fix(forms): clear native date inputs correctly in signal forms when changed via native UI#67416
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…hanged via native UI When a native date input gets cleared manually by a user via the internal browser UI, the element changes from invalid to valid, but no `input` event is emitted. This commit introduces `InputValidityMonitor`, an injectable service that intercepts these edge-case native status changes. The monitor dynamically installs CSP-compliant styles appending specific animation keyframes for `:valid` and `:invalid` pseudoclasses on native form controls. By attaching an `animationstart` listener, Angular intercepts these changes immediately and re-invokes the parser. Fixes angular#67300
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When a native date input gets cleared manually by a user via the internal browser UI, the element changes from invalid to valid, but no
inputevent is emitted.This commit introduces
InputValidityMonitor, an injectable service that intercepts these edge-case native status changes. The monitor dynamically installs CSP-compliant styles appending a specific--ng-validityCSS variable to:validand:invalidpseudoclasses on native form controls as a property transition. By attaching atransitionstartlistener, Angular intercepts these changes immediately and re-invokes the parser.Fixes #67300