feat(video_calls): fixed online indicator and in app notifications for video call

lib/features/chat/presentation/widgets/chat_user_online_status_line.dart

@@ -0,0 +1,70 @@
+import 'package:eatvio_app/core/theme/custom_text_style.dart';
+import 'package:eatvio_app/core/theme/theme_helper.dart';
+import 'package:eatvio_app/generated/l10n.dart';
+import 'package:flutter/material.dart';
+
+class ChatUserOnlineStatusLine extends StatelessWidget {
+  const ChatUserOnlineStatusLine({
+    super.key,
+    required this.isOnline,
+    required this.lastSeenText,
+    this.style,
+    this.showOnlineDot = true,
+  });
+
+  final bool isOnline;
+  final String lastSeenText;
+  final TextStyle? style;
+  final bool showOnlineDot;
+
+  @override
+  Widget build(BuildContext context) {
+    final textStyle = style ??
+        CustomTextStyles.bodySmallMulishBlack900.copyWith(height: 14 / 12);
+
+    if (isOnline) {
+      if (!showOnlineDot) {
+        return Text(
+          S.of(context).video_call_status_online,
+          maxLines: 1,
+          overflow: TextOverflow.ellipsis,
+          style: textStyle,
+        );
+      }
+      return Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Container(
+            width: 8,
+            height: 8,
+            decoration: BoxDecoration(
+              color: appTheme.greenA700,
+              shape: BoxShape.circle,
+            ),
+          ),
+          const SizedBox(width: 8),
+          Flexible(
+            child: Text(
+              S.of(context).video_call_status_online,
+              maxLines: 1,
+              overflow: TextOverflow.ellipsis,
+              style: textStyle,
+            ),
+          ),
+        ],
+      );
+    }
+
+    final trimmedLastSeen = lastSeenText.trim();
+    if (trimmedLastSeen.isEmpty) {
+      return const SizedBox.shrink();
+    }
+
+    return Text(
+      trimmedLastSeen,
+      maxLines: 1,
+      overflow: TextOverflow.ellipsis,
+      style: textStyle,
+    );
+  }
+}