Fixes #20: Call updateSectionVisibility() during init to show equipment tab

The equipment section has display:none in CSS and updateSectionVisibility()
is the only function that calls .show() on it. It was never called during
initialization, only when settings toggles changed. Added the call to the
main init flow so the equipment tab becomes visible on page load.

src/systems/ui/desktop.js

@@ -7,6 +7,7 @@ import { i18n } from '../../core/i18n.js';
 import { extensionSettings, lastGeneratedData, committedTrackerData } from '../../core/state.js';
 import { hexToRgba } from './theme.js';
 import { repairJSON } from '../../utils/jsonRepair.js';
+import { invalidateCache } from './renderUtils.js';
 
 /**
  * Helper to parse time string and calculate clock hand angles