fix: comment waveform integration with timestamps and avatars

- Add author_avatar_url to API schema and frontend interface
- Capture current playhead timestamp when creating comments
- Display user avatars in waveform markers instead of placeholders
- Improve marker visibility with better styling (size, borders, shadows)
- Fix TypeScript type errors for nullable timestamps
- Add debug logging for troubleshooting

This implements the full comment waveform integration as requested:
- Comments are created with exact playhead timestamps
- Waveform markers show at correct positions with user avatars
- Clicking markers scrolls to corresponding comments
- Backward compatible with existing comments without timestamps

web/src/hooks/useWaveform.ts

@@ -97,24 +97,27 @@ export function useWaveform(
       const wavesurfer = wsRef.current;
       const markerElement = document.createElement("div");
       markerElement.style.position = "absolute";
-      markerElement.style.width = "20px";
-      markerElement.style.height = "20px";
-      markerElement.style.borderRadius = "50% ";
+      markerElement.style.width = "24px";
+      markerElement.style.height = "24px";
+      markerElement.style.borderRadius = "50%";
       markerElement.style.backgroundColor = "var(--accent)";
       markerElement.style.cursor = "pointer";
       markerElement.style.zIndex = "9999";
       markerElement.style.left = `${(marker.time / wavesurfer.getDuration()) * 100}%`;
       markerElement.style.transform = "translateX(-50%) translateY(-50%)";
-      markerElement.style.top = "50% ";
+      markerElement.style.top = "50%";
+      markerElement.style.border = "2px solid white";
+      markerElement.style.boxShadow = "0 0 4px rgba(0, 0, 0, 0.3)";
       markerElement.title = `Comment at ${formatTime(marker.time)}`;
       markerElement.onclick = marker.onClick;
 
       if (marker.icon) {
         const iconElement = document.createElement("img");
         iconElement.src = marker.icon;
-        iconElement.style.width = "100% ";
-        iconElement.style.height = "100% ";
-        iconElement.style.borderRadius = "50% ";
+        iconElement.style.width = "100%";
+        iconElement.style.height = "100%";
+        iconElement.style.borderRadius = "50%";
+        iconElement.style.objectFit = "cover";
         markerElement.appendChild(iconElement);
       }
 

web/src/pages/SongPage.tsx

@@ -13,8 +13,9 @@ interface SongComment {
   body: string;
   author_id: string;
   author_name: string;
+  author_avatar_url: string | null;
   created_at: string;
-  timestamp: number; // Timestamp in seconds
+  timestamp: number | null; // Timestamp in seconds
 }
 
 export function SongPage() {
@@ -80,26 +81,38 @@ export function SongPage() {
 
   useEffect(() => {
     if (comments) {
+      console.log('Comments data:', comments);
       clearMarkers();
       comments.forEach((comment) => {
+        console.log('Processing comment:', comment.id, 'timestamp:', comment.timestamp, 'avatar:', comment.author_avatar_url);
         if (comment.timestamp !== undefined && comment.timestamp !== null) {
+          console.log('Adding marker at time:', comment.timestamp);
           addMarker({
             id: comment.id,
             time: comment.timestamp,
             onClick: () => scrollToComment(comment.id),
-            icon: "https://via.placeholder.com/20", // Replace with actual user icon URL
+            icon: comment.author_avatar_url || "https://via.placeholder.com/20",
           });
+        } else {
+          console.log('Skipping comment without timestamp:', comment.id);
         }
       });
     }
   }, [comments, addMarker, clearMarkers]);
 
   const addCommentMutation = useMutation({
-    mutationFn: (body: string) => api.post(`/songs/${songId}/comments`, { body }),
+    mutationFn: ({ body, timestamp }: { body: string; timestamp: number }) => {
+      console.log('Creating comment with timestamp:', timestamp);
+      return api.post(`/songs/${songId}/comments`, { body, timestamp });
+    },
     onSuccess: () => {
+      console.log('Comment created successfully');
       qc.invalidateQueries({ queryKey: ["comments", songId] });
       setCommentBody("");
     },
+    onError: (error) => {
+      console.error('Error creating comment:', error);
+    }
   });
 
   const deleteCommentMutation = useMutation({
@@ -196,7 +209,7 @@ export function SongPage() {
               {c.timestamp !== undefined && c.timestamp !== null && (
                 <div style={{ display: "flex", gap: 8, marginBottom: 6 }}>
                   <button
-                    onClick={() => seekTo(c.timestamp)}
+                    onClick={() => seekTo(c.timestamp!)}
                     style={{ background: "var(--accent-bg)", border: "1px solid var(--accent)", borderRadius: 4, color: "var(--accent)", cursor: "pointer", fontSize: 10, padding: "2px 8px", fontFamily: "monospace" }}
                   >
                     {formatTime(c.timestamp)}
@@ -220,7 +233,7 @@ export function SongPage() {
             style={{ flex: 1, padding: "8px 12px", background: "var(--bg-inset)", border: "1px solid var(--border)", borderRadius: 6, color: "var(--text)", fontSize: 13, resize: "vertical", fontFamily: "inherit" }}
           />
           <button
-            onClick={() => commentBody.trim() && addCommentMutation.mutate(commentBody.trim())}
+            onClick={() => commentBody.trim() && addCommentMutation.mutate({ body: commentBody.trim(), timestamp: currentTime })}
             disabled={!commentBody.trim() || addCommentMutation.isPending}
             style={{ background: "var(--accent)", border: "none", borderRadius: 6, color: "var(--accent-fg)", cursor: "pointer", padding: "0 18px", fontWeight: 600, fontSize: 13, alignSelf: "stretch" }}
           >