precompute call waveforms and stop list-time audio loading

frontend/app/components/workspace/CrmWorkspaceApp.vue

@@ -103,6 +103,7 @@ type CommItem = {
   text: string;
   audioUrl?: string;
   duration?: string;
+  waveform?: number[];
   transcript?: string[];
   deliveryStatus?: "PENDING" | "SENT" | "DELIVERED" | "READ" | "FAILED" | string | null;
 };
@@ -1262,6 +1263,19 @@ function parseDurationToSeconds(raw?: string) {
 }
 
 function buildCallWavePeaks(item: CommItem, size = 320) {
+  const stored = Array.isArray(item.waveform)
+    ? item.waveform.map((value) => Number(value)).filter((value) => Number.isFinite(value) && value > 0)
+    : [];
+  if (stored.length) {
+    const sampled = new Float32Array(size);
+    for (let i = 0; i < size; i += 1) {
+      const t = size <= 1 ? 0 : i / (size - 1);
+      const idx = Math.min(stored.length - 1, Math.round(t * (stored.length - 1)));
+      sampled[i] = Math.max(0.05, Math.min(1, stored[idx] ?? 0.05));
+    }
+    return sampled;
+  }
+
   const source = `${item.text} ${(item.transcript ?? []).join(" ")}`.trim() || item.contact;
   let seed = 0;
   for (let i = 0; i < source.length; i += 1) {
@@ -1295,7 +1309,6 @@ async function ensureCommCallWave(itemId: string) {
 
   const callItem = visibleThreadItems.value.find((item) => item.id === itemId && item.kind === "call");
   if (!callItem) return;
-  const audioUrl = getCallAudioUrl(callItem);
 
   const { WaveSurfer } = await loadWaveSurferModules();
   const durationSeconds =
@@ -1314,12 +1327,7 @@ async function ensureCommCallWave(itemId: string) {
     barWidth: 0,
   });
 
-  try {
-    if (!audioUrl) throw new Error("missing_audio_url");
-    await ws.load(audioUrl);
-  } catch {
-    await ws.load("", [peaks], durationSeconds);
-  }
+  await ws.load("", [peaks], durationSeconds);
   commCallWaveSurfers.set(itemId, ws);
 }