feat: 优化 Windows 缓存加载和图片显示

src/preload/index.d.ts

@@ -37,9 +37,24 @@ declare global {
       initDb: (
         key: string
       ) => Promise<boolean | { success: boolean; error?: string; monitoring?: boolean }>
+      getBootstrapCache: () => Promise<{
+        self?: { wxid: string; nickname: string; avatar?: string; accountRoot: string }
+        contacts: Contact[]
+        updatedAt: number
+      } | null>
       getContacts: (filter?: string) => Promise<Contact[]>
       getContactAvatars: (usernames: string[]) => Promise<Record<string, string>>
-      getMessages: (userMd5: string, startTime?: number, endTime?: number) => Promise<Message[]>
+      getCachedMessages: (
+        userMd5: string,
+        startTime?: number,
+        endTime?: number
+      ) => Promise<Message[]>
+      getMessages: (
+        userMd5: string,
+        startTime?: number,
+        endTime?: number,
+        options?: { limit?: number }
+      ) => Promise<Message[]>
       getGroupSnapshot: (userMd5: string) => Promise<{
         roomId: string
         memberCount: number

src/preload/index.ts

@@ -5,10 +5,17 @@ import { GroupReportExportRequest } from '../shared/group-report'
 // 渲染器的自定义 API
 const api = {
   initDb: (key: string) => ipcRenderer.invoke('db:init', key),
+  getBootstrapCache: () => ipcRenderer.invoke('db:getBootstrapCache'),
   getContacts: (filter?: string) => ipcRenderer.invoke('db:getContacts', filter),
   getContactAvatars: (usernames: string[]) => ipcRenderer.invoke('db:getContactAvatars', usernames),
-  getMessages: (userMd5: string, startTime?: number, endTime?: number) =>
-    ipcRenderer.invoke('db:getMessages', userMd5, startTime, endTime),
+  getCachedMessages: (userMd5: string, startTime?: number, endTime?: number) =>
+    ipcRenderer.invoke('db:getCachedMessages', userMd5, startTime, endTime),
+  getMessages: (
+    userMd5: string,
+    startTime?: number,
+    endTime?: number,
+    options?: { limit?: number }
+  ) => ipcRenderer.invoke('db:getMessages', userMd5, startTime, endTime, options),
   getGroupSnapshot: (userMd5: string) => ipcRenderer.invoke('db:getGroupSnapshot', userMd5),
   search: (keyword: string) => ipcRenderer.invoke('db:search', keyword),
   aiChat: (