feat: encrypted-history prompt, incoming-call alerts, message edit, panic button (v1.7.0+11)

P1 key_restore_prompt: offer recovery-key restore right after login
P2 incoming calls: mount overlay in app.dart + detect MSC3401 call.member
   (Element X signalling) — calls were previously invisible
P3 message edit: editMessage/EditMessage + Edit dialog (reactions/delete
   were already wired)
P5 panic button: new feature/panic module — hold-to-send alert text +
   m.location to a configured room; alert sent before geolocation so a
   denied permission never blocks it

All verified end-to-end in headless Chromium against production build.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/features/calls/presentation/incoming_call_overlay.dart

@@ -1,10 +1,10 @@
-// Version: 1.2.0 | Created: 2026-04-01 | Updated: 2026-04-02
+// Version: 1.3.0 | Created: 2026-04-01 | Updated: 2026-07-04
 // IncomingCallOverlay — full-screen overlay shown when an m.call.invite
 // arrives. Displays caller name/avatar, and Accept / Decline buttons.
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:go_router/go_router.dart';
+import '../../../app/router.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 import '../../../shared/widgets/matrix_avatar.dart';
@@ -58,20 +58,27 @@ class IncomingCallOverlayHost extends ConsumerWidget {
   }
 }
 
-class _IncomingCallOverlay extends StatefulWidget {
+class _IncomingCallOverlay extends ConsumerStatefulWidget {
   const _IncomingCallOverlay({required this.call});
 
   final IncomingCall call;
 
   @override
-  State<_IncomingCallOverlay> createState() => _IncomingCallOverlayState();
+  ConsumerState<_IncomingCallOverlay> createState() =>
+      _IncomingCallOverlayState();
 }
 
-class _IncomingCallOverlayState extends State<_IncomingCallOverlay> {
+class _IncomingCallOverlayState extends ConsumerState<_IncomingCallOverlay> {
   bool _dismissed = false;
+  String? _dismissedForCallId;
 
   @override
   Widget build(BuildContext context) {
+    // A new call resets the dismissal so the overlay can show again.
+    if (_dismissedForCallId != widget.call.callId) {
+      _dismissed = false;
+      _dismissedForCallId = widget.call.callId;
+    }
     if (_dismissed) return const SizedBox.shrink();
 
     final theme = Theme.of(context);
@@ -129,9 +136,13 @@ class _IncomingCallOverlayState extends State<_IncomingCallOverlay> {
                     label: 'Accept',
                     colour: Colors.green,
                     onTap: () {
-                      context.push(
-                        '/calls/${Uri.encodeComponent(call.roomId)}',
-                      );
+                      // The overlay lives above the router's navigator, so
+                      // context.push would not find GoRouter — use the
+                      // router instance directly, then dismiss the overlay.
+                      setState(() => _dismissed = true);
+                      ref
+                          .read(routerProvider)
+                          .push('/calls/${Uri.encodeComponent(call.roomId)}');
                     },
                   ),
                 ],