fix: No sources for sub!

[Simon-J-Hloska]

Type of change

• Bug fix
• Feature
• Documentation update

Description

Small follow-up update:

MegaPlay was returning subtitle tracks correctly in the tracks array, but my initial parser was too strict about the JSON formatting and could leave sub_link empty.

I updated the extraction logic to parse individual caption track objects more robustly and now prefer:

1. English subtitles
2. the provider's default caption track
3. the first available caption track

Subtitles are now being picked up correctly alongside the MegaPlay HLS source.

Re-ran shfmt, shellcheck, and the local playback tests after the change.

Checklist

• any anime playing
• [ x] bumped version

---

• [ x] next, prev, replay and select work
• [ x] -c history and continue work
• [ x] -d downloads work
• [ x] -e (select episode) aka -r (range selection) works
• [ x] -S select index works
• [ x] -q quality works
• [ x] -s syncplay works
• [ x] -v vlc works
• [ x] --dub and regular (sub) mode both work
• [ x] --nextep-countdown countdown to next ep works

---

• [ x] -h help info is up to date
• [ x] Readme is up to date
• [ x] Man page is up to date

Additional Testcases

(these don't block a merge)

• --skip ani-skip works
• --no-detach no detach works
• --exit-after-play auto exit after playing works

Copy Pasta

./ani-cli -V
./ani-cli -S 1 -e 1 -d flcl
./ani-cli -S 1 -e 1 -q worst -v flcl
./ani-cli -c -s --dub

[port19x]

Seems to be fixed rn, but feel free to keep open for a couple more days in case the issues return

[port19x]

closing in favor of #1941