ui: open YouTube URLs inline on the welcome screen

README.md

@@ -186,7 +186,7 @@ Terebi reports facts, not watched status. A consumer such as Tubular decides com
 
 The layout follows [IINA's video-first window](https://iina.io/img/screenshot.png) and the supplied screenshots: a 32-point transparent titlebar with native traffic lights and file icon, plus a frosted 440 × 68-point floating controller. Conjure-inspired **Sunset** styling uses translucent dark-brown glass, warm cream primary text, sand secondary text, and a fixed orange accent for the volume fill, active pin, and drop target. Native slider thumbs and buffered ranges share the palette; warning symbols retain their semantic yellow. Shared vertical padding and an optical offset for symbol/slider insets balance the controller's visible top and bottom margins in both play and pause states. The controller starts centered with a four-percent bottom inset and keeps its relative position when the window changes size.
 
-The empty player uses the same tinted HUD-glass material, faint warm outlines, 12-point rounded corners, and Sunset palette in a centered welcome card. File and YouTube opening actions share a consistently sized row with a subtle orange fill; the card fits the 400 × 240-point minimum window, and the full window still accepts media-file and YouTube-link drops.
+The empty player uses the same tinted HUD-glass material, faint warm outlines, 12-point rounded corners, and Sunset palette in a centered welcome card. File and YouTube opening actions are separate, equally sized buttons with a 10-point gap and subtle orange fills. The YouTube button reveals and focuses an inline URL field below the buttons, spanning their combined width including the gap; Return or the arrow button submits through the existing YouTube URL validation. Other URL-opening entry points retain their dialog. The card fits the minimum window, and the full window still accepts media-file and YouTube-link drops.
 
 With no media open, the full window uses native behind-window HUD glass with a 35%-opaque brown tint. Static, cached amber/rust radial gradients add ambient color only to the empty screen; they disappear during loading or errors, and are never drawn over video or playback chrome. Glass title/control/error surfaces use the same brown tint with half-point sand outlines. Decorative drawing does not intercept input. The idle Metal surface stays attached but hidden; opening media restores a solid black background and letterboxing without tinting the video, and closing it restores the ambient frosted background. macOS controls the material’s appearance, including Reduce Transparency.
 

Sources/App/TerebiApp.swift

@@ -1257,6 +1257,9 @@ private struct PlayerContent: View {
     @Environment(\.accessibilityReduceMotion) private var reduceMotion
     @State private var showsRemainingTime = false
     @State private var dropTargeted = false
+    @State private var showsYouTubeInput = false
+    @State private var youTubeURL = ""
+    @FocusState private var youTubeInputFocused: Bool
     @State private var controlSize = CGSize(width: 440, height: 68)
     // Relative offsets preserve the dragged position across resize/fullscreen.
     @State private var controlOffset = CGSize.zero
@@ -1541,26 +1544,56 @@ private struct PlayerContent: View {
                             }
                             Spacer(minLength: 0)
                         }
-                        HStack(spacing: 0) {
+                        HStack(spacing: 10) {
                             Button(action: model.openPanel) {
                                 Label("Open File…", systemImage: "doc")
                                     .frame(maxWidth: .infinity, minHeight: 40)
                                     .contentShape(Rectangle())
                             }
-                            Divider().frame(height: 20).accessibilityHidden(true)
+                            .background(Color(SunsetPalette.actionFill), in: RoundedRectangle(cornerRadius: 8))
-                            Button(action: model.openYouTubePanel) {
+                            Button {
+                                showsYouTubeInput = true
+                                youTubeInputFocused = true
+                            } label: {
                                 Label("YouTube URL…", systemImage: "link")
                                     .frame(maxWidth: .infinity, minHeight: 40)
                                     .contentShape(Rectangle())
                             }
                             .accessibilityLabel("Open YouTube URL…")
+                            .background(Color(SunsetPalette.actionFill), in: RoundedRectangle(cornerRadius: 8))
                         }
                         .font(.system(size: 13, weight: .medium))
                         .foregroundStyle(Color(SunsetPalette.text))
                         .imageScale(.large)
                         .buttonStyle(.plain)
                         .disabled(!model.canOpen)
+                        if showsYouTubeInput {
+                            HStack(spacing: 8) {
+                                TextField("YouTube video URL", text: $youTubeURL)
+                                    .textFieldStyle(.plain)
+                                    .focused($youTubeInputFocused)
+                                    .accessibilityLabel("YouTube video URL")
+                                    .onAppear { youTubeInputFocused = true }
+                                    .onSubmit { model.openYouTube(youTubeURL) }
+                                Button {
+                                    model.openYouTube(youTubeURL)
+                                } label: {
+                                    Image(systemName: "arrow.right")
+                                        .frame(width: 24, height: 24)
+                                        .contentShape(Rectangle())
+                                }
+                                .buttonStyle(.plain)
+                                .accessibilityLabel("Open YouTube Video")
+                                .help("Open YouTube Video")
+                                .disabled(youTubeURL.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
+                            }
+                            .font(.system(size: 13))
+                            .foregroundStyle(Color(SunsetPalette.text))
+                            .padding(.horizontal, 12)
+                            .frame(height: 40)
                             .background(Color(SunsetPalette.actionFill), in: RoundedRectangle(cornerRadius: 8))
+                            .disabled(!model.canOpen)
+                        }
                         Text("Drop a media file or YouTube link here")
                             .font(.system(size: 12))
                             .foregroundStyle(Color(SunsetPalette.secondaryText))