Add dashboard version button and self-update UI wiring

dashcaddy-api/.eslintrc.js

@@ -54,11 +54,25 @@ module.exports = {
       },
     },
     {
-      // Frontend assets use browser globals
+      // Browser-side assets (client JS)
       files: ['assets/**/*.js', 'frontend/**/*.js'],
       env: {
         browser: true,
         es2021: true,
+        node: false,
+      },
+      globals: {
+        // Common dashboard globals from status/index.html context
+        apiUrl: 'readonly',
+        API_BASE_URL: 'readonly',
+        CONFIG: 'readonly',
+        // Client-side dashboard classes (loaded via script tags)
+        ErrorHandler: 'readonly',
+        ProgressTracker: 'readonly',
+        ThemeAdapter: 'readonly',
+        DnsTemplateSelector: 'readonly',
+        TourManager: 'readonly',
+        TooltipDefinitions: 'readonly',
       },
       rules: {
         'no-undef': 'warn',