Let a multi-selection be copied as plain lines as well as a list

Copying several notes only produced a numbered list, which is wrong for
pasting into a prompt that already has structure. The selection now
offers both forms, Shift+click selects a range, and a selection bar
makes it obvious that more than one note is selected. Esc clears the
selection before it hides the panel.

Sources/Prompt/PanelView.swift

@@ -13,6 +13,7 @@ struct PanelView: View {
     @State private var showSync = false
     @State private var joinCode = ""
     @State private var selection = Set<UUID>()
+    @State private var lastSelectedID: UUID?
     @State private var copiedID: UUID?
     @State private var accessibilityGranted = AXIsProcessTrusted()
 
@@ -31,6 +32,9 @@ struct PanelView: View {
             Divider()
             content
             Divider()
+            if !selection.isEmpty {
+                selectionBar
+            }
             composerField
         }
         .frame(minWidth: 300)
@@ -223,6 +227,7 @@ struct PanelView: View {
             }
         }
         .buttonStyle(.plain)
+        .help("Click to copy · Cmd+click to select several · Shift+click for a range · right-click for more")
         .contextMenu { contextMenu(for: item) }
     }
 
@@ -262,7 +267,11 @@ struct PanelView: View {
             Button("Copy") { copy(item) }
             Button("Copy as List") {
                 store.copyAsList(ids: effectiveIDs(for: item))
-                flashCopied(item)
+                flashCopied(item.id)
+            }
+            Button("Copy as Lines") {
+                store.copyAsLines(ids: effectiveIDs(for: item))
+                flashCopied(item.id)
             }
             Divider()
             Button(item.done ? "Mark as Not Done" : "Mark as Done") { store.toggleDone(item.id) }
@@ -279,7 +288,7 @@ struct PanelView: View {
             if selection.count > 1, selection.contains(item.id) {
                 Button("Merge Notes") {
                     store.merge(ids: selection)
-                    selection.removeAll()
+                    clearSelection()
                 }
             }
             Menu("Move To") {
@@ -456,6 +465,49 @@ struct PanelView: View {
         }
     }
 
+    // MARK: - Selection
+
+    private var selectionBar: some View {
+        HStack(spacing: 12) {
+            Text("\(selection.count) selected")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            Spacer()
+            Button("Copy as List") { copySelection(asList: true) }
+                .font(.caption)
+                .buttonStyle(.plain)
+                .foregroundStyle(Color.accentColor)
+            Button("Copy as Lines") { copySelection(asList: false) }
+                .font(.caption)
+                .buttonStyle(.plain)
+                .foregroundStyle(Color.accentColor)
+            Button { clearSelection() } label: {
+                Image(systemName: "xmark.circle.fill")
+            }
+            .buttonStyle(.plain)
+            .foregroundStyle(.tertiary)
+            .help("Clear selection (Esc)")
+        }
+        .padding(.horizontal, 12)
+        .padding(.vertical, 6)
+        .background(Color.accentColor.opacity(0.12))
+    }
+
+    private func copySelection(asList: Bool) {
+        guard !selection.isEmpty else { return }
+        if asList {
+            store.copyAsList(ids: selection)
+        } else {
+            store.copyAsLines(ids: selection)
+        }
+        if let id = selection.first { flashCopied(id) }
+    }
+
+    private func clearSelection() {
+        selection.removeAll()
+        lastSelectedID = nil
+    }
+
     // MARK: - Composer
 
     private var composerField: some View {
@@ -464,7 +516,15 @@ struct PanelView: View {
                 .textFieldStyle(.plain)
                 .focused($focusedField, equals: .composer)
                 .onSubmit(submit)
-                .onExitCommand { PanelController.shared.hide() }
+                .onExitCommand {
+                    // Esc clears a selection first, and only hides the panel
+                    // once there is nothing selected.
+                    if selection.isEmpty {
+                        PanelController.shared.hide()
+                    } else {
+                        clearSelection()
+                    }
+                }
             if !composer.isEmpty {
                 Button(action: submit) { Image(systemName: "arrow.up.circle.fill") }
                     .buttonStyle(.plain)
@@ -506,11 +566,13 @@ struct PanelView: View {
             }
             .keyboardShortcut(",", modifiers: .command)
             Button("") {
-                guard !selection.isEmpty else { return }
-                store.copyAsList(ids: selection)
-                if let id = selection.first { flashCopied(PromptItem(id: id, content: .text(""))) }
+                copySelection(asList: true)
             }
             .keyboardShortcut("c", modifiers: [.command, .shift])
+            Button("") {
+                copySelection(asList: false)
+            }
+            .keyboardShortcut("c", modifiers: [.command, .option])
         }
         .opacity(0)
         .frame(width: 0, height: 0)
@@ -520,26 +582,40 @@ struct PanelView: View {
     // MARK: - Actions
 
     private func handleClick(_ item: PromptItem) {
-        if NSApp.currentEvent?.modifierFlags.contains(.command) == true {
+        let modifiers = NSApp.currentEvent?.modifierFlags ?? []
+        if modifiers.contains(.command) {
             if selection.contains(item.id) {
                 selection.remove(item.id)
             } else {
                 selection.insert(item.id)
             }
+            lastSelectedID = item.id
+            return
+        }
+        if modifiers.contains(.shift), let anchor = lastSelectedID, anchor != item.id {
+            selectRange(from: anchor, to: item.id)
             return
         }
         copy(item)
     }
 
-    private func copy(_ item: PromptItem) {
-        store.copy(item)
-        flashCopied(item)
+    private func selectRange(from anchor: UUID, to target: UUID) {
+        let ids = displayedItems.map(\.item.id)
+        guard let start = ids.firstIndex(of: anchor), let end = ids.firstIndex(of: target) else { return }
+        let range = start <= end ? start...end : end...start
+        selection = Set(ids[range])
+        lastSelectedID = target
     }
 
-    private func flashCopied(_ item: PromptItem) {
-        withAnimation { copiedID = item.id }
+    private func copy(_ item: PromptItem) {
+        store.copy(item)
+        flashCopied(item.id)
+    }
+
+    private func flashCopied(_ id: UUID) {
+        withAnimation { copiedID = id }
         DispatchQueue.main.asyncAfter(deadline: .now() + 1.2) {
-            if copiedID == item.id {
+            if copiedID == id {
                 withAnimation { copiedID = nil }
             }
         }