Add genre tracking and year-in-review improvements

Adds genre field to Film model with TMDB enrichment. Genres populate from
TMDB detail fetch during add/edit and bulk enrichment. Genre metadata displays
on film cards, detail page (Production section), stats page (top genres panel),
and year-in-review (by decade and genre breakdowns).

Auto-detects rewatches when adding films via TMDB autocomplete - if a film with
the same TMDB ID already exists in diary, pre-fills rewatch checkbox and count.
Rewatch count now displays on film cards as "Rewatch #N".

Stats page now shows:
- Top genres (most watched)
- Film decades (sorted chronologically)
- Already shows: directors, companions, star distribution, rewatch rate

Year-in-review shows decades and genres alongside monthly activity and companions.

Bulk enrichment endpoint (/data/enrich-posters) now fetches missing genre
metadata along with posters and TMDB IDs.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/services/tmdb.py b/services/tmdb.py
index 3574f57..27f9f5b 100644
--- a/services/tmdb.py
+++ b/services/tmdb.py
@@ -46,6 +46,12 @@ def countries(movie: dict) -> str | None:
     return ", ".join(names) if names else None
 
 
+def genres(movie: dict) -> str | None:
+    names = [genre.get("name") for genre in movie.get("genres", [])]
+    names = [name for name in names if name]
+    return ", ".join(names) if names else None
+
+
 def languages(movie: dict) -> str | None:
     names = [
         language.get("english_name") or language.get("name")
@@ -115,6 +121,7 @@ def movie_payload(movie: dict, fallback: dict | None = None) -> dict:
         "release_date": release_date,
         "director": directors(movie),
         "country": countries(movie),
+        "genre": genres(movie),
         "language": languages(movie),
         "runtime": movie.get("runtime"),
         "overview": movie.get("overview") or fallback.get("overview"),
@@ -275,6 +282,7 @@ def apply_metadata_to_film(film, metadata: dict) -> bool:
         "director": metadata.get("director"),
         "year": metadata.get("year"),
         "country": metadata.get("country"),
+        "genre": metadata.get("genre"),
         "language": metadata.get("language"),
         "runtime": metadata.get("runtime"),
     }