fix: improve modal behavior on web and Android scrolling

- Restructure ModalBase to use absolute-positioned backdrop behind card
  content, fixing modal stacking issues on web (React Native Web portals)
- Hide EventOverlay when DeleteEventModal is open to prevent z-index
  conflicts on web
- Add nestedScrollEnabled to CardBase ScrollView for Android
- Use TouchableOpacity with delayPressIn in EventCard for scroll-friendly
  touch handling
- Keep eventToDelete state stable during modal fade-out to prevent
  content flash between recurring/single variants
- Fix German umlauts in DeleteEventModal

CLAUDE.md

@@ -200,6 +200,11 @@ Reusable base components for cards and modals with consistent styling.
 
 ModalBase provides: transparent Modal + backdrop (click-outside-to-close) + Android back button support.
 
+**ModalBase Architecture Note:** Uses absolute-positioned backdrop behind the card content (not nested Pressables). This approach:
+- Fixes modal stacking issues on web (React Native Web renders modals as DOM portals)
+- Allows proper scrolling on Android (no touch event conflicts)
+- Card naturally blocks touches from reaching backdrop due to z-order
+
 **Component Hierarchy:**
 ```
 CardBase
@@ -502,6 +507,7 @@ NODE_ENV=development        # development = pretty logs, production = JSON
   - Supports events from adjacent months visible in grid
   - Uses `useFocusEffect` for automatic reload on tab focus
   - DeleteEventModal integration for recurring event deletion with three modes
+  - EventOverlay hides when DeleteEventModal is open (fixes modal stacking on web)
 - Chat screen fully functional with FlashList, message sending, and event confirm/reject
   - **Multiple event proposals**: AI can propose multiple events in one response
   - Arrow navigation between proposals with "Event X von Y" counter
@@ -515,10 +521,10 @@ NODE_ENV=development        # development = pretty logs, production = JSON
   - keyboardDismissMode="interactive" and keyboardShouldPersistTaps="handled"
 - `EventService`: getAll(), getById(), getByDateRange(), create(), update(), delete(mode, occurrenceDate) - fully implemented with recurring delete modes
 - `ChatService`: sendMessage(), confirmEvent(deleteMode, occurrenceDate), rejectEvent(), getConversations(), getConversation() - fully implemented with cursor pagination and recurring delete support
-- `CardBase`: Reusable card component with header (title/subtitle), content area, and optional footer button - configurable padding, border, text size via props
+- `CardBase`: Reusable card component with header (title/subtitle), content area, and optional footer button - configurable padding, border, text size via props, ScrollView uses `nestedScrollEnabled` for Android
-- `ModalBase`: Reusable modal wrapper with backdrop, uses CardBase internally - provides click-outside-to-close and Android back button support
+- `ModalBase`: Reusable modal wrapper with backdrop (absolute-positioned behind card), uses CardBase internally - provides click-outside-to-close, Android back button support, and proper scrolling on Android
 - `EventCardBase`: Event card with date/time/recurring icons - uses CardBase for structure
-- `EventCard`: Uses EventCardBase + edit/delete buttons for calendar display
+- `EventCard`: Uses EventCardBase + edit/delete buttons (TouchableOpacity with delayPressIn for scroll-friendly touch handling)
 - `ProposedEventCard`: Uses EventCardBase + confirm/reject buttons for chat proposals (supports create/update/delete actions with deleteMode display)
 - `DeleteEventModal`: Delete confirmation modal using ModalBase - shows three options for recurring events (single/future/all), simple confirm for non-recurring
 - `EventOverlay` (in calendar.tsx): Day events overlay using ModalBase - shows EventCards for selected day

apps/client/src/app/(tabs)/calendar.tsx

@@ -188,14 +188,14 @@ const Calendar = () => {
       }
     } catch (error) {
       console.error("Failed to delete event:", error);
-    } finally {
-      setEventToDelete(null);
     }
+    // Note: Don't clear eventToDelete here - it will be overwritten when opening a new modal.
+    // Clearing it during fade-out animation causes the modal content to flash from recurring to single.
   };
 
   const handleDeleteCancel = () => {
     setDeleteModalVisible(false);
-    setEventToDelete(null);
+    // Note: Don't clear eventToDelete - keeps modal content stable during fade-out animation
   };
 
   // Get events for selected date
@@ -222,7 +222,7 @@ const Calendar = () => {
         onDayPress={handleDayPress}
