feat: Add edit functionality for team members

- Edit modal with Bootstrap for inline editing
- Update name, email, role, responsibilities, telegram_id
- Form validation and error handling
- Success/error flash messages
- Team member data passed to frontend via JSON

app.py

@@ -2837,6 +2837,45 @@ def team_deactivate(member_id):
     return jsonify({'success': True})
 
 
+@app.route('/team/edit', methods=['POST'])
+def team_edit():
+    """Bearbeitet ein Team-Mitglied."""
+    member_id = request.form.get('member_id')
+    name = request.form.get('name', '').strip()
+    email = request.form.get('email', '').strip()
+    role = request.form.get('role', '').strip()
+    responsibilities = request.form.get('responsibilities', '').strip()
+    telegram_chat_id = request.form.get('telegram_chat_id', '').strip()
+    
+    if not member_id or not name or not email or not role or not responsibilities:
+        flash('Alle Felder außer Telegram Chat ID sind Pflichtfelder!', 'danger')
+        return redirect(url_for('team'))
+    
+    # Optional: Telegram Chat ID als Integer
+    chat_id = None
+    if telegram_chat_id:
+        try:
+            chat_id = int(telegram_chat_id)
+        except ValueError:
+            flash('Telegram Chat ID muss eine Zahl sein!', 'warning')
+            chat_id = None
+    
+    # Update in Datenbank
+    con = sqlite3.connect(EMAIL_JOURNAL_DB)
+    con.execute("""
+        UPDATE team_members 
+        SET name = ?, email = ?, role = ?, responsibilities = ?, telegram_id = ?
+        WHERE id = ?
+    """, (name, email, role, responsibilities, chat_id, member_id))
+    con.commit()
+    con.close()
+    
+    flash(f'✅ Team-Member "{name}" erfolgreich aktualisiert!', 'success')
+    logger.info(f"[Team] Member #{member_id} aktualisiert: {name} ({email})")
+    
+    return redirect(url_for('team'))
+
+
 @app.route('/api/telegram-qr')
 def telegram_qr():
     """Generiert QR-Code für Telegram Bot."""