修改了历史回答导出pdf的bug，让表格数据能完全展示

chat-client/src/views/chatweb/historicalRecords/components/details.vue

@@ -173,28 +173,70 @@
         // 保存原始样式
         const originalMaxHeight = timelineContainer.value.style.maxHeight
         const originalOverflow = timelineContainer.value.style.overflow
+        const originalTableStyles: { table: HTMLElement; styles: Record<string, string> }[] = []
 
-        // 展开所有内容
+        // 展开所有思考内容
+        Object.keys(state.showThinking).forEach(k => (state.showThinking[k] = true))
         timelineContainer.value.style.maxHeight = 'none'
         timelineContainer.value.style.overflow = 'visible'
-        Object.keys(state.showThinking).forEach(k => state.showThinking[k] = true)
+
+        // ===== ✅ 临时修改表格样式（完全展开宽度、不压缩） =====
+        const tables = timelineContainer.value.querySelectorAll('table')
+        tables.forEach((table: HTMLElement) => {
+          const computed = window.getComputedStyle(table)
+          originalTableStyles.push({
+            table,
+            styles: {
+              maxWidth: table.style.maxWidth,
+              width: table.style.width,
+              display: table.style.display,
+              overflowX: table.style.overflowX,
+              whiteSpace: table.style.whiteSpace,
+              tableLayout: table.style.tableLayout,
+            },
+          })
+
+          // 解除所有限制
+          table.style.maxWidth = 'none'
+          table.style.width = 'auto'
+          table.style.display = 'table'
+          table.style.overflowX = 'visible'
+          table.style.whiteSpace = 'nowrap'
+          table.style.tableLayout = 'auto'
+
+          // 同步列单元格样式
+          const cells = table.querySelectorAll('th, td')
+          cells.forEach((cell: HTMLElement) => {
+            cell.style.whiteSpace = 'nowrap'
+            cell.style.wordBreak = 'keep-all'
+            cell.style.textOverflow = 'clip'
+          })
+        })
 
         await nextTick()
-        await new Promise(resolve => setTimeout(resolve, 50)) // 等待渲染
+        await new Promise(resolve => setTimeout(resolve, 100)) // 等待渲染完成
 
+        // 获取真实尺寸（包含展开的表格）
         const elementHeight = timelineContainer.value.scrollHeight
         const elementWidth = timelineContainer.value.scrollWidth
 
-        const opt : Html2PdfOptions = {
+        // 如果表格太宽，自动横向导出
+        const orientation = elementWidth > elementHeight ? 'landscape' : 'portrait'
+
+        const opt: Html2PdfOptions = {
           margin: 0.3,
           filename: `${props.conversationName}.pdf`,
           image: { type: 'jpeg', quality: 0.98 },
-          html2canvas: { scale: 2, scrollY: -window.scrollY, windowWidth: elementWidth },
+          html2canvas: {
+            scale: 2,
+            scrollY: -window.scrollY,
+            windowWidth: elementWidth,
+          },
           jsPDF: {
             unit: 'in',
             format: [elementWidth / 90, elementHeight / 90] as [number, number],
-            orientation: 'portrait'
+            orientation,
-          }
+          },
         }
 
         try {
@@ -202,15 +244,31 @@
         } catch (err) {
           console.error('PDF 导出失败:', err)
         } finally {
-          // 恢复原样式
+          // 恢复容器样式
           timelineContainer.value.style.maxHeight = originalMaxHeight
           timelineContainer.value.style.overflow = originalOverflow
+
+          // 恢复表格样式
+          originalTableStyles.forEach(({ table, styles }) => {
+            Object.keys(styles).forEach(key => {
+              table.style[key] = styles[key]
+            })
+            // 恢复单元格样式
+            const cells = table.querySelectorAll('th, td')
+            cells.forEach((cell: HTMLElement) => {
+              cell.style.whiteSpace = ''
+              cell.style.wordBreak = ''
+              cell.style.textOverflow = ''
+            })
+          })
         }
       }
 
 
 
 
+
+
       //导出为markdown格式
       const handleExportMarkdown = async () => {
         // 原始 markdown 内容