feat: 优化游戏体验和系统平衡性

- 修复商店物品名称显示问题，添加堆叠物品出售数量选择
- 自动战斗状态持久化，战斗结束显示"寻找中"状态
- 战斗日志显示经验获取详情（战斗经验、武器经验）
- 技能进度条显示当前/最大经验值
- 阅读自动解锁技能并持续获得阅读经验，背包可直接阅读
- 优化训练平衡：时长60秒，经验5点/秒，耐力消耗降低
- 实现自然回复系统：基于体质回复HP/耐力，休息提供3倍加成
- 战斗和训练时不进行自然回复

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

components/drawers/InventoryDrawer.vue

@@ -55,6 +55,12 @@
           type="warning"
           @click="unequipItem"
         />
+        <TextButton
+          v-if="canRead"
+          text="阅读"
+          type="primary"
+          @click="readItem"
+        />
         <TextButton
           v-if="canUse"
           text="使用"
@@ -75,6 +81,7 @@ import { ref, computed } from 'vue'
 import { usePlayerStore } from '@/store/player'
 import { useGameStore } from '@/store/game'
 import { equipItem as equipItemUtil, unequipItemBySlot, useItem as useItemUtil } from '@/utils/itemSystem.js'
+import { startTask } from '@/utils/taskSystem.js'
 import FilterTabs from '@/components/common/FilterTabs.vue'
 import TextButton from '@/components/common/TextButton.vue'
 
@@ -112,6 +119,11 @@ const canUse = computed(() => {
   return selectedItem.value.type === 'consumable'
 })
 
+const canRead = computed(() => {
+  if (!selectedItem.value) return false
+  return selectedItem.value.type === 'book'
+})
+
 // 装备槽位映射
 const slotMap = {
   weapon: 'weapon',
@@ -163,11 +175,34 @@ function useItem() {
   if (!selectedItem.value) return
   const result = useItemUtil(player, game, selectedItem.value.id, 1)
   if (result.success) {
-    // 如果阅读任务，可以在这里处理
     selectedItem.value = null
   }
 }
 
+function readItem() {
+  if (!selectedItem.value) return
+
+  // 检查是否已经在阅读中
+  const existingTask = game.activeTasks?.find(t => t.type === 'reading')
+  if (existingTask) {
+    game.addLog('已经在阅读其他书籍了', 'error')
+    return
+  }
+
+  const result = startTask(game, player, 'reading', {
+    itemId: selectedItem.value.id,
+    duration: selectedItem.value.readingTime || 60
+  })
+
+  if (result.success) {
+    game.addLog(`开始阅读《${selectedItem.value.name}》`, 'info')
+    selectedItem.value = null
+    emit('close')  // 关闭背包以便看到阅读进度
+  } else {
+    game.addLog(result.message, 'error')
+  }
+}
+
 function sellItem() {
   if (!selectedItem.value) return
   // 已装备的物品不能出售
@@ -256,13 +291,6 @@ function sellItem() {
     font-size: 22rpx;
     margin-top: 4rpx;
   }
-}
-
-.quality-badge {
-  font-size: 18rpx;
-  opacity: 0.8;
-  margin-left: 8rpx;
-}
 
   &__equipped-badge {
     width: 32rpx;
@@ -278,6 +306,12 @@ function sellItem() {
   }
 }
 
+.quality-badge {
+  font-size: 18rpx;
+  opacity: 0.8;
+  margin-left: 8rpx;
+}
+
 .inventory-empty {
   padding: 80rpx;
   text-align: center;