Add delete to the selection bar and drop the in-header close button

The selection bar covered copying but not the other action people reach
for with a selection. The header also carried a second close button next
to the window's own traffic light, so it was removed in favor of that.

AGENTS.md

@@ -31,13 +31,20 @@ clicking an item copies it back to the clipboard.
   `setDone(_:ids:)`, `move(ids:to:)`) back the selection context menu, so one
   action applies to every selected item and image files are cleaned up once.
   Saves on every mutation.
-- `Sources/Prompt/PanelView.swift` — the panel UI. Header (section switcher,
-  search, add photos, close), item list, composer. Composer `# Name` creates/
+- `Sources/Prompt/Theme.swift` — the panel's appearance-aware colours. Dark
+  mode is pure black rather than the system window grey (the panel is a
+  full-height strip beside your work, where grey reads as a half-lit window);
+  light mode keeps the system window colour. `Theme.background` is also handed
+  to the `NSPanel` so the strip under the transparent titlebar matches, and the
+  row colour stays slightly lighter than black so cards remain visible.
+- `Sources/Prompt/PanelView.swift` — the panel UI. Header (workspace switcher,
+  search, add photos), item list, composer. There is no in-header close button:
+  the window's own close button hides the panel. Composer `# Name` creates/
   switches sections. Click = select (Shift+click for a range); the selection
-  bar offers Copy (single item), Copy as List and Copy as Lines; right-click =
-  context menu acting on the whole selection (Copy, Copy as List, Copy as
-  Lines, Done, Edit, Open, Merge, Move To, Delete). Esc clears the selection
-  before it hides the panel. Drop target for images/files.
+  bar offers Copy (single item), Copy as List, Copy as Lines and Delete;
+  right-click = context menu acting on the whole selection (Copy, Copy as List,
+  Copy as Lines, Done, Edit, Open, Merge, Move To, Delete). Esc clears the
+  selection before it hides the panel. Drop target for images/files.
 - `Sources/Prompt/PanelController.swift` — owns the floating `NSPanel`
   (`.nonactivatingPanel`, `.floating`, right-edge docked, frame autosaved as
   `PromptPanel`), the Cmd+V image-paste monitor, and `EditWindowController`

README.md

@@ -5,8 +5,8 @@ A native macOS app for keeping prompts and photos, in the spirit of
 to your work. Select what you need and send it back to your clipboard.
 
 - **Click to select** — clicking a card selects it (Shift+click for a range),
-  and the selection bar copies a single item as-is, or the whole selection as a
-  numbered list or as plain newline-separated lines.
+  and the selection bar copies a single item as-is, the whole selection as a
+  numbered list or as plain newline-separated lines, or deletes it.
 - **Text or photo** — copying sends text back as text and a photo back as an
   image.
 - **Capture from anywhere** — select text in any app and tap **Left Shift twice**.

Sources/Prompt/PanelController.swift

@@ -56,6 +56,10 @@ final class PanelController: NSObject {
         panel.isMovableByWindowBackground = true
         panel.hidesOnDeactivate = false
         panel.isReleasedWhenClosed = false
+        panel.isOpaque = true
+        // Match the SwiftUI content so the titlebar strip and any resize flash
+        // do not show the system grey through.
+        panel.backgroundColor = Theme.background
         panel.collectionBehavior = [.canJoinAllSpaces, .fullScreenAuxiliary]
         panel.contentView = NSHostingView(rootView: PanelView(store: Store.shared))
         panel.setFrameAutosaveName("PromptPanel")

Sources/Prompt/PanelView.swift

@@ -40,6 +40,7 @@ struct PanelView: View {
             composerField
         }
         .frame(minWidth: 300)
+        .background(Theme.backgroundSwiftUI)
         .background(shortcutButtons)
         .overlay(sectionSwitcher)
         .overlay(syncOverlay)
@@ -82,9 +83,6 @@ struct PanelView: View {
                 .buttonStyle(.plain).foregroundStyle(.secondary).help("Search (Cmd+F)")
             Button { addPhotos() } label: { Image(systemName: "photo.on.rectangle.angled") }
                 .buttonStyle(.plain).foregroundStyle(.secondary).help("Add photos")
-            Button { PanelController.shared.hide() } label: { Image(systemName: "xmark") }
-                .buttonStyle(.plain).foregroundStyle(.secondary)
-                .help("Hide the panel (Cmd+W) — Prompt keeps running so Shift-Shift capture still works. Quit from the menu bar icon or Cmd+Q.")
         }
         .padding(.horizontal, 12)
         .padding(.vertical, 10)
@@ -248,7 +246,7 @@ struct PanelView: View {
 
     private func rowBackground(_ item: PromptItem) -> Color {
         if selection.contains(item.id) { return Color.accentColor.opacity(0.25) }
-        return Color.primary.opacity(0.05)
+        return Theme.rowSwiftUI
     }
 
     @ViewBuilder
@@ -575,6 +573,12 @@ struct PanelView: View {
                 .font(.caption)
                 .buttonStyle(.plain)
                 .foregroundStyle(Color.accentColor)
+            Button { deleteSelection() } label: {
+                Image(systemName: "trash")
+            }
+            .buttonStyle(.plain)
+            .foregroundStyle(.red)
+            .help("Delete selected")
             Button { clearSelection() } label: {
                 Image(systemName: "xmark.circle.fill")
             }
@@ -587,6 +591,12 @@ struct PanelView: View {
         .background(Color.accentColor.opacity(0.12))
     }
 
+    private func deleteSelection() {
+        guard !selection.isEmpty else { return }
+        store.delete(ids: selection)
+        clearSelection()
+    }
+
     private func copySelection(asList: Bool) {
         guard !selection.isEmpty else { return }
         if asList {

Sources/Prompt/Theme.swift

@@ -0,0 +1,28 @@
+import AppKit
+import SwiftUI
+
+/// Appearance-aware colours for the panel.
+///
+/// Dark mode is pure black rather than the system window grey: the panel is a
+/// full-height strip that sits beside your work, and the grey reads as a
+/// half-lit window next to a dark editor or terminal.
+enum Theme {
+    static func isDark(_ appearance: NSAppearance) -> Bool {
+        appearance.bestMatch(from: [.aqua, .darkAqua]) == .darkAqua
+    }
+
+    /// The panel's own background (also handed to the NSPanel so the area under
+    /// the transparent titlebar matches).
+    static let background = NSColor(name: nil) { appearance in
+        isDark(appearance) ? .black : .windowBackgroundColor
+    }
+
+    /// Card background, kept subtle but visible against pure black.
+    static let row = NSColor(name: nil) { appearance in
+        isDark(appearance) ? NSColor(white: 1, alpha: 0.07) : NSColor(white: 0, alpha: 0.05)
+    }
+
+    /// Same colours for SwiftUI.
+    static let backgroundSwiftUI = Color(nsColor: background)
+    static let rowSwiftUI = Color(nsColor: row)
+}