feat(钢卷管理): 新增生产时间记录及耗时计算功能

添加TimeInput组件用于时间输入，并在钢卷合并、分条、打字、分步操作中增加生产开始/结束时间字段
实现生产耗时自动计算功能，支持显示xx天xx小时xx分钟格式
在基础面板中增加生产时间修正对话框，支持批量修改时间

klp-ui/src/components/TimeInput.vue

@@ -0,0 +1,86 @@
+<template>
+  <div class="time-input-group">
+    <el-date-picker v-model="dateValue" type="date" value-format="yyyy-MM-dd" placeholder="选择日期" style="width: 140px;" @change="updateDateTime" />
+    <span class="time-separator">@</span>
+    <el-input-number :controls="false" v-model="hourValue" placeholder="时" min="0" max="23" style="width: 60px;" @change="updateDateTime" />
+    <span class="time-separator">:</span>
+    <el-input-number :controls="false" v-model="minuteValue" placeholder="分" min="0" max="59" style="width: 60px;" @change="updateDateTime" />
+    <span class="time-separator">:00</span>
+    <el-button v-if="showNowButton" type="text" size="small" @click="setToNow" style="margin-left: 8px;">此刻</el-button>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'TimeInput',
+  props: {
+    value: {
+      type: String,
+      default: ''
+    },
+    showNowButton: {
+      type: Boolean,
+      default: false
+    }
+  },
+  data() {
+    return {
+      dateValue: '',
+      hourValue: '',
+      minuteValue: ''
+    };
+  },
+  watch: {
+    value: {
+      handler(newValue) {
+        this.parseDateTime(newValue);
+      },
+      immediate: true
+    }
+  },
+  methods: {
+    parseDateTime(dateTimeStr) {
+      if (!dateTimeStr) {
+        this.dateValue = '';
+        this.hourValue = '';
+        this.minuteValue = '';
+        return;
+      }
+      const date = new Date(dateTimeStr);
+      if (!isNaN(date.getTime())) {
+        this.dateValue = date.toISOString().split('T')[0];
+        this.hourValue = date.getHours();
+        this.minuteValue = date.getMinutes();
+      }
+    },
+    updateDateTime() {
+      if (this.dateValue && this.hourValue !== '' && this.minuteValue !== '') {
+        const dateTimeStr = `${this.dateValue} ${this.hourValue}:${this.minuteValue}:00`;
+        this.$emit('input', dateTimeStr);
+      } else {
+        this.$emit('input', '');
+      }
+    },
+    setToNow() {
+      const now = new Date();
+      this.dateValue = now.toISOString().split('T')[0];
+      this.hourValue = now.getHours();
+      this.minuteValue = now.getMinutes();
+      this.updateDateTime();
+    }
+  }
+};
+</script>
+
+<style scoped>
+.time-input-group {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.time-separator {
+  color: #909399;
+  font-size: 14px;
+}
+</style>