sidebar: single-click opens note, delete key works, space previews

src/SidebarView.swift

@@ -3,6 +3,8 @@ import SwiftUI
 struct SidebarView: View {
     @ObservedObject var state: AppState
     @State private var lastClickedID: UUID?
+    @State private var previewNote: NoteInfo?
+    @FocusState private var sidebarFocused: Bool
 
     private let dateFormatter: DateFormatter = {
         let f = DateFormatter()
@@ -49,9 +51,6 @@ struct SidebarView: View {
                                 dateFormatter: dateFormatter
                             )
                             .contentShape(Rectangle())
-                            .onTapGesture(count: 2) {
-                                state.openNote(note.id)
-                            }
                             .onTapGesture(count: 1) {
                                 handleClick(note: note, index: index)
                             }
@@ -68,11 +67,29 @@ struct SidebarView: View {
                         }
                     }
                 }
+                .focusable()
+                .focused($sidebarFocused)
                 .onDeleteCommand {
                     guard !state.selectedNoteIDs.isEmpty else { return }
                     state.deleteNotes(state.selectedNoteIDs)
                     lastClickedID = nil
                 }
+                .onKeyPress(.space) {
+                    guard let id = state.selectedNoteIDs.first,
+                          state.selectedNoteIDs.count == 1,
+                          let note = state.noteList.first(where: { $0.id == id }) else {
+                        return .ignored
+                    }
+                    if previewNote?.id == note.id {
+                        previewNote = nil
+                    } else {
+                        previewNote = note
+                    }
+                    return .handled
+                }
+                .popover(item: $previewNote, arrowEdge: .trailing) { note in
+                    NotePreviewView(note: note, state: state)
+                }
             }
         }
         .background(Color(ns: Theme.current.base))
@@ -80,6 +97,7 @@ struct SidebarView: View {
     }
 
     private func handleClick(note: NoteInfo, index: Int) {
+        sidebarFocused = true
         let flags = NSEvent.modifierFlags
         if flags.contains(.command) {
             state.selectNote(note.id, extend: true)
@@ -95,11 +113,44 @@ struct SidebarView: View {
             }
         } else {
             state.selectNote(note.id)
+            state.openNote(note.id)
             lastClickedID = note.id
         }
     }
 }
 
+struct NotePreviewView: View {
+    let note: NoteInfo
+    @ObservedObject var state: AppState
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            Text(note.title)
+                .font(.headline)
+                .foregroundColor(Color(ns: Theme.current.text))
+            Divider()
+            ScrollView {
+                Text(previewText)
+                    .font(.body)
+                    .foregroundColor(Color(ns: Theme.current.subtext0))
+                    .frame(maxWidth: .infinity, alignment: .leading)
+            }
+        }
+        .padding()
+        .frame(width: 320, height: 240)
+        .background(Color(ns: Theme.current.base))
+    }
+
+    private var previewText: String {
+        let bridge = RustBridge.shared
+        if bridge.cacheLoad(note.id) {
+            let text = bridge.getText(note.id)
+            return String(text.prefix(2000))
+        }
+        return "(unable to load preview)"
+    }
+}
+
 struct NoteRow: View {
     let note: NoteInfo
     let isSelected: Bool