Move search results into poster grid

app.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 import base64
+import hashlib
 import gzip
 import json
 import mimetypes
@@ -146,6 +147,12 @@ def cover_route(show_id):
     return f"/api/watchlist/thumb/{quote(str(show_id).strip(), safe='')}"
 
 
+def search_thumbnail_cache_key(title):
+    normalized = normalize_title_key(title) or str(title or "").strip().casefold()
+    digest = hashlib.sha1(normalized.encode("utf-8")).hexdigest()[:12]
+    return f"search-{digest}"
+
+
 def anime_source_url(show_id, title):
     normalized_show_id = str(show_id or "").strip()
     if not normalized_show_id:
@@ -774,6 +781,32 @@ def fetch_anidb_cover_by_aid(aid, fallback_title=""):
     }
 
 
+def resolve_search_thumbnail(title):
+    clean_title = str(title or "").strip()
+    if not clean_title:
+        raise ValueError("Missing title for thumbnail lookup")
+    cache_key = search_thumbnail_cache_key(clean_title)
+    THUMBNAIL_ROOT.mkdir(parents=True, exist_ok=True)
+    for existing in THUMBNAIL_ROOT.glob(f"{cache_key}.*"):
+        if existing.is_file():
+            return existing
+    cover = None
+    last_error = None
+    for resolver in (fetch_animeschedule_cover, fetch_anidb_cover):
+        try:
+            cover = resolver(clean_title)
+            break
+        except Exception as exc:
+            last_error = exc
+    if not cover:
+        raise RuntimeError("Could not find a thumbnail for this search result") from last_error
+    cached_name = cache_thumbnail_image(cache_key, cover["url"])
+    path = thumbnail_file_path(cached_name)
+    if not path or not path.exists():
+        raise RuntimeError("Could not cache the search thumbnail")
+    return path
+
+
 def cache_thumbnail_image(show_id, image_url):
     THUMBNAIL_ROOT.mkdir(parents=True, exist_ok=True)
     debug_log("thumbnail.download.request", show_id=show_id, image_url=image_url)
@@ -2816,6 +2849,7 @@ Handler = build_handler_class(
         runtime_state=runtime_state,
         save_runtime_config=save_runtime_config,
         search_anime=search_anime,
+        resolve_search_thumbnail=resolve_search_thumbnail,
         test_discord_webhook_config=test_discord_webhook_config,
         thumbnail_file_path=thumbnail_file_path,
         update_all_watchlist_statuses=update_all_watchlist_statuses,