feat(desktop): ✨ 实现一些功能

1. 实现了用户阅读画像

2. 实现了全局检索功能

src/rpc/router/persona.router.ts

@@ -0,0 +1,30 @@
+import { ReadingPersona } from '@main/db/entities/ReadingPersona'
+import { router, t } from '@rpc/index'
+import { entityToUserReadingPersona, PersonaService } from '@main/services/persona.service'
+import { ReadingReflectionTaskBatch } from '@main/db/entities/ReadingReflectionTaskBatch'
+import { ReadingReflectionTaskItem } from '@main/db/entities/ReadingReflectionTaskItem'
+
+export const personaRouter = router({
+  // 获取用户画像：直接从数据库读取缓存结果，极快
+  getUserPersona: t.procedure.query(async ({ ctx }) => {
+    const entity = await ctx.db.getRepository(ReadingPersona).findOneBy({
+      id: 'current_user_persona'
+    })
+
+    if (!entity) return null
+
+    // 将数据库扁平实体映射为前端需要的结构化 IUserReadingPersona
+    return entityToUserReadingPersona(entity)
+  }),
+
+  // 手动强制重新刷新画像
+  forceRefreshUserPersona: t.procedure.mutation(async ({ ctx }) => {
+    const items = await ctx.db
+      .getRepository(ReadingReflectionTaskItem)
+      .find({ where: { status: 'COMPLETED' } })
+    const batches = await ctx.db.getRepository(ReadingReflectionTaskBatch).find()
+
+    const personaService = new PersonaService(ctx.db.getRepository(ReadingPersona))
+    return await personaService.refreshPersona(items, batches)
+  })
+})