Show Wikipedia article extract on Flickr search results page

Fetches the introductory paragraph from the Wikipedia API so users
can see what/who they're looking for when browsing Flickr search results.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

main.py

@@ -386,6 +386,28 @@ def has_content_image(images: list[dict]) -> bool:
     return False
 
 
+def get_wikipedia_extract(title: str) -> str:
+    """Get the first paragraph extract of a Wikipedia article."""
+    params = {
+        "action": "query",
+        "prop": "extracts",
+        "exintro": "true",
+        "explaintext": "true",
+        "titles": title,
+        "format": "json",
+    }
+    headers = {"User-Agent": WIKIMEDIA_USER_AGENT}
+    try:
+        r = requests.get(WIKIPEDIA_API, params=params, headers=headers)
+        data = r.json()
+        pages = data.get("query", {}).get("pages", {})
+        for page in pages.values():
+            return page.get("extract", "")
+    except Exception:
+        pass
+    return ""
+
+
 def get_articles_without_images(
     category: str,
     limit: int = 200,
@@ -730,6 +752,8 @@ def start() -> str:
                 flickr_search = f'"{without_middle}"'
                 search_result = search_flickr(flickr_search, page)
 
+        wikipedia_extract = get_wikipedia_extract(wiki_part2)
+
         return flask.render_template(
             "combined.html",
             name=name,
@@ -737,6 +761,7 @@ def start() -> str:
             search_result=search_result,
             cat=cat,
             flickr_search=flickr_search,
+            wikipedia_extract=wikipedia_extract,
         )
 
     if "/in/" in flickr_url: