feat(design): one media card, and Home's hero and shelves as cards (E28 S3h)

- ui/MediaCard + mediaCardStyles: one frame for every video, Plex title and
  Home tile; the meta line pinned to the bottom edge, the length a badge on
  the picture, the media Play only where the click plays, the hover row at
  the picture's bottom-right (the owner's pick C).
- Shelf density: on any strip a one-line title over one meta line; mixed
  Home shelves are landscape; rails turn content-visibility off (a card's
  reserved height had become the strip's). Home slot 232px, so the Play
  and the hover row no longer touch; a landscape shelf takes the small Play.
- Home hero is a card (hover row, the whole menu, a touch "…"), three
  quarters wide and centred; channel / playlist tiles get Play, open and
  "…"; a show tile acts on its next episode, ⓘ opens the show.
- Plex preview: a ~0.9 s mouse rest opens a passive panel with the whole
  title, facts and synopsis (popover `pointerOnly`); the synopsis and title
  tooltips are gone.
- Compact list row B: the title leads, "…" at the end, toggles over the
  date on hover.
- Media-info layout B (collections, crew, cast beside the facts sidebar;
  an empty column is not drawn); filtering values are chips there and on
  the show page; "Cast" over the cast-only strips.
- Browse tiles hover like a card; prose capped by the `measure` utility.

frontend/src/components/ui/pressableSelectable.contract.test.ts

@@ -16,7 +16,10 @@ const files = import.meta.glob(["../**/*.tsx", "!../**/*.test.*", "!../design-la
 
 /** file → [how many plain Pressables, why they are not titles]. */
 const PLAIN: Record<string, [number, string]> = {
-  "Home.tsx": [1, "the hero's picture (named by aria-label; its title sits outside)"],
+  "Home.tsx": [
+    2,
+    "the hero's picture and a shelf tile's picture (each named by aria-label; its title sits outside)",
+  ],
   "LanguageSwitcher.tsx": [1, "an option row"],
   "NavSidebar.tsx": [4, "the account trigger and its menu rows"],
   "PaletteLauncher.tsx": [2, "launcher controls"],