Refactor dialog stuff

lib/widgets/chat_page/join_dialog.dart

@@ -0,0 +1,46 @@
+import "package:flutter/material.dart";
+import "package:flutter_hooks/flutter_hooks.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client_controller.dart";
+import "package:nexus/helpers/extensions/join_room_with_snackbars.dart";
+import "package:nexus/widgets/form_text_input.dart";
+
+class JoinDialog extends HookConsumerWidget {
+  const JoinDialog({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final roomAlias = useTextEditingController();
+    return AlertDialog(
+      title: Text("Join a Room"),
+      content: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text("Enter the room alias, ID, or a Matrix.to link."),
+          SizedBox(height: 12),
+          FormTextInput(
+            required: false,
+            capitalize: true,
+            controller: roomAlias,
+            title: "#room:server",
+          ),
+        ],
+      ),
+      actions: [
+        TextButton(onPressed: Navigator.of(context).pop, child: Text("Cancel")),
+        TextButton(
+          onPressed: () async {
+            Navigator.of(context).pop();
+
+            final client = ref.watch(ClientController.provider.notifier);
+            if (context.mounted) {
+              client.joinRoomWithSnackBars(context, roomAlias.text, ref);
+            }
+          },
+          child: Text("Join"),
+        ),
+      ],
+    );
+  }
+}