Palette: seven roles (accent, good, caution added; highlight renamed alarm); no hard-coded colours left

background, foreground, subdued, accent (emphasis without danger), and the state
gradient good → caution → alarm; surface and onFill derived. smart-serow's
four-key themes still load (highlight = alarm; the new roles fall back).
Material's scheme follows: buttons in accent instead of the alarm colour.
Link state, mock banner, signal tiles, raw log, checklist button and marks,
camera page all take palette roles.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

lib/camview.dart

@@ -10,6 +10,8 @@ import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 
+import 'theme/palette.dart';
+
 const camviewPort = 7710;
 
 class CamView extends ChangeNotifier {
@@ -165,7 +167,7 @@ class _CamViewPageState extends State<CamViewPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      backgroundColor: Colors.black,
+      backgroundColor: AppTheme.of(context).background,
       appBar: AppBar(title: const Text('Camera (test)')),
       body: SafeArea(
         child: ListenableBuilder(
@@ -182,7 +184,7 @@ class _CamViewPageState extends State<CamViewPage> {
                             cam.available == false
                                 ? 'Camera unavailable on the Orin'
                                 : cam.status,
-                            style: const TextStyle(color: Colors.white70),
+                            style: TextStyle(color: AppTheme.of(context).subdued),
                           ),
                         )
                       : Image.memory(