[前端+RAG] 修复：异步上传+MySQL回写导读；PDF切换detached(Uint8Array复制)；对话工具栏遮挡；阅读模式空白

chat_web_front/src/components/ReadingCreate.vue

@@ -434,7 +434,7 @@ const handleStop = async () => {
 
 <style lang="less" scoped>
 .message-content {
-  height: calc(100% - 255px);
+  height: calc(100% - 290px);
   overflow-y: auto;
   padding: 20px;
 
@@ -456,12 +456,9 @@ const handleStop = async () => {
 .tool-bar {
   display: flex;
   justify-content: space-between;
-  width: calc(100% - 15px);
-  padding-top: 30px;
-  height: 65px;
-  position:absolute;
-  bottom:275px;
-  background: linear-gradient( 360deg, #C0D4FD 0%, rgba(199,219,255,0) 100%);
+  width: 100%;
+  padding-top: 8px;
+  height: 40px;
   .label {
     display: flex;
     justify-content: space-around;