refactor: 移除未使用的代码并优化卡牌获取逻辑

- 删除 MissionCardComp 中未使用的接口定义和注释代码
- 移除 MissionComp 中未实现的英雄死亡、升级和复活相关事件处理
- 重构 CardSet 中的 getCardPoolByLv 和 getCardsByLv 方法，增加类型过滤和等级模式参数
- 清理 MissionComp 中的冗余代码和注释，简化局内数据初始化逻辑

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

@@ -146,15 +146,36 @@ const pickCards = (cards: CardConfig[], count: number): CardConfig[] => {
     return selected
 }
 
-/** 获取指定等级可出现的基础卡池（英雄+技能） */
-export const getCardPoolByLv = (lv: number): CardConfig[] => {
+/** 获取指定等级可出现的基础卡池 */
+export const getCardPoolByLv = (lv: number, onlyCurrentLv: boolean = false): CardConfig[] => {
     const cardLv = clampCardLv(lv)
+    if (onlyCurrentLv) {
+        return CardPoolList.filter(card => card.lv === cardLv)
+    }
     return CardPoolList.filter(card => card.lv <= cardLv)
 }
 
-/** 常规发牌：前 2 英雄 + 后 2 其他 */
-export const getCardsByLv = (lv: number): CardConfig[] => {
-    const pool = getCardPoolByLv(lv)
+const normalizeTypeFilter = (type: CardType | CardType[]): Set<CardType> => {
+    const list = Array.isArray(type) ? type : [type]
+    const hasBuffLike = list.includes(CardType.Buff) || list.includes(CardType.Debuff)
+    if (hasBuffLike) {
+        return new Set<CardType>([...list, CardType.Buff, CardType.Debuff])
+    }
+    return new Set<CardType>(list)
+}
+
+/** 常规发牌：前 2 英雄 + 后 2 其他；支持按类型和等级模式过滤 */
+export const getCardsByLv = (
+    lv: number,
+    type?: CardType | CardType[],
+    onlyCurrentLv: boolean = false
+): CardConfig[] => {
+    const pool = getCardPoolByLv(lv, onlyCurrentLv)
+    if (type !== undefined) {
+        const typeSet = normalizeTypeFilter(type)
+        const filteredPool = pool.filter(card => typeSet.has(card.type))
+        return pickCards(filteredPool, 4)
+    }
     const heroPool = pool.filter(card => card.type === CardType.Hero)
     const otherPool = pool.filter(card => card.type !== CardType.Hero)
     const heroes = pickCards(heroPool, 2)

assets/script/game/common/config/CardSet.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.24",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "9bb78f05-447e-4b26-b2ec-4ac1341d390b",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}