feat(portals): posters-only cover wall for movie and series grids (#1604)

* feat(portals): posters-only cover wall for movie and series grids

Add `Settings.showCoverTitles` (Settings > General, default on). Turning it
off drops the title row under VOD/series covers in catalog, favorites and
recent grids and reveals the title as a bottom-gradient overlay on hover and
keyboard focus, pinned open for items whose cover is missing or failed.

`CoverTitlesService` is the single resolver: the opt-out AND a hover-capable
pointer, so touch-only devices keep their titles. Live channel grids, search
results, "recently added" rails and dashboard rails always keep labels.

Catalog and collection cards become keyboard buttons (role, tabindex,
aria-label, Enter/Space, focus ring) and poster alt text is the title. The
default-on boolean coercion moves into `settings-opt-out.util.ts` because
the settings store reached the max-lines limit.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): keep nested Remove key presses from activating the card

Enter/Space on the content card's nested Remove button bubbled into the
card's own key handlers: Enter opened the item before removing it and
Space opened it while cancelling the removal. Only keys pressed on the
card element itself now activate it. Regression spec added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): keep cover titles while an in-section search filters the grid

The posters-only wall exempts search results because they are identified
by the name the user typed; the category grid's own in-section filter is
the same case, so `app-grid-list` now keeps the title row while its
`searchTerm` is non-blank. Contract docs updated, regression spec added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): keep cover titles while the collection tab search is active

The unified favorites/recent tab filters by its own search term, so its
matches are identified by name like every other search result. The tab
now opts its cards out of the posters-only wall while the term is
non-blank. Contract docs updated, regression spec added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): move the card Remove control out of the button surface

An interactive control nested inside a role="button" is an invalid
accessibility structure. The content card's activation surface is now its
own inner element and the Remove button a sibling positioned over the
poster corner, labelled by its tooltip text. Spec asserts the control is
never a descendant of the button.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): draw the collection card focus ring where it is not clipped

The card's overflow: hidden clipped an outline drawn on the inner
activation surface on every edge, so keyboard users saw no focus
indication. The ring now sits on the outer card via
:has(> .content-card__activation:focus-visible).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(portals): detect any hover-capable pointer for the posters-only wall

`hover` describes only the primary pointer, so a touch-first tablet with
a mouse or hover-capable stylus attached lost the wall. The resolver now
reads `(any-hover: hover)`.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

libs/shared/interfaces/src/lib/settings.interface.ts

@@ -241,6 +241,15 @@ export interface Settings {
     portalConnectivityGuard?: boolean;
     /** Cover/poster sizing preset applied across grids and rails */
     coverSize?: CoverSize;
+    /**
+     * Titles under movie/series covers. Default on; only an explicit false
+     * switches VOD, series, favorites and recent grids to a posters-only
+     * wall whose title appears as an overlay on hover/focus. Live channel
+     * grids, search results and the dashboard rails always keep their
+     * labels: logos are often missing, a search answers by name, and rails
+     * carry meta rows the overlay cannot hold.
+     */
+    showCoverTitles?: boolean;
     /** Live EPG panel layout: horizontal timeline (default) or vertical list */
     epgViewMode?: EpgViewMode;
     /**