revised image asset structure

pi/ui/assets/.gitignore

@@ -0,0 +1,4 @@
+# Ignore font files (may have licensing restrictions)
+# Keep .gitkeep to preserve directory structure
+fonts/*
+!fonts/.gitkeep

pi/ui/assets/images/.gitignore

@@ -1,2 +0,0 @@
-# Generated/symlinked images - created by prepare_assets.sh
-rei_default.png

pi/ui/config.json

@@ -1,4 +1,6 @@
 {
+  "assets_path": "/home/pi/smartserow-ui/assets",
+  "navigator": "rei",
   "overheat": {
     "threshold_celsius": 75.0,
     "trigger_duration_sec": 10,

pi/ui/fonts/.gitignore

@@ -1,3 +0,0 @@
-# Generated/symlinked font files - created by prepare_assets.sh
-din1451alt.ttf
-NotoSans-*.ttf

pi/ui/lib/main.dart

@@ -21,7 +21,6 @@ class SmartSerowApp extends StatelessWidget {
         ),
         useMaterial3: true,
         fontFamily: 'DIN1451',
-        fontFamilyFallback: const ['NotoSans', 'Roboto'],
       ),
       home: const AppRoot(),
     );

pi/ui/lib/screens/dashboard_screen.dart

@@ -1,7 +1,9 @@
 import 'dart:async';
+import 'dart:io';
 import 'dart:math';
 import 'package:flutter/material.dart';
 
+import '../services/config_service.dart';
 import '../services/pi_io.dart';
 import '../widgets/stat_box.dart';
 
@@ -46,6 +48,21 @@ class _DashboardScreenState extends State<DashboardScreen> {
     super.dispose();
   }
 
+  /// Build navigator image from filesystem
+  Widget _buildNavigatorImage() {
+    final config = ConfigService.instance;
+    final imagePath = '${config.assetsPath}/navigator/${config.navigator}/default.png';
+
+    return Image.file(
+      File(imagePath),
+      fit: BoxFit.contain,
+      errorBuilder: (context, error, stackTrace) {
+        // Graceful fallback - empty box if image missing
+        return const SizedBox.shrink();
+      },
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -127,14 +144,7 @@ class _DashboardScreenState extends State<DashboardScreen> {
             Expanded(
               flex: 1,
               child: Center(
-                child: Image.asset(
-                  'assets/images/rei_default.png',
-                  fit: BoxFit.contain,
-                  errorBuilder: (context, error, stackTrace) {
-                    // Graceful fallback - empty box if image missing
-                    return const SizedBox.shrink();
-                  },
-                ),
+                child: _buildNavigatorImage(),
               ),
             ),
           ],

pi/ui/lib/services/config_service.dart

@@ -16,6 +16,10 @@ class ConfigService {
   static const double _defaultThreshold = 80.0;
   static const int _defaultTriggerDuration = 10;
   static const int _defaultShutdownDelay = 10;
+  static const String _defaultNavigator = 'rei';
+
+  // Executable directory (for fallback paths)
+  late final String _exeDir;
 
   /// Load config from JSON file
   ///
@@ -24,11 +28,12 @@ class ConfigService {
   Future<void> load() async {
     if (_loaded) return;
 
+    // Config file sits next to the executable
+    final exePath = Platform.resolvedExecutable;
+    _exeDir = File(exePath).parent.path;
+
     try {
-      // Config file sits next to the executable
-      final exePath = Platform.resolvedExecutable;
-      final exeDir = File(exePath).parent.path;
-      final configPath = '$exeDir${Platform.pathSeparator}config.json';
+      final configPath = '$_exeDir${Platform.pathSeparator}config.json';
 
       final file = File(configPath);
       if (await file.exists()) {
@@ -66,4 +71,19 @@ class ConfigService {
     if (value is int) return Duration(seconds: value);
     return Duration(seconds: _defaultShutdownDelay);
   }
+
+  /// Path to external assets directory
+  String get assetsPath {
+    final value = _config?['assets_path'];
+    if (value is String && value.isNotEmpty) return value;
+    // Fallback: assets/ next to executable
+    return '$_exeDir${Platform.pathSeparator}assets';
+  }
+
+  /// Navigator character name (subfolder in assets/navigator/)
+  String get navigator {
+    final value = _config?['navigator'];
+    if (value is String && value.isNotEmpty) return value;
+    return _defaultNavigator;
+  }
 }

pi/ui/pubspec.lock

@@ -45,10 +45,10 @@ packages:
     dependency: transitive
     description:
       name: fake_async
-      sha256: "6a95e56b2449df2273fd8c45a662d6947ce1ebb7aafe80e550a3f68297f3cacc"
+      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.2"
+    version: "1.3.3"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -71,26 +71,26 @@ packages:
     dependency: transitive
     description:
       name: leak_tracker
-      sha256: c35baad643ba394b40aac41080300150a4f08fd0fd6a10378f8f7c6bc161acec
+      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.8"
+    version: "11.0.2"
   leak_tracker_flutter_testing:
     dependency: transitive
     description:
       name: leak_tracker_flutter_testing
-      sha256: f8b613e7e6a13ec79cfdc0e97638fddb3ab848452eff057653abd3edba760573
+      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.9"
+    version: "3.0.10"
   leak_tracker_testing:
     dependency: transitive
     description:
       name: leak_tracker_testing
-      sha256: "6ba465d5d76e67ddf503e1161d1f4a6bc42306f9d66ca1e8f079a47290fb06d3"
+      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "3.0.2"
   lints:
     dependency: transitive
     description:
@@ -180,18 +180,18 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: fb31f383e2ee25fbbfe06b40fe21e1e458d14080e3c67e7ba0acfde4df4e0bbd
+      sha256: "522f00f556e73044315fa4585ec3270f1808a4b186c936e612cab0b565ff1e00"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.4"
+    version: "0.7.6"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
+    version: "2.2.0"
   vm_service:
     dependency: transitive
     description:
@@ -201,5 +201,5 @@ packages:
     source: hosted
     version: "14.3.1"
 sdks:
-  dart: ">=3.7.0-0 <4.0.0"
+  dart: ">=3.8.0-0 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"

pi/ui/pubspec.yaml

@@ -18,17 +18,7 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-  assets:
-    - assets/images/
-
   fonts:
     - family: DIN1451
       fonts:
-        - asset: fonts/din1451alt.ttf
-    - family: NotoSans
-      fonts:
-        - asset: fonts/NotoSans-Regular.ttf
-        - asset: fonts/NotoSans-Bold.ttf
-          weight: 700
-        - asset: fonts/NotoSans-Light.ttf
-          weight: 300
+        - asset: assets/fonts/din1451alt.ttf