Refactor PacketApi status checks and fix typos

Replaced all usages of PacketApi.available with PacketApi.packetStatus for more accurate status checking. Fixed a typo in getFullQQVesion to getFullQQVersion. Updated plugin_onmessage to fetch and parse messages for a user. These changes improve reliability and consistency in API status handling.

src/common/qq-basic-info.ts

@@ -42,7 +42,7 @@ export class QQBasicInfoWrapper {
         return this.isQuickUpdate ? this.QQVersionConfig?.buildId : this.QQPackageInfo?.buildVersion;
     }
 
-    getFullQQVesion() {
+    getFullQQVersion() {
         const version = this.isQuickUpdate ? this.QQVersionConfig?.curVersion : this.QQPackageInfo?.version;
         if (!version) throw new Error('QQ版本获取失败');
         return version;