fix(persistence): recover transient save refusals without edits - #470

… of the full player (#472)

* refactor(feeds): drop the ignored FeedRepository cache option

Feeds are always cached since #468. The constructor still accepted a
cache option that nothing read, and eight view tests still passed it.

* refactor(player): move Next in queue into PlayerController.playNext

The headset's Next in queue read the queue store and called play inline in
bindMediaSession. PlayerController now owns it, beside play and the natural
end's queue advance.

* fix(settings): say an import that could not save yet saves by itself

Since #470, PodNotes saves on its own once it can write data.json again.
The Notice after an import whose final save failed still told the user to
change a setting to save again.

* refactor(ui): co-locate each component's styles and split Deck and Panel out of Player

PodcastView.svelte held 1,300 lines of page and component CSS in one global
block. Each component now carries its own styles, anchored on its own root
class with the `.root :global {}` pattern the shell already used. The shell
keeps its tokens, its layout, the Obsidian DOM rules and the classes several
components share.

Player.svelte loses the deck (title, scrubber, transport, capture bar) to
Deck.svelte, and ChaptersPanel and UpNextPanel share their chrome through
Panel.svelte. Cover draws a local file's tile, and SearchField takes the
first run's large variant, so no page reaches into them for it.

Variants of the shared .pn-iconbtn and .pn-btn classes win by specificity
instead of by stylesheet order.

* test(player): format the playNext tests

* feat(ui): move between the wide player's tabs with arrow keys

The Chapters and Up next tabs follow the ARIA tabs pattern: Left and Right
move focus to the previous or next tab and wrap, Home and End go to the
first and last, and the focused tab shows its panel. Only the selected tab
is in the Tab order.

* fix(ui): hide the fullscreen button in fullscreen and let play respect reduced motion

In fullscreen the video frame's fullscreen button stayed visible and did
nothing. It now hides there; Escape leaves fullscreen.

The play button's 120 ms press transition ran even when the system asks for
reduced motion. It now presses without a transition then.

* refactor(verify): split screens.mjs by concern

screens.mjs grew past 1,100 lines. It keeps its usage header, the verb
dispatch and set; the instance calls, the seeded scenes and the contact sheet
move to screens/instance.mjs, screens/scenes.mjs and screens/sheet.mjs. The
code moved verbatim apart from imports, exports and the paths that moved one
directory down.

* refactor(ui): keep each button's touch cascade and move queue rows into EpisodeRow

On a touch device Obsidian adds .mobile-tap to a tapped button, and its
button:not(.clickable-icon).mobile-tap rule paints a fill. Search results,
playlist rows, chapter rows and Up next's Edit button keep the specificity
that resisted it, and the mini player's open button and the rail's add
button keep the plain scoped rules that let it through.

Queue rows are an EpisodeRow variant (queue, dragging) instead of rules
QueueList laid over EpisodeRow and Cover. Deck no longer takes `wide`: the
player passes no onchapters when the chapter name cannot open a panel.
.pn-alt moves whole into AddPodcastPage, and the shell's head and back
button rules move from the shared block to its layout.