代码优化，变量名称调整

utils/im/models.js

@@ -2,8 +2,8 @@ import {
     usqlite
 } from '@/uni_modules/onemue-USQLite/js_sdk/usqlite.js'
 
-const friendModel = usqlite.model('friends', {
-    userId: {
+const contactModel = usqlite.model('contacts', {
+    targetId: {
         type: String,
         primaryKey: true,
         unique: true
@@ -15,8 +15,8 @@ const friendModel = usqlite.model('friends', {
     },
     portraitUrl: String,
     localAvatar: String
-})
+})
 
 export default {
-    friendModel
+    contactModel
 }