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, 19 insertions, 1 deletions

diff --git a/routers/tmdb.py b/routers/tmdb.py
index 5f7943f..f56a9df 100644
--- a/routers/tmdb.py
+++ b/routers/tmdb.py
@@ -3,7 +3,7 @@ from dotenv import load_dotenv
 from fastapi import APIRouter, Query
 from fastapi.responses import JSONResponse
 
-from services.tmdb import TMDBNotConfiguredError, search_movies, movie_images
+from services.tmdb import TMDBNotConfiguredError, search_movies, movie_images, movie_detail, movie_payload
 
 load_dotenv()
 
@@ -32,6 +32,24 @@ async def search_tmdb(q: str = Query(..., min_length=2)):
         )
 
 
+@router.get("/detail/{tmdb_id}")
+async def tmdb_detail(tmdb_id: int):
+    try:
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            detail = await movie_detail(client, tmdb_id)
+        return movie_payload(detail)
+    except TMDBNotConfiguredError:
+        return JSONResponse(
+            status_code=503,
+            content={"error": "TMDB_API_KEY is not configured."},
+        )
+    except httpx.HTTPError:
+        return JSONResponse(
+            status_code=502,
+            content={"error": "Failed to fetch TMDB details."},
+        )
+
+
 @router.get("/posters")
 async def tmdb_posters(tmdb_id: int = Query(...)):
     try: