修改名称，优化

miniprogram/pages/room/room.js

@@ -100,7 +100,7 @@ Page({
             wx.hideLoading()
 
             if (!res.result.success) {
-                wx.showModal({ title: '错误', content: res.result.msg, showCancel: false })
+                wx.showModal({ title: '提示', content: res.result.msg, showCancel: false })
                 return false
             }
 
@@ -247,7 +247,7 @@ Page({
 
     onShareAppMessage() {
         return {
-            title: '快来填位置，我们去找个中间点聚会！',
+            title: '点线得面 - 找到大家的聚会好去处！',
             path: `/pages/room/room?roomId=${this.data.roomId}`
         }
     },
@@ -431,9 +431,9 @@ Page({
     onEditRoomName() {
         wx.showModal({
             title: '修改聚会名称',
-            content: '请输入新的聚会名称',
+            content: this.data.roomName,
             editable: true,
-            placeholderText: this.data.roomName,
+            placeholderText: '请输入聚会名称',
             success: (res) => {
                 if (res.confirm && res.content.trim()) {
                     const newName = res.content.trim()