refactor(search-reservations): replace native date inputs with flatpickr

[JohnVillalovos]

• Convert begin/end date fields from native inputs to text to use flatpickr
• Use document.getElementById for element access instead of jQuery
• Replace jQuery .change() with .on('change') for event handling
• Add setFlatpickrDisabled(input, disabled) to properly enable/disable flatpickr and its altInput
• Close flatpickr calendar when disabled
• Remove unused hidden formatted date inputs and AltId usage in DatePickerSetupControl
• Drop resourcePopup.js and Qtip includes
• Remove obsolete hover highlight code

[Copilot]

Pull request overview

This PR refactors the Search Reservations UI to rely on Flatpickr-driven date inputs (instead of native <input type="date"> + hidden formatted fields) and reduces jQuery usage / legacy dependencies on that page.

Changes:

• Convert begin/end date fields to text inputs that submit directly via {formname ...} and initialize via DatePickerSetupControl (Flatpickr).
• Update reservation-search.js event wiring and add a helper to properly enable/disable Flatpickr inputs (including altInput).
• Remove Qtip/resource popup includes and obsolete hover-highlight code.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
tpl/Search/search-reservations.tpl	Replaces native date inputs + hidden formatted fields with Flatpickr setup; removes Qtip/resourcePopup includes.
Web/scripts/reservation-search.js	Refactors date element access and range-change handling; adds Flatpickr-aware enable/disable behavior.