Make the row checkbox select items instead of ticking them off

The checkbox was marking items done, but the intent was to gather items
and act on them: tick several, then right-click to copy, copy as a list,
move, merge or delete them all at once. Done is still available from the
same menu, it is just no longer what the checkbox does.

Sources/Prompt/PanelView.swift

@@ -193,20 +193,20 @@ struct PanelView: View {
         .padding(.vertical, 48)
     }
 
-    /// Rows are checklists by default: a checkbox to tick an item off, with the
-    /// rest of the row copying on click. The row cannot be a Button because the
-    /// checkbox is one, and nested buttons do not receive clicks.
+    /// Rows carry a checkbox that *selects* the item, so a selection can be
+    /// copied or deleted from the context menu. The row cannot be a Button
+    /// because the checkbox is one, and nested buttons do not receive clicks.
     private func row(for item: PromptItem, sectionName: String) -> some View {
         HStack(alignment: .top, spacing: 8) {
             Button {
-                store.toggleDone(item.id)
+                toggleSelection(item.id)
             } label: {
-                Image(systemName: item.done ? "checkmark.circle.fill" : "circle")
+                Image(systemName: selection.contains(item.id) ? "checkmark.circle.fill" : "circle")
                     .font(.system(size: 15))
-                    .foregroundStyle(item.done ? Color.accentColor : Color.secondary.opacity(0.55))
+                    .foregroundStyle(selection.contains(item.id) ? Color.accentColor : Color.secondary.opacity(0.55))
             }
             .buttonStyle(.plain)
-            .help(item.done ? "Mark as not done" : "Mark as done")
+            .help(selection.contains(item.id) ? "Deselect" : "Select for copy or delete")
 
             VStack(alignment: .leading, spacing: 6) {
                 if !sectionName.isEmpty {
@@ -278,43 +278,51 @@ struct PanelView: View {
     }
 
     private func contextMenu(for item: PromptItem) -> some View {
-        Group {
+        let ids = effectiveIDs(for: item)
+        let multiple = ids.count > 1
+        return Group {
             Button("Copy") { copy(item) }
-            Button("Copy as List") {
-                store.copyAsList(ids: effectiveIDs(for: item))
+            Button(multiple ? "Copy \(ids.count) as List" : "Copy as List") {
+                store.copyAsList(ids: ids)
                 flashCopied(item.id)
             }
-            Button("Copy as Lines") {
-                store.copyAsLines(ids: effectiveIDs(for: item))
+            Button(multiple ? "Copy \(ids.count) as Lines" : "Copy as Lines") {
+                store.copyAsLines(ids: ids)
                 flashCopied(item.id)
             }
             Divider()
-            Button(item.done ? "Mark as Not Done" : "Mark as Done") { store.toggleDone(item.id) }
-            if case .text(let text) = item.content {
+            Button(item.done ? "Mark as Not Done" : "Mark as Done") {
+                store.setDone(!item.done, ids: ids)
+            }
+            if case .text(let text) = item.content, !multiple {
                 Button("Edit…") {
                     PanelController.shared.editController.edit(itemID: item.id, text: text)
                 }
             }
-            if case .image(let filename) = item.content {
+            if case .image(let filename) = item.content, !multiple {
                 Button("Open") {
                     NSWorkspace.shared.open(store.imageURL(for: filename))
                 }
             }
-            if selection.count > 1, selection.contains(item.id) {
+            if multiple {
                 Button("Merge Notes") {
-                    store.merge(ids: selection)
+                    store.merge(ids: ids)
                     clearSelection()
                 }
             }
             Menu("Move To") {
                 ForEach(store.sections.filter { $0.id != store.sectionID(of: item.id) }) { section in
-                    Button(section.name) { store.move(item.id, to: section.id) }
+                    Button(section.name) {
+                        store.move(ids: ids, to: section.id)
+                        if multiple { clearSelection() }
+                    }
                 }
             }
             Divider()
-            Button("Delete", role: .destructive) {
-                selection.remove(item.id)
-                store.delete(item.id)
+            Button(multiple ? "Delete \(ids.count) Items" : "Delete", role: .destructive) {
+                store.delete(ids: ids)
+                selection.subtract(ids)
+                lastSelectedID = nil
             }
         }
     }
@@ -664,12 +672,7 @@ struct PanelView: View {
     private func handleClick(_ item: PromptItem) {
         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
+            toggleSelection(item.id)
             return
         }
         if modifiers.contains(.shift), let anchor = lastSelectedID, anchor != item.id {
@@ -679,6 +682,15 @@ struct PanelView: View {
         copy(item)
     }
 
+    private func toggleSelection(_ id: UUID) {
+        if selection.contains(id) {
+            selection.remove(id)
+        } else {
+            selection.insert(id)
+        }
+        lastSelectedID = id
+    }
+
     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 }