修复图表实例标识并扩展版本兼容性

src/utils/waveformId.ts

@@ -0,0 +1,10 @@
+import { getCurrentInstance } from 'vue'
+
+let fallbackId = 0
+
+/** Generate an instance-scoped id without requiring Vue 3.5's useId API. */
+export function useWaveformInstanceId(prefix = 'waveform') {
+  const instance = getCurrentInstance()
+  const instanceId = instance ? `v${instance.uid}` : `f${++fallbackId}`
+  return `${prefix}-${instanceId}`
+}