fix: align logging.enabled default to schema (true)

dashboardapiConfig.json declares `logging.enabled.default: true` but:
- dashboardapi.html defaulted `enableLog: false`
- src/specificClass.js `_buildConfig` used `Boolean(...)` which
  coerced undefined to false, overriding the schema default.

Aligned both to the schema: HTML default = true; _buildConfig now
uses `?? true` so an unspecified config follows the schema.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

dashboardapi.html

@@ -7,7 +7,7 @@
     color: '#4f8582',
     defaults: {
       name: { value: '' },
-      enableLog: { value: false },
+      enableLog: { value: true },
       logLevel: { value: 'info' },
 
       protocol: { value: 'http' },

src/specificClass.js

@@ -55,7 +55,7 @@ class DashboardApi {
       general: {
         name: config?.general?.name || 'dashboardapi',
         logging: {
-          enabled: Boolean(config?.general?.logging?.enabled),
+          enabled: config?.general?.logging?.enabled ?? true,
           logLevel: config?.general?.logging?.logLevel || 'info',
         },
       },