feat(live-state): expose sliced recents + total count to template

Drop .limit(20) from the recent_rows query so the full history window is
available for the future recent-players modal; derive recent_players_overview
(first 10) and recent_players_total_count from the unbounded result and pass
both into _live_state.html alongside the existing recent_players key.

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

l4d2web/l4d2web/routes/server_routes.py

@@ -260,9 +260,11 @@ def live_state_fragment(server_id: int) -> Response:
                 ServerPlayerSession.name_at_join,
             )
             .order_by(func.max(ServerPlayerSession.left_at).desc())
-            .limit(20)
         ).all()
 
+    recent_total = len(recent_rows)
+    recent_overview = recent_rows[:10]
+
     return render_template(
         "_live_state.html",
         server=server,
@@ -270,5 +272,7 @@ def live_state_fragment(server_id: int) -> Response:
         snapshot_fresh=(latest is not None and latest.last_seen_at >= cutoff),
         current_players=current_rows,
         recent_players=recent_rows,
+        recent_players_overview=recent_overview,
+        recent_players_total_count=recent_total,
         poll_seconds=max(1, int(current_app.config.get("LIVE_STATE_POLL_SECONDS", 5))),
     )

l4d2web/tests/test_status_and_server_logs.py

@@ -71,3 +71,39 @@ def test_status_precedence() -> None:
     from l4d2web.services.status import compute_display_state
 
     assert compute_display_state("start", "stopped") == "starting"
+
+
+@pytest.mark.xfail(reason="template change in Task 3 will satisfy this", strict=True)
+def test_live_state_exposes_recent_overview_and_total_count(owner_client_with_server) -> None:
+    """Route must expose recent_players_overview (≤10) and recent_players_total_count.
+
+    The body-text assertions depend on the template change in Task 3.
+    The xfail marker will be removed once Task 3 lands.
+    """
+    from datetime import timedelta
+    from l4d2web.models import ServerPlayerSession
+
+    client, server_id = owner_client_with_server
+
+    now = datetime.now(UTC)
+    total = 13
+
+    with session_scope() as db:
+        for i in range(total):
+            db.add(ServerPlayerSession(
+                server_id=server_id,
+                steam_id_64=str(76561190000000000 + i),
+                joined_at=now - timedelta(hours=i + 2),
+                left_at=now - timedelta(hours=i + 1),
+                name_at_join=f"Player{i}",
+                min_ping=10,
+                max_ping=50,
+            ))
+
+    res = client.get(f"/servers/{server_id}/live-state")
+    assert res.status_code == 200
+    html = res.get_data(as_text=True)
+
+    # These assertions depend on the Task 3 template changes.
+    assert "13 Recent" in html
+    assert html.count("recent-chip") <= 10