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/chat/presentation/message_input.dart

@@ -0,0 +1,115 @@
+// Version: 1.0.0 | Created: 2026-04-01
+// Message input bar. Text field + send button.
+
+import 'package:flutter/material.dart';
+
+class MessageInput extends StatefulWidget {
+  const MessageInput({
+    super.key,
+    required this.onSend,
+    required this.isSending,
+  });
+
+  final Future<void> Function(String text) onSend;
+  final bool isSending;
+
+  @override
+  State<MessageInput> createState() => _MessageInputState();
+}
+
+class _MessageInputState extends State<MessageInput> {
+  final _controller = TextEditingController();
+  bool _hasText = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller.addListener(() {
+      final hasText = _controller.text.trim().isNotEmpty;
+      if (hasText != _hasText) {
+        setState(() => _hasText = hasText);
+      }
+    });
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  Future<void> _submit() async {
+    final text = _controller.text.trim();
+    if (text.isEmpty) return;
+    _controller.clear();
+    await widget.onSend(text);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return Container(
+      padding: const EdgeInsets.fromLTRB(8, 8, 8, 12),
+      decoration: BoxDecoration(
+        color: theme.colorScheme.surface,
+        border: Border(
+          top: BorderSide(color: theme.colorScheme.outline.withAlpha(51)),
+        ),
+      ),
+      child: SafeArea(
+        top: false,
+        child: Row(
+          children: [
+            IconButton(
+              icon: const Icon(Icons.add),
+              tooltip: 'Attach file (Phase 2)',
+              onPressed: null, // Phase 2
+              color: theme.colorScheme.onSurface.withAlpha(153),
+            ),
+            Expanded(
+              child: TextField(
+                controller: _controller,
+                decoration: const InputDecoration(
+                  hintText: 'Message',
+                  contentPadding: EdgeInsets.symmetric(
+                    horizontal: 16,
+                    vertical: 10,
+                  ),
+                ),
+                textInputAction: TextInputAction.send,
+                onSubmitted: (_) => _submit(),
+                maxLines: null,
+                keyboardType: TextInputType.multiline,
+              ),
+            ),
+            const SizedBox(width: 8),
+            AnimatedSwitcher(
+              duration: const Duration(milliseconds: 150),
+              child: widget.isSending
+                  ? const SizedBox(
+                      width: 40,
+                      height: 40,
+                      child: Center(
+                        child: SizedBox(
+                          width: 20,
+                          height: 20,
+                          child: CircularProgressIndicator(strokeWidth: 2.5),
+                        ),
+                      ),
+                    )
+                  : IconButton(
+                      icon: const Icon(Icons.send_rounded),
+                      onPressed: _hasText ? _submit : null,
+                      color: _hasText
+                          ? theme.colorScheme.primary
+                          : theme.colorScheme.onSurface.withAlpha(77),
+                      tooltip: 'Send message',
+                    ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}