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>

CLAUDE.md

@@ -531,6 +531,8 @@ The live EPG panel is a horizontal **timeline ribbon** under the player (`app-ep
 
 **Collapsible live channel rail** (M3U player, Xtream/Stalker live layouts, unified favorites/recent live tab): collapse state is owned by `LiveLayoutSidebarStateService` (`@iptvnator/portal/shared/util`) and kept per surface (`m3u` / `portal` / `collection`, localStorage `live-sidebar-state:<surface>`); the pre-split shared key `live-sidebar-state` is forgotten on startup and never read (issue #1458: one stored `collapsed` hid every channel list in the app behind a 32px chevron and survived restart, "Remove all playlists" and re-import). The workspace header renders a `view_sidebar` toggle on every route that renders its own rail (`resolveRouteLiveSidebarSurface`) so the control exists in both states, and a collapsed rail with nothing playing shows `app-channel-list-hidden-state` (title + hint + "Show channels list" button) instead of "select a channel". Contract: "Collapsible Live Sidebar" in `docs/architecture/iptvnator-ui-guidelines.md`.
 
+**Cover grids** (Xtream/Stalker VOD + series catalogs, favorites/recent, dashboard rails): sized by `Settings.coverSize` (small/medium/large → `--cover-grid-min-width`/`--cover-rail-width`/`--cover-gap`, written to `<html data-cover-size>` in `app.component.ts`, tokens in `apps/web/src/_cover-size.scss`). `Settings.showCoverTitles` (Settings → General, default on; only an explicit `false` opts out, coerced with the other default-on flags in `libs/services/src/lib/settings-opt-out.util.ts`) turns VOD/series grids into a posters-only wall: the title row is dropped and a `.cover-title-overlay` caption slides in on hover/`:focus-visible`, pinned open when the cover is missing or failed. `CoverTitlesService` (`libs/portal/shared/ui`) is the single resolver — opt-out AND a `(any-hover: hover)` pointer, so touch-only devices keep titles. Live channel grids, search results (search pages pass `[allowPostersOnly]="false"` to `app-content-card`; `app-grid-list` and `app-unified-grid-tab` keep titles while their `searchTerm` is non-blank), "recently added" rails and dashboard rails always keep their labels. Catalog and collection cards are keyboard buttons (`role="button"`, Enter/Space, focus ring). Contract: "Cover Grids" in `docs/architecture/iptvnator-ui-guidelines.md`.
+
 **Radio Channel Layout** (when `channel.radio === 'true'`):
 
 ```