fix: 导出列宽 — 配方名自适应，其他列统一窄宽度，成分列35

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/KitExport.vue

@@ -222,14 +222,23 @@ async function exportExcel(mode) {
     row.height = 24
   }
 
-  function autoCols(ws, minWidth = 10) {
-    ws.columns.forEach(col => {
-      let max = minWidth
+  function autoCols(ws, ingredientCol = -1) {
+    ws.columns.forEach((col, i) => {
+      if (i === 0) {
+        // First column (配方名): fit longest content
+        let max = 8
         col.eachCell({ includeEmpty: true }, cell => {
-        const len = cell.value ? String(cell.value).length * 1.5 : 0
+          const len = cell.value ? String(cell.value).length * 1.8 : 0
           if (len > max) max = len
         })
-      col.width = Math.min(max + 2, 40)
+        col.width = Math.min(max + 2, 30)
+      } else if (i === ingredientCol) {
+        // Ingredient column: wider
+        col.width = 35
+      } else {
+        // All other columns: uniform narrow width
+        col.width = 10
+      }
     })
   }
 
@@ -288,7 +297,7 @@ async function exportExcel(mode) {
       }
     }
 
-    autoCols(ws)
+    autoCols(ws, mode === 'full' ? 2 : -1)
 
     // Style cost columns
     ws.eachRow((row, rowNum) => {
@@ -335,7 +344,9 @@ async function exportExcel(mode) {
     })
   }
 
-  autoCols(csWs)
+  // Cross sheet: ingredient is last column in full mode
+  const csIngCol = mode === 'full' ? csHeaders.length - 1 : -1
+  autoCols(csWs, csIngCol)
 
   // Download
   const buf = await wb.xlsx.writeBuffer()