Statistiky: dokoncene hry rozdelene na s ludmi / s botmi

Karta "Dokoncene hry" (%) nahradena dvomi poctami dokoncenych hier
podla toho, ci na niektorom sedadle sedel bot (username "bot:...").
Zaroven oprava serializacie avg_game_duration_minutes -- Postgres
vracia z func.avg Decimal, ktory json.dumps nevie serializovat (500
na /api/admin/stats).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

api/stats.py

@@ -8,12 +8,16 @@ import os
 
 import geoip2.database
 import geoip2.errors
-from sqlalchemy import extract, func, select
+from sqlalchemy import extract, func, or_, select
 from user_agents import parse as parse_ua
 
 from db.db import async_session
 from db.models import Game, Guess, PageView, Player
 
+# Konvencia na rozpoznanie botieho uctu (viz api.bots.BOT_PREFIX) -- drzana tu
+# lokalne, aby sa do statistickej cesty netahala rl vrstva (siet/numpy).
+_BOT_PREFIX = "bot:"
+
 _geoip_reader: "geoip2.database.Reader | None" = None
 _geoip_load_attempted = False
 
@@ -216,8 +220,24 @@ async def get_daily_stats(logged_in_only: bool = False) -> dict:
             )
         ).all()
 
-        total, finished = (
-            await session.execute(select(func.count(), func.count(Game.ended_at)))
+        # Dokoncene hry rozdelene podla toho, ci na niektorom zo 4 sedadiel sedel
+        # bot (ucet s username "bot:..."). has_bot je pravdive, ak aspon jedno
+        # sedadlo patri botiemu uctu.
+        bot_ids = select(Player.id).where(Player.username.like(f"{_BOT_PREFIX}%"))
+        has_bot = or_(
+            Game.player0_id.in_(bot_ids),
+            Game.player1_id.in_(bot_ids),
+            Game.player2_id.in_(bot_ids),
+            Game.player3_id.in_(bot_ids),
+        )
+        finished = Game.ended_at.is_not(None)
+        finished_bot_games, finished_human_games = (
+            await session.execute(
+                select(
+                    func.count().filter(finished & has_bot),
+                    func.count().filter(finished & ~has_bot),
+                )
+            )
         ).one()
 
         avg_duration = (
@@ -328,8 +348,9 @@ async def get_daily_stats(logged_in_only: bool = False) -> dict:
     return {
         "games_per_day": {str(r.day): r.n for r in game_rows},
         "players_per_day": {str(r.day): r.n for r in player_rows},
-        "completion_rate": finished / total if total else None,
-        "avg_game_duration_minutes": (avg_duration / 60) if avg_duration else None,
+        "finished_bot_games": finished_bot_games,
+        "finished_human_games": finished_human_games,
+        "avg_game_duration_minutes": (float(avg_duration) / 60) if avg_duration else None,
         "total_players": total_players,
         "unconfirmed_players": unconfirmed_players,
         "peak_hours": {int(r.h): r.n for r in peak_hours},