Refactor terminal and remove duplicate code.

lib/terminal/models/terminal_entry.dart

@@ -0,0 +1,55 @@
+import '../enums.dart';
+import 'network_log_data.dart';
+import 'js_log_data.dart';
+import 'system_log_data.dart';
+
+class TerminalEntry {
+  TerminalEntry({
+    required this.id,
+    DateTime? ts,
+    required this.source,
+    required this.level,
+    this.requestId,
+    this.correlationId,
+    this.tags = const <String>[],
+    this.network,
+    this.js,
+    this.system,
+  }) : ts = ts ?? DateTime.now();
+
+  final String id;
+  final DateTime ts;
+  final TerminalSource source;
+  final TerminalLevel level;
+  final String? requestId; // App request id for correlation
+  final String? correlationId; // Additional correlation if any
+  final List<String> tags;
+  final NetworkLogData? network;
+  final JsLogData? js;
+  final SystemLogData? system;
+
+  TerminalEntry copyWith({
+    DateTime? ts,
+    TerminalSource? source,
+    TerminalLevel? level,
+    String? requestId,
+    String? correlationId,
+    List<String>? tags,
+    NetworkLogData? network,
+    JsLogData? js,
+    SystemLogData? system,
+  }) {
+    return TerminalEntry(
+      id: id,
+      ts: ts ?? this.ts,
+      source: source ?? this.source,
+      level: level ?? this.level,
+      requestId: requestId ?? this.requestId,
+      correlationId: correlationId ?? this.correlationId,
+      tags: tags ?? this.tags,
+      network: network ?? this.network,
+      js: js ?? this.js,
+      system: system ?? this.system,
+    );
+  }
+}