Season 0 (S00E##) not recognized as TV episodes in TVDB lookup

[wub-fur]

Subler correctly retrieves TV metadata from TheTVDB for standard episodes (e.g., S01E01), but fails when using Season 0 (S00E##), which TVDB uses for specials.

When a file is named with Season 0 (e.g., S00E01), Subler does not recognize it as a TV episode and instead treats it as a movie, resulting in no metadata match.

Since Subler is able to store Season 0 correctly once metadata is applied, this appears to be limited to the lookup/parsing stage rather than a limitation in how Season 0 is handled internally.

Steps to reproduce

1. Open a video file named with S00E## (e.g., S00E01)
2. Trigger metadata lookup (e.g., Shift-Command-M)
3. Subler does not identify the file as a TV episode and does not return a match from TVDB

Expected behavior

Season 0 should be treated as a valid TV season for lookup purposes, allowing specials to be matched automatically in the same way as other episodes.

Notes

TVDB uses Season 0 consistently for specials, so this case comes up frequently when tagging TV content.

[wub-fur]

This appears related to (or the same as) #103, but I’ve included clearer reproduction steps and description here.