♻️ Refactor thought widgets

lib/widgets/thought/thought_header.dart

@@ -0,0 +1,52 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:material_symbols_icons/material_symbols_icons.dart';
+
+class ThoughtHeader extends StatelessWidget {
+  const ThoughtHeader({
+    super.key,
+    required this.isStreaming,
+    required this.isUser,
+  });
+
+  final bool isStreaming;
+  final bool isUser;
+
+  @override
+  Widget build(BuildContext context) {
+    if (!isStreaming) {
+      return Row(
+        spacing: 6,
+        children: [
+          Icon(
+            isUser ? Symbols.person : Symbols.smart_toy,
+            size: 16,
+            color:
+                isUser
+                    ? Theme.of(context).colorScheme.primary
+                    : Theme.of(context).colorScheme.secondary,
+            fill: 1,
+          ),
+          Text(
+            isUser ? 'thoughtUserName'.tr() : 'aiThought'.tr(),
+            style: Theme.of(context).textTheme.titleSmall!.copyWith(
+              fontWeight: FontWeight.w600,
+              color:
+                  isUser
+                      ? Theme.of(context).colorScheme.primary
+                      : Theme.of(context).colorScheme.secondary,
+            ),
+          ),
+        ],
+      );
+    } else {
+      return Text(
+        'aiThought'.tr(),
+        style: Theme.of(context).textTheme.titleSmall!.copyWith(
+          fontWeight: FontWeight.w600,
+          color: Theme.of(context).colorScheme.primary,
+        ),
+      );
+    }
+  }
+}