Async component init (e.g. MultiSelect replacing <select> with hidden
inputs) mutated the DOM after the initial form state snapshot, causing
a phantom "unsaved fields" warning. Re-baseline the initial state on
structural DOM changes until the first user interaction.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
DRY duplicated helpers (escapeAttr, belongsToForm, isSubmitControl,
isEditableTarget) into web/js/core/app-form-utils.js and update 7
consumers. Add aria-live="polite" to flash messages, async messages,
and search results for screen reader announcements. Add
prefers-reduced-motion support to CSS tooltips.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>