feat(outlook-addin): remove add-in files and update server to prevent serving static files

feat(i18n): add translations for "Add to Outlook" and "Add to Google Calendar"
feat(calendar): implement functionality to generate Outlook and Google Calendar event links

src/i18n/de.json

@@ -445,6 +445,8 @@
     "sat": "Sa",
     "sun": "So",
     "downloadICS": "ICS herunterladen",
+    "addToOutlook": "Zu Outlook hinzufügen",
+    "addToGoogleCalendar": "Zu Google Kalender",
     "icsDownloaded": "ICS-Datei heruntergeladen",
     "icsFailed": "ICS-Datei konnte nicht heruntergeladen werden",
     "share": "Teilen",

src/i18n/en.json

@@ -445,6 +445,8 @@
     "sat": "Sat",
     "sun": "Sun",
     "downloadICS": "Download ICS",
+    "addToOutlook": "Add to Outlook",
+    "addToGoogleCalendar": "Google Calendar",
     "icsDownloaded": "ICS file downloaded",
     "icsFailed": "Could not download ICS file",
     "share": "Share",

src/pages/Calendar.jsx

@@ -1,7 +1,7 @@
 import { useState, useEffect, useMemo } from 'react';
 import {
   ChevronLeft, ChevronRight, Plus, Calendar as CalendarIcon, Clock, Video,
-  Loader2, Download, Share2, Globe, Trash2, Edit, X, UserPlus, Send,
+  Loader2, Download, Share2, Globe, Trash2, Edit, X, UserPlus, Send, ExternalLink,
 } from 'lucide-react';
 import api from '../services/api';
 import { useAuth } from '../contexts/AuthContext';
@@ -229,6 +229,41 @@ export default function Calendar() {
     }
   };
 
+  const buildOutlookUrl = (ev) => {
+    const start = new Date(ev.start_time);
+    const end = new Date(ev.end_time);
+    const fmt = (d) => d.toISOString().replace(/[-:]/g, '').replace(/\.\d{3}/, '');
+    const baseUrl = window.location.origin;
+    const location = ev.room_uid ? `${baseUrl}/join/${ev.room_uid}` : '';
+    const body = [ev.description || '', location ? `\n\nMeeting: ${location}` : ''].join('');
+    const params = new URLSearchParams({
+      rru: 'addevent',
+      subject: ev.title,
+      startdt: start.toISOString(),
+      enddt: end.toISOString(),
+      body: body.trim(),
+      location,
+      allday: 'false',
+      path: '/calendar/action/compose',
+    });
+    return `https://outlook.live.com/calendar/0/action/compose?${params.toString()}`;
+  };
+
+  const buildGoogleCalUrl = (ev) => {
+    const fmt = (d) => new Date(d).toISOString().replace(/[-:]/g, '').replace(/\.\d{3}/, '');
+    const baseUrl = window.location.origin;
+    const location = ev.room_uid ? `${baseUrl}/join/${ev.room_uid}` : '';
+    const details = [ev.description || '', location ? `\nMeeting: ${location}` : ''].join('');
+    const params = new URLSearchParams({
+      action: 'TEMPLATE',
+      text: ev.title,
+      dates: `${fmt(ev.start_time)}/${fmt(ev.end_time)}`,
+      details: details.trim(),
+      location,
+    });
+    return `https://calendar.google.com/calendar/render?${params.toString()}`;
+  };
+
   // Share functions
   const openShareModal = async (ev) => {
     setShowShare(ev);
@@ -601,6 +636,24 @@ export default function Calendar() {
 
             {/* Actions */}
             <div className="flex flex-wrap items-center gap-2 pt-4 border-t border-th-border">
+              <a
+                href={buildOutlookUrl(showDetail)}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="btn-ghost text-xs py-1.5 px-3 inline-flex items-center gap-1.5 no-underline"
+              >
+                <ExternalLink size={14} />
+                {t('calendar.addToOutlook')}
+              </a>
+              <a
+                href={buildGoogleCalUrl(showDetail)}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="btn-ghost text-xs py-1.5 px-3 inline-flex items-center gap-1.5 no-underline"
+              >
+                <ExternalLink size={14} />
+                {t('calendar.addToGoogleCalendar')}
+              </a>
               <button onClick={() => handleDownloadICS(showDetail)} className="btn-ghost text-xs py-1.5 px-3">
                 <Download size={14} />
                 {t('calendar.downloadICS')}