diff --git a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/ocr/ZipExtractor.java b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/ocr/ZipExtractor.java
index 009d87d..fa1ccfe 100644
--- a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/ocr/ZipExtractor.java
+++ b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/ocr/ZipExtractor.java
@@ -8,6 +8,7 @@ import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.nio.charset.Charset;
+import java.nio.charset.MalformedInputException;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
@@ -42,12 +43,13 @@ public class ZipExtractor
             log.info("zip 下载: url={} size={}B tmp={}", zipUrl, size, zipFile.getAbsolutePath());
 
             // 优先 UTF-8 解包; 若 entry 名非 UTF-8 (常见 GBK, Windows 打包) 会抛
-            // IllegalArgumentException (malformed input) → 回退 GBK 重试
+            // MalformedInputException (IOException 子类, 不是 IllegalArgumentException)
+            // → 回退 GBK 重试
             try
             {
                 return doExtract(zipFile, tmpRoot, StandardCharsets.UTF_8);
             }
-            catch (IllegalArgumentException e)
+            catch (IllegalArgumentException | MalformedInputException e)
             {
                 log.warn("zip 文件名非 UTF-8, 回退 GBK 重试: {}", e.getMessage());
                 return doExtract(zipFile, tmpRoot, Charset.forName("GBK"));
diff --git a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingAttendeeServiceImpl.java b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingAttendeeServiceImpl.java
index fa2dbfe..e580e9e 100644
--- a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingAttendeeServiceImpl.java
+++ b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingAttendeeServiceImpl.java
@@ -7,6 +7,7 @@ import java.io.InputStream;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.nio.charset.Charset;
+import java.nio.charset.MalformedInputException;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
@@ -994,7 +995,9 @@ public class BizMeetingAttendeeServiceImpl implements IBizMeetingAttendeeService
     private LinkedHashMap<String, ZipFolder> parseAttendeeZip(byte[] zipBytes) throws IOException {
         try {
             return readAttendeeZip(zipBytes, StandardCharsets.UTF_8);
-        } catch (IllegalArgumentException e) {
+        } catch (IllegalArgumentException | MalformedInputException e) {
+            // 注: ZipInputStream 用错 charset 解码 entry name 抛 MalformedInputException (IOException 子类),
+            //     旧 catch (IllegalArgumentException) 漏掉, GBK 回退永远是死代码
             log.warn("[attendee] zip UTF-8 解析失败, 回退 GBK: {}", e.getMessage());
             return readAttendeeZip(zipBytes, Charset.forName("GBK"));
         }
diff --git a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingMaterialServiceImpl.java b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingMaterialServiceImpl.java
index 11d20cb..690d7c2 100644
--- a/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingMaterialServiceImpl.java
+++ b/ry-api/ruoyi-business/src/main/java/com/ruoyi/business/service/impl/BizMeetingMaterialServiceImpl.java
@@ -18,6 +18,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.Charset;
+import java.nio.charset.MalformedInputException;
 import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.UUID;
@@ -841,8 +842,10 @@ public class BizMeetingMaterialServiceImpl implements IBizMeetingMaterialService
         Map<String, List<String>> folderNames = new HashMap<>();
         try {
             readServiceZip(zipBytes, StandardCharsets.UTF_8, folderBytes, folderNames);
-        } catch (IllegalArgumentException e) {
+        } catch (IllegalArgumentException | MalformedInputException e) {
             // 中文 Windows 打包器 (WinRAR/资源管理器) 用 GBK 编码条目名且不置 UTF-8 标志, 回退 GBK 重解析
+            // 注: ZipInputStream 用错 charset 解码 entry name 抛的是 MalformedInputException (IOException 子类),
+            //     不是 IllegalArgumentException, 旧 catch 漏掉导致 fallback 永远不会跑
             log.warn("[material] 会务材料 zip UTF-8 解析失败, 回退 GBK: {}", e.getMessage());
             folderBytes.clear();
             folderNames.clear();
diff --git a/ry-vue3/src/views/doctor/MeetingInvitation.vue b/ry-vue3/src/views/doctor/MeetingInvitation.vue
index f764f92..ba76b43 100644
--- a/ry-vue3/src/views/doctor/MeetingInvitation.vue
+++ b/ry-vue3/src/views/doctor/MeetingInvitation.vue
@@ -4,7 +4,7 @@
     <div class="breadcrumb">首页 / 会议邀请函</div>
 
     <!-- 称谓 -->
-      <p class="salutation">尊敬的 {{ attendeeName || '专家' }}：</p>
+      <p class="salutation">尊敬的 {{ attendeeName || '专家' }} 教授：</p>
 
       <!-- 正文 -->
       <p class="body-text">
diff --git a/ry-vue3/src/views/meetings/MeetingDetail.vue b/ry-vue3/src/views/meetings/MeetingDetail.vue
index f0c776a..2be43fc 100644
--- a/ry-vue3/src/views/meetings/MeetingDetail.vue
+++ b/ry-vue3/src/views/meetings/MeetingDetail.vue
@@ -1320,6 +1320,10 @@ function onBatchEsign() {
 /** 调后端邀请参会 (推"会议邀请"站内信 + 置 is_invited=1, 不发短信); loadingId 非空→单条行级 loading, 否则批量工具栏 loading */
 async function pushInvite(ids, loadingId) {
   if (!ids || !ids.length) return
+  if (!row.value.posterUrl) {
+    ElMessage.warning('该会议未上传日程海报，不允许发送邀请。请先上传海报后再发送。')
+    return
+  }
   if (loadingId != null) inviteLoadingId.value = loadingId
   else inviteSending.value = true
   try {