feat: Phase 1 complete — Matrix login, rooms, chat, profile

- Direct m.login.password auth against matrix.m8chat.au
- Room list with unread badges, last message, timestamps
- Chat timeline (text, images, files, replies, reactions)
- Profile screen with expandable Notifications and Security sections
- Olm E2EE initialisation (web WASM bootstrap)
- Global error handler preventing Matrix SDK crashes
- GoRouter with refreshListenable (no recreation on auth change)
- Feature-first clean architecture: Riverpod + GoRouter + Drift
- Deployed to https://app2.m8chat.au

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/features/calls/presentation/call_screen.dart

@@ -0,0 +1,73 @@
+// Version: 1.0.0 | Created: 2026-04-01
+// Call screen skeleton. Phase 2 will wire in LiveKit video/audio.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
+
+import '../domain/call_state.dart';
+import 'call_controller.dart';
+
+class CallScreen extends ConsumerWidget {
+  const CallScreen({super.key, required this.roomId});
+
+  final String roomId;
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final callState = ref.watch(callControllerProvider);
+
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: SafeArea(
+        child: Column(
+          children: [
+            Expanded(
+              child: Center(
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Icon(
+                      Icons.videocam_off_outlined,
+                      size: 80,
+                      color: Colors.white.withAlpha(153),
+                    ),
+                    const SizedBox(height: 16),
+                    Text(
+                      switch (callState) {
+                        CallConnecting() => 'Connecting...',
+                        CallEnded(:final reason) => reason ?? 'Call ended.',
+                        _ => 'Call (Phase 2)',
+                      },
+                      style: const TextStyle(color: Colors.white, fontSize: 18),
+                    ),
+                    const SizedBox(height: 8),
+                    Text(
+                      'Video calls will be available in the next release.',
+                      textAlign: TextAlign.center,
+                      style: TextStyle(
+                        color: Colors.white.withAlpha(153),
+                        fontSize: 14,
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            ),
+            Padding(
+              padding: const EdgeInsets.all(32),
+              child: FloatingActionButton(
+                backgroundColor: Colors.red,
+                onPressed: () {
+                  ref.read(callControllerProvider.notifier).endCall();
+                  context.pop();
+                },
+                child: const Icon(Icons.call_end, color: Colors.white),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}