feat： 变更单-新增&编辑-数量kg-数量字段改为可输入两位小数（包括合计）

@@ -393,7 +393,8 @@ export default {
         const v = Number(it && it.quantity)
         return acc + (isNaN(v) ? 0 : v)
       }, 0)
-      this.form.afterTotalQuantity = sum
+       const fixedSum = Number(sum.toFixed(2))
+      this.form.afterTotalQuantity = fixedSum
     },
   }
 }

@@ -312,7 +312,8 @@ export default {
         const v = Number(it && it.quantity)
         return acc + (isNaN(v) ? 0 : v)
       }, 0)
-      this.form.afterTotalQuantity = sum
+      const fixedSum = Number(sum.toFixed(2));
+      this.form.afterTotalQuantity = fixedSum;
     },
   }
 }

@@ -113,8 +113,9 @@
                             <template v-slot:footer>
                                 <uni-easyinput type="digit" v-model="item.quantity" placeholder="请输入数量kg"
                                     :inputBorder="false"
-                                    @input="onNonNegativeNumberInput($event, item, idx, 'quantity')"
-                                    @blur="onNonNegativeNumberBlur(item, idx, 'quantity')" />
+                                    @input="onTwoDecimalInput($event, item, idx, 'quantity')"
+                                    @blur="onTwoDecimalBlur(item, idx, 'quantity')"
+                                    />
                             </template>
                         </uni-list-item>
                         <uni-list-item v-if="item.showSalesPrice" title="销售价格">
@@ -380,6 +381,49 @@ export default {
             if (isNaN(n)) item[field] = ''
             if (typeof idx === 'number') this.$set(this.items, idx, { ...item })
         },
+        // 限制输入为2位小数    
+        onTwoDecimalInput(val, item, idx, field) {
+            let v = String(val != null ? val : (item && item[field]) || '')
+            v = v.replace(/[^0-9.]/g, '')
+            v = v.replace(/(\..*)\./g, '$1')
+            
+            // Restrict to 2 decimal places
+            const decimalIndex = v.indexOf('.')
+            if (decimalIndex !== -1 && v.length > decimalIndex + 3) {
+                v = v.substring(0, decimalIndex + 3)
+            }
+
+            if (v.startsWith('.')) v = '0' + v
+            
+            // If the value was modified (truncated or cleaned)
+            if (String(val) !== v) {
+                // Hack: Temporarily set the dirty value to trigger Vue update mechanism
+                // This ensures that when we set the clean value back, Vue detects a change
+                item[field] = val
+                if (typeof idx === 'number') this.$set(this.items, idx, { ...item })
+                
+                // Then revert to the clean value asynchronously
+                setTimeout(() => {
+                    item[field] = v
+                    if (typeof idx === 'number') this.$set(this.items, idx, { ...item })
+                }, 0)
+            } else {
+                item[field] = v
+                if (typeof idx === 'number') this.$set(this.items, idx, { ...item })
+            }
+        },
+        onTwoDecimalBlur(item, idx, field) {
+            let v = String((item && item[field]) || '')
+            const num = Number(v)
+            if (isNaN(num) || num < 0) {
+                item[field] = '0'
+            } else {
+                if (v.endsWith('.')) {
+                    item[field] = v.slice(0, -1)
+                }
+            }
+            if (typeof idx === 'number') this.$set(this.items, idx, { ...item })
+        },
         toggleViewCollapse() {
             this.collapsedView = !this.collapsedView
         },