[spadieri85]

Three small, independent fixes, one commit each so they can be cherry-picked or dropped separately.

Closes #175
Closes #176
Closes #177

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1. Read the config file with explicit UTF-8 encoding (common/settings.py)

open() without an encoding falls back to the system locale, so on Windows (cp1252) loading Unit3Dbot.json fails with UnicodeDecodeError. It is reached with the shipped default, because MY_TEXT_H contains ━ (U+2501). Writing already uses encoding="utf-8" in create_ban_list_file(), so this only makes the two read paths consistent.

2. Use CATEGORY_TV in the tv branch of _add_torrent_and_tag() (common/torrent_clients.py)

The tv branch assigned CATEGORY_MOVIE. To be precise about the severity: this block is normally unreachable, because the only caller (send_to_client()) passes a category already resolved by _get_category(), so the == 'tv' comparison does not match and no TV upload is misfiled in a default setup. It becomes a real bug only for users who set CATEGORY_TV to the literal string tv in their config.

The commit takes the conservative option — fix the constant, keep the block — but the block could equally well be deleted, since the value arrives already resolved. Happy to switch to that if you prefer.

3. Make the TVDB lookup optional instead of fatal (common/external_services/theMovieDB/core/api.py)

tvdb_search() built a TVDB client unconditionally — for movies too, and when TVDB_APIKEY is still the generated default "no_key". The resulting 401 aborted the whole run, and it did so after hashing had completed, discarding several minutes of work on large packs.

The lookup is now skipped when no key is configured, and any error degrades to None. The caller already handles a falsy result (if tvdb_result:), and uploads complete with the TMDB id alone — a series upload to a UNIT3D tracker is accepted without tvdb_id.

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Testing

• python -m py_compile on all three touched files.
• Fix 1 and fix 3 verified in real use: the equivalent patch has been running in a headless Docker deployment without a TVDB key, where both a season-pack upload and several movie dry-runs complete instead of crashing.
• Fix 2 is verified by inspection only, and is a latent fix rather than an observed failure — see the note above and Unreachable category remapping in _add_torrent_and_tag maps 'tv' to CATEGORY_MOVIE #176.