* Harmonize DateTimePicker styling with each theme palette
The jQuery UI datepicker and timepicker addon rendered with the stock ThemeRoller texture-image backgrounds and a generic gray/green look that did not match any theme (most visible in the deepness dark theme). Add per-theme, picker-scoped overrides to every theme's jquery.timepicker.css so the popup surface, header, weekday labels, day cells, selected/hover/today states, Now/Done buttons, and the time sliders use each theme's own accent and content colors. Rules are scoped to .ui-datepicker so other jQuery UI widgets are unaffected.
* Address DateTimePicker a11y review (develop)
- Reset the nav-icon filter on prev/next hover (cacti, paw, raspberry) so the dark jQuery UI sprite stays visible on the pale hover tint.
- Give carrot and hollyberry a dark header title + dark nav icons so the month/year text clears AA on the light-ish accent header.
- Carrot: move to the theme's darker orange (#d2691e) for the today outline and sliders, and use a dark foreground on the orange selected-day/button fills.
- cacti and hollyberry: dark foreground on the accent selected-day/button fills to clear 4.5:1.
- paper-plane and sunrise: invert the icon sprite to white so the arrows are visible on their dark headers.
- dark and modern: add an explicit focus outline on the time-slider handles (both themes suppress the browser outline globally).
- midwinter: rebuild the override on the theme palette variables so the picker follows dark/light mode, with the theme blue as a fixed AA accent.
* Add 'Deepness' theme to develop; midwinter billboard + deviceStatus hook
Forward-ports the Deepness theme (1.2.x #8202 + #8205) to develop as one change: the full include/themes/deepness/ theme (emerald-dark :root palette, Paw layout/top-tab JS, full billboard.js 3.13 overload CSS, dark widget CSS), the themes allowlist entry, the i18n_themes name, the midwinter billboard overload rules, and the shared 'deviceStatus' hook class in get_colored_device_status() that the theme styles as status pills. Paper-plane is intentionally untouched (worked separately). The lib/html.php favicon/arrow tweaks from 1.2.x are omitted - develop handles those via get_md5_include_icon()/get_theme_paths() and the theme's own .actionsDropdownArrow CSS.
* deepness: align main.js with Paw parent (drop stale host_id autocomplete & graphDrillDown, fix search-icon/handler leaks)
* deepness: drop bundled billboard.css (obsolete per-theme file; central include/css/billboard.css + main.css .bb overloads cover it)
* i18n: add 'Deepness' theme name to cacti.pot translation template
* Deepness: apply php-cs-fixer formatting and refresh sink inventory baseline
php-cs-fixer fixes the single-quote and // comment style in the deepness theme index.php/rrdtheme.php files, and the sink inventory baseline records the header_redirect sinks in the new deepness index.php files.
* tests: stop the boost upgrade integration test leaking IN_CACTI_INSTALL
BoostProcessTableUpgradeIntegrationTest defined IN_CACTI_INSTALL at file (collection) scope, so it was set for the whole shared pest process and made CactiErrorHandler() take its install-mode early-return. That broke CactiErrorHandlerSuppressionTest ('an enabled level is logged...' expected false, got true) in the pest coverage gate and the locked integration job. The upgrade files required here do not check the constant at load time (only lib/database.php does, at runtime inside its schema probes), so define it in beforeEach after the DB connects instead -- it is never set at collection time and, with no DB in CI, the test skips without defining it. Full pest suite: 2664 passed, 0 failed.
TheWitness