fix: debugger的波形显示修复

src/components/WaveformDisplay/WaveformDisplay.vue

@@ -180,15 +180,12 @@ const option = computed((): EChartsOption => {
       // 构造带过渡的点序列
       function buildVcdLine(valArr: number[], high: number, low: number) {
         const points: {x: number, y: number}[] = [];
-        for (let i = 0; i < valArr.length; i++) {
-          const v = valArr[i] > 0 ? high : low;
+        let lastValue = high;
+        points.push({x: xArr[0], y: lastValue});
+        for (let i = 1; i < valArr.length; i++) {
+          const v = valArr[i] !== valArr[i-1] ? (lastValue === high ? low : high) : lastValue;
           points.push({x: xArr[i], y: v});
-          // 检查下一个点是否变化，若变化则插入过渡点
-          if (i < valArr.length - 1 && valArr[i] !== valArr[i+1]) {
-            // 过渡点，x略微偏移（如+0.3），y为下一个值
-            const nextV = valArr[i+1] > 0 ? high : low;
-            points.push({x: xArr[i]+0.3, y: nextV});
-          }
+          lastValue = v;
         }
         // 返回y数组，x由category轴控制
         return points.map(p => p.y);