       />
       <EventOverlay
-        visible={selectedDate !== null}
+        visible={selectedDate !== null && !deleteModalVisible}
         date={selectedDate}
         events={selectedDateEvents}
         onClose={handleCloseOverlay}

apps/client/src/components/CardBase.tsx

@@ -84,7 +84,10 @@ export const CardBase = ({
 
       {/* Content */}
       {scrollable ? (
-        <ScrollView style={{ maxHeight: maxContentHeight }}>
+        <ScrollView
+          style={{ maxHeight: maxContentHeight }}
+          nestedScrollEnabled={true}
+        >
           {contentElement}
         </ScrollView>
       ) : (

apps/client/src/components/DeleteEventModal.tsx

@@ -77,7 +77,7 @@ export const DeleteEventModal = ({
         // Non-recurring event: simple confirmation
         <View>
           <Text className="text-base mb-4" style={{ color: theme.textPrimary }}>
-            Moechtest du diesen Termin wirklich loeschen?
+            Möchtest du diesen Termin wirklich löschen?
           </Text>
           <Pressable
             onPress={() => onConfirm("all")}
@@ -90,7 +90,7 @@ export const DeleteEventModal = ({
               className="font-medium text-base text-center"
               style={{ color: theme.buttonText }}
             >
-              Loeschen
+              Löschen
             </Text>
           </Pressable>
         </View>

apps/client/src/components/EventCard.tsx

@@ -1,4 +1,4 @@
-import { View, Pressable } from "react-native";
+import { View, TouchableOpacity } from "react-native";
 import { ExpandedEvent } from "@calchat/shared";
 import { Feather } from "@expo/vector-icons";
 import { useThemeStore } from "../stores/ThemeStore";
@@ -21,10 +21,12 @@ export const EventCard = ({ event, onEdit, onDelete }: EventCardProps) => {
         description={event.description}
         isRecurring={event.isRecurring}
       >
-        {/* Action buttons */}
+        {/* Action buttons - TouchableOpacity with delayPressIn allows ScrollView to detect scroll gestures */}
         <View className="flex-row justify-end mt-3 gap-3">
-          <Pressable
+          <TouchableOpacity
             onPress={onEdit}
+            delayPressIn={100}
+            activeOpacity={0.7}
             className="w-10 h-10 rounded-full items-center justify-center"
             style={{
               borderWidth: 1,
@@ -32,9 +34,11 @@ export const EventCard = ({ event, onEdit, onDelete }: EventCardProps) => {
             }}
           >
             <Feather name="edit-2" size={18} color={theme.textPrimary} />
-          </Pressable>
+          </TouchableOpacity>
-          <Pressable
+          <TouchableOpacity
             onPress={onDelete}
+            delayPressIn={100}
+            activeOpacity={0.7}
             className="w-10 h-10 rounded-full items-center justify-center"
             style={{
               borderWidth: 1,
@@ -42,7 +46,7 @@ export const EventCard = ({ event, onEdit, onDelete }: EventCardProps) => {
             }}
           >
             <Feather name="trash-2" size={18} color={theme.textPrimary} />
-          </Pressable>
+          </TouchableOpacity>
         </View>
       </EventCardBase>
     </View>

apps/client/src/components/ModalBase.tsx

@@ -1,4 +1,4 @@
-import { Modal, Pressable } from "react-native";
+import { Modal, Pressable, View } from "react-native";
 import { ReactNode } from "react";
 import { useThemeStore } from "../stores/ThemeStore";
 import { CardBase } from "./CardBase";
@@ -36,19 +36,21 @@ export const ModalBase = ({
       animationType="fade"
       onRequestClose={onClose}
     >
+      <View className="flex-1 justify-center items-center">
+        {/* Backdrop - absolute positioned behind the card */}
         <Pressable
-        className="flex-1 justify-center items-center"
+          className="absolute inset-0"
           style={{ backgroundColor: "rgba(0,0,0,0.5)" }}
           onPress={onClose}
-      >
+        />
-        <Pressable
+        {/* Card content - on top, naturally blocks touches to backdrop */}
+        <View
           className="w-11/12 rounded-2xl overflow-hidden"
           style={{
             backgroundColor: theme.primeBg,
             borderWidth: 4,
             borderColor: theme.borderPrimary,
           }}
-          onPress={(e) => e.stopPropagation()}
         >
           <CardBase
             title={title}
@@ -65,8 +67,8 @@ export const ModalBase = ({
           >
             {children}
           </CardBase>
-        </Pressable>
+        </View>
-      </Pressable>
+      </View>
     </Modal>
   );
 };