refactor: extract consistent AppBar builder, remove icon from EVENT LOG title

- Add buildTracPulseAppBar() helper in lib/app_bar.dart
  - Reads backgroundColor/elevation from ThemeData.appBarTheme
  - Consistent back button (#9e9e9e, size 20) via Navigator.pop
  - Monospace title style (14px, weight 700, letter-spacing 2)
  - Optional onTitleTap for tappable titles
- Update all screens to use the new helper, removing redundant overrides
- Remove terminal icon from status_screen title, use plain centered text
- Change appBarTheme centerTitle to false (left-aligned)
- Remove bottom dividers from all screens

lib/app_bar.dart

@@ -0,0 +1,55 @@
+import 'package:flutter/material.dart';
+
+/// Consistent AppBar builder for TracPulse screens.
+///
+/// Reads base styles (backgroundColor, elevation) from the current
+/// [ThemeData.appBarTheme], then applies TracPulse's standard back button
+/// and title styling on top.
+///
+/// Parameters:
+/// - [title] – App bar title text (left-aligned, monospace, 14px, weight 700, letter-spacing 2)
+/// - [actions] – optional list of action [IconButton]s placed on the right
+/// - [onTitleTap] – optional callback when the title is tapped (e.g. Easter egg)
+AppBar buildTracPulseAppBar({
+  required String title,
+  List<Widget>? actions,
+  VoidCallback? onTitleTap,
+}) {
+  return AppBar(
+    // Inherit backgroundColor, elevation from theme (defined once in MaterialApp.appBarTheme)
+    automaticallyImplyLeading: true,
+    actions: actions,
+    title: onTitleTap != null
+        ? GestureDetector(
+            onTap: onTitleTap,
+            child: Text(
+              title,
+              style: const TextStyle(
+                fontFamily: 'monospace',
+                fontSize: 14,
+                fontWeight: FontWeight.w700,
+                letterSpacing: 2,
+                color: Color(0xFFe0e0e0),
+              ),
+            ),
+          )
+        : Text(
+            title,
+            style: const TextStyle(
+              fontFamily: 'monospace',
+              fontSize: 14,
+              fontWeight: FontWeight.w700,
+              letterSpacing: 2,
+              color: Color(0xFFe0e0e0),
+            ),
+          ),
+    // Consistent back button: #9e9e9e, size 20 (distinct from title #e0e0e0)
+    leading: Builder(
+      builder: (context) => IconButton(
+        icon: const Icon(Icons.arrow_back, color: Color(0xFF9e9e9e), size: 20),
+        onPressed: () => Navigator.pop(context),
+      ),
+    ),
+    leadingWidth: 48,
+  );
+}

lib/info_screen.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import 'app_bar.dart';
+
 class InfoScreen extends StatelessWidget {
   const InfoScreen({super.key});
 
@@ -7,32 +9,7 @@ class InfoScreen extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: const Color(0xFF0d0d0d),
-      appBar: AppBar(
-        backgroundColor: const Color(0xFF161616),
-        elevation: 0,
-        leading: IconButton(
-          icon: const Icon(
-            Icons.arrow_back,
-            color: Color(0xFF9e9e9e),
-            size: 20,
-          ),
-          onPressed: () => Navigator.pop(context),
-        ),
-        title: const Text(
-          'HOW IT WORKS',
-          style: TextStyle(
-            fontFamily: 'monospace',
-            fontSize: 14,
-            fontWeight: FontWeight.w700,
-            letterSpacing: 2,
-            color: Color(0xFFe0e0e0),
-          ),
-        ),
-        bottom: PreferredSize(
-          preferredSize: const Size.fromHeight(1),
-          child: Container(height: 1, color: const Color(0xFF2a2a2a)),
-        ),
-      ),
+      appBar: buildTracPulseAppBar(title: 'HOW IT WORKS'),
       body: ListView(
         padding: const EdgeInsets.all(20),
         children: [

lib/main.dart

@@ -38,7 +38,7 @@ class TracPulseApp extends StatelessWidget {
           secondary: Color(0xFF00e676),
         ),
         appBarTheme: const AppBarTheme(
-          centerTitle: true,
+          centerTitle: false,
           backgroundColor: Color(0xFF161616),
           foregroundColor: Color(0xFFe0e0e0),
           elevation: 0,

lib/settings_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+import 'app_bar.dart';
 import 'bridge/location_bridge.dart';
 import 'info_screen.dart';
 import 'preferences.dart';
@@ -131,34 +132,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: const Color(0xFF0d0d0d),
-      appBar: AppBar(
-        backgroundColor: const Color(0xFF161616),
-        elevation: 0,
-        leading: IconButton(
-          icon: const Icon(
-            Icons.arrow_back,
-            color: Color(0xFF9e9e9e),
-            size: 20,
-          ),
-          onPressed: () => Navigator.pop(context),
-        ),
-        title: GestureDetector(
-          onTap: _handleAppBarTap,
-          child: const Text(
-            'SETTINGS',
-            style: TextStyle(
-              fontFamily: 'monospace',
-              fontSize: 14,
-              fontWeight: FontWeight.w700,
-              letterSpacing: 2,
-              color: Color(0xFFe0e0e0),
-            ),
-          ),
-        ),
-        bottom: PreferredSize(
-          preferredSize: const Size.fromHeight(1),
-          child: Container(height: 1, color: const Color(0xFF2a2a2a)),
-        ),
+      appBar: buildTracPulseAppBar(
+        title: 'SETTINGS',
+        onTitleTap: _handleAppBarTap,
         actions: [
           IconButton(
             icon: const Icon(

lib/status_screen.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
+import 'app_bar.dart';
 import 'bridge/location_bridge.dart';
 
 class StatusScreen extends StatefulWidget {
@@ -179,33 +180,8 @@ class _StatusScreenState extends State<StatusScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: const Color(0xFF0d0d0d),
-      appBar: AppBar(
-        backgroundColor: const Color(0xFF161616),
-        elevation: 0,
-        title: Row(
-          children: [
-            const Icon(Icons.terminal, color: Color(0xFF00bcd4), size: 18),
-            const SizedBox(width: 10),
-            const Text(
-              'EVENT LOG',
-              style: TextStyle(
-                fontFamily: 'monospace',
-                fontSize: 14,
-                fontWeight: FontWeight.w700,
-                letterSpacing: 2,
-                color: Color(0xFFe0e0e0),
-              ),
-            ),
-          ],
-        ),
-        leading: IconButton(
-          icon: const Icon(
-            Icons.arrow_back,
-            color: Color(0xFF9e9e9e),
-            size: 20,
-          ),
-          onPressed: () => Navigator.pop(context),
-        ),
+      appBar: buildTracPulseAppBar(
+        title: 'EVENT LOG',
         actions: [
           IconButton(
             icon: const Icon(
@@ -220,10 +196,6 @@ class _StatusScreenState extends State<StatusScreen> {
             onPressed: _loadLogs,
           ),
         ],
-        bottom: PreferredSize(
-          preferredSize: const Size.fromHeight(1),
-          child: Container(height: 1, color: const Color(0xFF2a2a2a)),
-        ),
       ),
       body: Column(
         children: [