Replaces the letterboxed 144x80 icon + cropped PIC1 with official-looking
PS1 Classics art:
- ICON0 (80x80): cover art composited into the bundled case frame (PS logo
+ 'PlayStation.' wordmark) from data/ps1_templates/ICON0.PNG.
- PIC0 (310x180): a PSN-style info board drawn in code — title, IGDB
description, ESRB badge (from IGDB age_ratings) and PS3/PSP badges.
- PIC1 (480x272): the bundled launch background template.
The converter now embeds PIC0, the PS1 tab previews all three images, and
ps1_art pulls IGDB description/ESRB as best effort. Templates are git-ignored
(user-supplied, like base.PBP) with a drawn-art fallback when missing.
Selecting a pending disc in the PS1 tab now shows a live preview of the
ICON0 (144x80 XMB icon) and PIC1 (480x272 launch background) that the
converter would embed, fetched asynchronously so the UI stays responsive.
Converted discs/EBOOTs show an 'already converted' notice, and ps1_art now
falls back to a name-derived cache key when a disc has no serial.
Fetch the game's cover art (libretro / ScreenScraper / IGDB / Wikipedia,
reusing the local cover cache) and bake it into the EBOOT's ICON0 (144x80
XMB icon) and PIC1 (480x272 launch background) instead of the default PS1
icon. Best-effort: falls back to the base icon/empty background when no art
is found. convert()/convert_to_folder() gain optional icon0/pic1 params.
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