feat: update terminal entry constructor to initialize timestamp by default

lib/models/terminal/terminal_entry.dart

@@ -6,7 +6,7 @@ import 'system_log_data.dart';
 class TerminalEntry {
   TerminalEntry({
     required this.id,
-    required this.ts,
+    DateTime? ts,
     required this.source,
     required this.level,
     this.requestId,
@@ -15,7 +15,7 @@ class TerminalEntry {
     this.network,
     this.js,
     this.system,
-  });
+  }) : ts = ts ?? DateTime.now();
 
   final String id;
   final DateTime ts;

lib/providers/terminal_providers.dart

@@ -63,7 +63,6 @@ class TerminalController extends StateNotifier<TerminalState> {
     final id = _newId();
     final entry = TerminalEntry(
       id: id,
-      ts: DateTime.now(),
       source: TerminalSource.network,
       level: TerminalLevel.info,
       requestId: requestId,
@@ -143,7 +142,6 @@ class TerminalController extends StateNotifier<TerminalState> {
   }) {
     append(TerminalEntry(
       id: _newId(),
-      ts: DateTime.now(),
       source: TerminalSource.js,
       level: switch (level) {
         'warn' => TerminalLevel.warn,
@@ -170,7 +168,6 @@ class TerminalController extends StateNotifier<TerminalState> {
   }) {
     append(TerminalEntry(
       id: _newId(),
-      ts: DateTime.now(),
       source: TerminalSource.system,
       level: level,
       tags: tags,