feat: 新增NPC与外交逻辑，优化UI组件结构

重构并精简了部分UI组件，移除冗余弹窗与详情组件，新增NPC相关逻辑（npcBehaviorLogic、npcGrowthLogic、npcStore等）及外交逻辑（diplomaticLogic、DiplomacyView）。完善分页、标签、复选框等通用UI组件。优化战报弹窗，调整README下载链接为相对路径，修复部分国际化内容。

src/stores/npcStore.ts

@@ -0,0 +1,23 @@
+import { defineStore } from 'pinia'
+import type { NPC } from '@/types/game'
+import pkg from '../../package.json'
+import { encryptData, decryptData } from '@/utils/crypto'
+
+/**
+ * NPC Store
+ * 存储和管理所有NPC数据
+ */
+export const useNPCStore = defineStore('npc', {
+  state: () => ({
+    npcs: [] as NPC[],
+    lastGrowthCheck: {} as Record<string, number> // npcId -> timestamp
+  }),
+  persist: {
+    key: `${pkg.name}-npcs`,
+    storage: localStorage,
+    serializer: {
+      serialize: state => encryptData(state),
+      deserialize: value => decryptData(value)
+    }
+  }
+})