feat(victory): add defeat reward gate by clear time and kill ratio

Defeat rewards now require surviving 15s and killing at least one
monster. Qualified defeats grant a fixed survive reward plus a
kill-ratio-scaled bonus; unqualified defeats yield nothing.
Victory rewards remain unchanged.

assets/script/game/common/config/GameSet.ts

@@ -240,4 +240,17 @@ export const VICTORY_REWARD_SET = {
     },
     /** 胜利加成系数（失败 1.0） */
     victory_multiplier: 1.2,
+    /**
+     * 失败奖励限制（不影响胜利）：
+     * 坚持 < defeat_time_threshold 秒或本节一只怪未杀 → 无任何奖励；
+     * 达标后 = 坚持奖励（固定）+ 击杀比例奖励（基数 × 本节击杀比例）
+     */
+    defeat: {
+        /** 坚持时间门槛（秒） */
+        time_threshold: 15,
+        /** 超门槛固定奖励（"超 15 秒奖励"） */
+        survive: { gold: 50, talent_exp: 10 },
+        /** 击杀比例奖励基数（本节怪物全灭时全额发放） */
+        kill: { gold: 150, talent_exp: 30 },
+    },
 };