feat(mobile): IncomingCallModal with Annehmen/Ablehnen + name resolution

apps/mobile/components/IncomingCallModal.tsx

@@ -0,0 +1,109 @@
+import { chat } from '@chat-app/shared';
+import type { ConversationSummary } from '@chat-app/shared/chat';
+import { useEffect, useState } from 'react';
+import { Modal, Pressable, StyleSheet, Text, View } from 'react-native';
+
+import { Avatar } from './Avatar';
+import { useCall } from '../lib/callContext';
+import { supabase } from '../lib/supabase';
+import { colors } from '../theme/colors';
+
+// Full-screen modal that surfaces over any route when the CallContext
+// reports an `incoming` state. Resolves the caller's display name from
+// the conversation membership; falls back to "Anrufer" otherwise.
+export function IncomingCallModal() {
+  const { state, acceptIncoming, rejectIncoming } = useCall();
+  const visible = state.kind === 'incoming';
+
+  const [conversation, setConversation] = useState<ConversationSummary | null>(null);
+
+  useEffect(() => {
+    if (state.kind !== 'incoming') {
+      setConversation(null);
+      return;
+    }
+    let cancelled = false;
+    void (async () => {
+      try {
+        const all = await chat.listConversations(supabase);
+        if (cancelled) return;
+        setConversation(all.find((c) => c.id === state.conversationId) ?? null);
+      } catch {
+        /* swallow */
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [state]);
+
+  if (state.kind !== 'incoming') return null;
+
+  const callerName = (() => {
+    if (!conversation) return 'Anrufer';
+    const m = conversation.members.find((mm) => mm.userId === state.fromUserId);
+    return m?.profile?.displayName ?? m?.profile?.username ?? 'Anrufer';
+  })();
+
+  const conversationTitle =
+    conversation?.type === 'group' ? (conversation.name ?? 'Gruppe') : callerName;
+
+  return (
+    <Modal visible={visible} transparent animationType="fade" onRequestClose={rejectIncoming}>
+      <View style={styles.container}>
+        <Text style={styles.subtitle}>Eingehender Anruf</Text>
+        <Avatar name={callerName} size={96} />
+        <Text style={styles.title}>{callerName}</Text>
+        {conversation?.type === 'group' && (
+          <Text style={styles.subtitle}>in {conversationTitle}</Text>
+        )}
+        <View style={styles.actions}>
+          <Pressable
+            style={[styles.button, styles.buttonReject]}
+            onPress={() => {
+              void rejectIncoming();
+            }}
+          >
+            <Text style={styles.buttonText}>Ablehnen</Text>
+          </Pressable>
+          <Pressable
+            style={[styles.button, styles.buttonAccept]}
+            onPress={() => {
+              void acceptIncoming();
+            }}
+          >
+            <Text style={styles.buttonText}>Annehmen</Text>
+          </Pressable>
+        </View>
+      </View>
+    </Modal>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: colors.bg,
+    alignItems: 'center',
+    justifyContent: 'center',
+    gap: 20,
+    paddingHorizontal: 32,
+  },
+  title: { color: colors.text, fontSize: 28, fontWeight: '700' },
+  subtitle: { color: colors.textMuted, fontSize: 14 },
+  actions: {
+    flexDirection: 'row',
+    gap: 24,
+    marginTop: 32,
+  },
+  button: {
+    paddingHorizontal: 28,
+    paddingVertical: 16,
+    borderRadius: 14,
+    minWidth: 140,
+    alignItems: 'center',
+  },
+  buttonAccept: { backgroundColor: colors.success },
+  buttonReject: { backgroundColor: colors.danger },
+  buttonText: { color: colors.text, fontWeight: '700', fontSize: 16 },
+});