Add By Runner tab to summaries section in all templates

Extract runner field from Lutris database and display playtime
grouped by runner (wine, linux, steam, dosbox, etc.) in a new
third tab alongside Top Games and By Category.

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

generate_report.py

@@ -49,7 +49,7 @@ def get_all_games(db_path: str) -> tuple[list[dict], int]:
     total_library = cursor.fetchone()[0]
 
     cursor.execute("""
-        SELECT id, name, playtime, COALESCE(service, 'local') as service
+        SELECT id, name, playtime, COALESCE(service, 'local') as service, COALESCE(runner, 'unknown') as runner
         FROM games
         WHERE playtime > 0
         ORDER BY playtime DESC
@@ -75,6 +75,7 @@ def get_all_games(db_path: str) -> tuple[list[dict], int]:
             "name": row[1],
             "playtime": row[2],
             "service": row[3],
+            "runner": row[4],
             "categories": game_categories.get(row[0], [])
         }
         for row in games_rows