The file /Users/neog/Apps/macOS/PredictiveHistory-macOS/Features/Study/StudyView.swift has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   209→        .padding(.vertical, 10)
   210→        .background(Color.secondary.opacity(0.03))
   211→    }
   212→
   213→    private var noVideoPlaceholder: some View {
   214→        VStack(spacing: 16) {
   215→            ZStack {
   216→                Circle()
   217→                    .fill(Color.secondary.opacity(0.1))
   218→                    .frame(width: 80, height: 80)
   219→
   220→                Image(systemName: "play.slash.fill")
   221→                    .font(.system(size: 32))
   222→                    .foregroundStyle(.tertiary)
   223→            }
   224→
   225→            VStack(spacing: 6) {
   226→                Text("Video Not Available")
   227→                    .font(.headline)
   228→                    .foregroundStyle(.secondary)
   229→
   230→                Text("YouTube ID not configured for this video")
   231→                    .font(.subheadline)
   232→                    .foregroundStyle(.tertiary)
   233→            }
   234→
   235→            VStack(spacing: 4) {
   236→                Text("To fix this:")
   237→                    .font(.caption.bold())
   238→                    .foregroundStyle(.tertiary)
   239→
   240→                Text("1. Open the video on YouTube")
   241→                    .font(.caption)
   242→                    .foregroundStyle(.quaternary)
   243→
   244→                Text("2. Copy the video ID from the URL")
   245→                    .font(.caption)
   246→                    .foregroundStyle(.quaternary)
   247→
   248→                Text("3. Add it to Resources/videos.json")
   249→                    .font(.caption)
   250→                    .foregroundStyle(.quaternary)
   251→            }
   252→            .padding()
   253→            .background(
   254→                RoundedRectangle(cornerRadius: 8)
   255→                    .fill(Color.secondary.opacity(0.05))
   256→            )
   257→        }
   258→        .frame(maxWidth: .infinity, maxHeight: .infinity)
   259→        .background(
   260→            LinearGradient(
   261→                colors: [Color.secondary.opacity(0.03), Color.secondary.opacity(0.08)],
   262→                startPoint: .top,
   263→                endPoint: .bottom
   264→            )
   265→        )
   266→    }
   267→
   268→    private var notesSection: some View {
   269→        VStack(alignment: .leading, spacing: 0) {
   270→            // Header