Fix TheTVDB matching for 04x01 filenames and add all-seasons mode.

Parse NxNN and SxxExx layouts, match across every season when season is 0, and rewrite season plus episode numbers.

Co-authored-by: Cursor <[email protected]>

engine/rules.py

@@ -9,7 +9,7 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import List, Optional
 
-from .episode_match import rewrite_episode_number
+from .episode_match import rewrite_episode_stem, EpisodeTarget, _coerce_target, parse_episode_stem
 
 
 @dataclass
@@ -279,12 +279,16 @@ class TvdbEpisodeRenumberRule(Rule):
     ) -> tuple[str, str]:
         if not self.episode_mapping or original_name is None:
             return stem, ext
-        new_ep = self.episode_mapping.get(original_name)
-        if new_ep is None:
+        target_raw = self.episode_mapping.get(original_name)
+        if target_raw is None:
             return stem, ext
-        new_stem = rewrite_episode_number(
+        parsed = parse_episode_stem(stem, self.pattern)
+        if not parsed:
+            return stem, ext
+        target = _coerce_target(target_raw, parsed)
+        new_stem = rewrite_episode_stem(
             stem,
-            int(new_ep),
+            target,
             padding=self.padding,
             pattern=self.pattern,
         )