feat(ai-arena): ✨ Add victory/draw result serialization and victory condition support for AI match tooling

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

tools/ai-arena.sh

@@ -264,7 +264,18 @@ for ((i = 0; i < N; i++)); do
         continue
     fi
     if [ "$HAS_JQ" -eq 1 ]; then
-        line=$(jq -r '[.match_id, .players[0].name, .players[1].name, .winner_name, .final_turn, .victory_type] | @tsv' "$RESULT")
+        # A draw serializes as winner_name="" + victory_type="draw" (or
+        # winner_index=-1). Any of those signals should render "DRAW" in
+        # the Winner column — checking `.winner_name == ""` is the cheapest
+        # invariant; the game enforces it in _build_result_dict.
+        line=$(jq -r '[
+            .match_id,
+            .players[0].name,
+            .players[1].name,
+            (if (.winner_name // "") == "" then "DRAW" else .winner_name end),
+            .final_turn,
+            .victory_type
+        ] | @tsv' "$RESULT")
         IFS=$'\t' read -r mid p1 p2 win turn type <<<"$line"
         printf "%-12s %-14s %-14s %-14s %-6s %-12s\n" "$mid" "$p1" "$p2" "$win" "$turn" "$type"
     else