Fix: time->time_from/time_to mapping, auto time_to +2h, captcha session fix

app/main.py

@@ -273,6 +273,20 @@ def reservations():
     # POST: Neue Reservierung
     data = request.get_json()
     
+    # Fix: time -> time_from/time_to Mapping
+    # Frontend sendet 'time', Backend erwartet 'time_from'/'time_to'
+    if 'time' in data and 'time_from' not in data:
+        data['time_from'] = data['time']
+    
+    # time_to automatisch +2h berechnen wenn nicht angegeben
+    if 'time_to' not in data or not data['time_to']:
+        from datetime import datetime as dt
+        try:
+            tf = dt.strptime(data['time_from'], '%H:%M')
+            data['time_to'] = (tf + timedelta(minutes=120)).strftime('%H:%M')
+        except:
+            data['time_to'] = '22:00'  # Default
+    
     # Gast finden oder erstellen
     guest_id = data.get('guest_id')
     if not guest_id and data.get('email'):
@@ -301,7 +315,7 @@ def reservations():
             data.get('guests'),
             data.get('occasion'),
             data.get('notes'),
-            data.get('source', 'manual'),
+            data.get('source', 'web'),
             data.get('phone_caller_name'),
             data.get('created_by', 'system')
         ))
@@ -975,7 +989,7 @@ def check_reservation_availability():
     data = request.get_json()
     
     date = data.get('date')
-    time_from = data.get('time_from')
+    time_from = data.get('time_from') or data.get('time') + ':00' if data.get('time') else None
     time_to = data.get('time_to', '23:00')
     guests = data.get('guests', 2)
     preferred_room_id = data.get('room_id')