calendar_off: 'Muistutukset on poistettu käytöstä tässä kalenterissa – niitä ei laukaista.',
     calendar_reminders_on: 'Muistutukset käytössä',
     calendar_reminders_off: 'Muistutukset pois käytöstä',
+    calendar_reminders_col: 'Ilmoitukset',
     copy: 'Kopioi',
     caldav_publish: 'Julkaise CalDAV:n kautta',
     caldav_unpublish: 'Lopeta CalDAV-julkaisu',