[Bardioc1977]

An episode opened from Search, a Related shelf, Home Recently Added, "Go to Episode" or a deep link had no
route to its show: the only way was the hold menu on a card, which nothing hints at. The hero row of an
episode page now ends with a Go to Show disc (same unfurl as Restart, Mark as Watched and Play Version) that
opens the show on the episode's season. BACK returns to the episode page with the disc focused.

• The press is the existing Action::GoToShow(show_rk, season) through the existing AppFx::ItemMenu ->
  apply_item_action -> open_detail route, the one the bookmark disc already uses; the show page selects the
  season by number. No new request: the episode Detail already carries show_rk, season and its server.
• hero::show_target is the one place that says where the disc goes; the disc exists only on an episode page
  that names its show.
• New mark Icon::EpisodeList (three rows with leading dots) so no two discs of the row share art: the Play
  Version disc next to it keeps Icon::Show, and the item menu's Go to Show row keeps Icon::Show too (the
  hero and the menu deliberately wear different marks, as Restart and Play from Start do). hero::disc_icon is
  the one table of marks the draw and a test read. The art is mine and unreviewed by a designer.
• New key browse.detail.go_show in be, de, en, es, fr, hu, it, pt, ru (the hero's discs have their own keys;
  the description tells translators the label slides out and gates the row's width). The wording is a reuse of the
  shipped browse.menu.go_show strings, not a new translation (docs/localization.md asks for the reviewer to be named):
  German ("Zur Serie") is for the owner to review; be, es, fr, hu, it, pt, ru need a native reader, who has so far
  seen the words only as a menu row, not as a slide-out label.
• MAX_CTLS 7 -> 8 and DISCS 4 -> 5. ELEM_GO_SHOW = 8; a PR adding another hero control takes 9 / disc slot 5 /
  MAX_CTLS 9. No SHAPE or SCREEN_SHAPES_PIN change, no replay re-record, no new ledger entry, no
  Makefile/Cargo/CI change (so no build-bench table).
• A real bug the host route test could not see and the simulator did: BACK from the show page sent the focus to
  Play. The show's page takes the store's one current item, the episode page that BACK reveals asks its server
  again, and until the item lands the hero is only Play and the watch disc, so DetailScreen::reconcile moved a
  focus held on Go to Show to Play for the length of the load. A returning page with no item yet now holds a
  focus on a hero control (the 4th commit; the route test models the reload and fails without it). The message of 0cf2585 says the route test
  passes "BACK included"; that only became true with the 4th commit (the squash hides this).

Behaviour notes

• Specials and episodes without a season number land on the show's default season (same as the hold menu:
  Action::GoToShow's season <= 0 convention cannot tell them apart). A follow-up could thread a tri-state.
• Any row that also carries the Also available pill (it needs a second pinned source) has less room with the extra
  disc. Measured, rows that used to unfurl and now do not: en: Restart + Also available + Play Version; fr: Also
  available + Play Version, and Restart + Also available; es, it, pt, de, hu: the same two rows as fr; be and ru: a
  plain Play + Also available + Watch row, no Restart. In those rows every disc stays a circle and none crosses the
  People column (the existing degradation, tested). Rows without Also available unfurl Go to Show in all nine
  locales (test).
• A show that no longer exists leaves the pushed show page in its loading state (the only trace is the
  detail: rk=.. no metadata event-log line); BACK still works, exactly like the hold menu's Go to Show.
• Opening the show from an episode that was reached from that very show pushes a second show page; BACK unwinds.

Not in this PR: Option 2 of the issue (a Recently Added episode tile opening the show on its season) and Option 3.
Option 2 reverses the decision documented in activate_card (the tile opens the episode's page on purpose), so it
is the maintainer's call. What it would take: the deck_press_opens_show(mm, from_deck, want_play) bool pair in
app/input.rs becomes a shelf kind (Deck / Recently Added / other) decided at the Home press site (the card
menu's deck_episode_opens_show in screens/src/item_menu.rs generalised the same way, which if it needs a new
field on ItemMenuKind::Card moves SCREEN_SHAPES_PIN and forces a re-record of the three anchors; leaving the
menu as is moves nothing), plus the two tests next to a_deck_episode_press_opens_the_show_and_nothing_else_reroutes.
With this PR the show is one focus move away from every episode page, so Option 2 would only save a key press.
Refs, not Closes, for that reason.

Verification

• host, on the committed tree: make check stops at ci/test_disk_preflight.py on this machine (AssertionError: 1 != 2 : disk-preflight: only 2.0 GiB free for ~/main/rust-modules/target; this build needs ~1.0 GiB plus a 3.0 GiB reserve (4.0 GiB), an assertion about the free space of this Mac, unrelated to the change), so its parts ran
  separately and all pass: make check-cargo (lint + both unit passes: 295, 347, 732, 1246, 288, 207, 1391, 225,
  1719, 94 passed ...; hostsim pass 1906 passed, 0 failed), make test-hostsim (1173 passed), make check-nodef,
  make check-python-harness (543 tests OK), make check-replay (all six lanes SAME), make test-crate C=plx_platform T=catalog (21 passed), ci/check-deps.sh (ledgers unchanged), ci/check-module-layers.py, ci/check-list-caps.py,
  ci/check-localization.py.
• simulator (macOS, 1280x720 window, mock server, PLXNATIVE_LOCALE en / de / ru): Home Recently Added episode tile ->
  episode page -> RIGHT to the disc (the verb unfurls inside the capsule, no caption under the row) -> OK lands on
  the show with the episode's season tab selected -> BACK returns with the disc focused; a part-watched episode
  (Resume, Restart, watched, Go to Show); an episode with two versions (Play Version and Go to Show side by side,
  two different marks); Magic Remote click on the disc; movie and show pages show no disc; the hold menu on the
  tile is unchanged. Screenshots below.
• Not verified on a TV: the disc's unfurl pixels, text rasterization and the new mark at panel size are TV-only claims.
  Not exercised in the simulator: a Search-result episode, pointer hover, a row with the Also available pill, full-trailer
  mode, and an episode that is both part-watched and has two versions (the mock has none).

Screenshots

Simulator at 1280x720 against tests/mock_pms.py (synthetic library; the TV was not used).

Part-watched episode, the Go to Show disc focused (its verb unfurls)
Episode with two versions: Play Version and Go to Show side by side, different marks
Two versions, at rest
OK opens the show on the episode's season (S2)
BACK returns to the episode page with the disc still focused
German

Signed-off-by: Heiko Kopp 47413920+Bardioc1977@users.noreply.github.com

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