fix(timeline): drag and drop to create new track

apps/web/src/components/editor/timeline.tsx

@@ -566,15 +566,6 @@ export function Timeline() {
       onMouseLeave={() => setIsInTimeline(false)}
       onWheel={handleWheel}
     >
-      {/* Show overlay when dragging media over the timeline */}
-      {isDragOver && (
-        <div className="absolute inset-0 z-20 flex items-center justify-center pointer-events-none backdrop-blur-lg">
-          <div>
-            Drop media here to add to timeline
-          </div>
-        </div>
-      )}
-
       {/* Toolbar */}
       <div className="border-b flex items-center px-2 py-1 gap-1">
         <TooltipProvider delayDuration={500}>
@@ -953,6 +944,17 @@ export function Timeline() {
                     )}
                   </>
                 )}
+                {isDragOver && (
+                  <div
+                    className="absolute left-0 right-0 border-2 border-dashed border-accent flex items-center justify-center text-muted-foreground"
+                    style={{
+                      top: `${tracks.length * 60}px`,
+                      height: "60px",
+                    }}
+                  >
+                    <div>Drop media here to add a new track</div>
+                  </div>
+                )}
               </div>
             </div>
           </div>