Add keyboard navigation shortcuts

Sources/MusicAssistantApp/Presentation/ChatWorkspaceView.swift

@@ -182,6 +182,7 @@ private struct ChatComposer: View {
                 Label("Send", systemImage: "paperplane.fill")
                     .labelStyle(.iconOnly)
             }
+            .keyboardShortcut(.return, modifiers: .command)
             .buttonStyle(.borderedProminent)
             .disabled(text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
             .help("Send")

Sources/MusicAssistantApp/Presentation/ProjectBrowserView.swift

@@ -43,6 +43,7 @@ struct ProjectBrowserView: View {
                     } label: {
                         Label("New Project", systemImage: "plus")
                     }
+                    .keyboardShortcut("n", modifiers: .command)
                     .disabled(viewModel.isCreatingProject)
                 }
             }

Sources/MusicAssistantApp/Presentation/ProjectInspectorView.swift

@@ -28,6 +28,7 @@ struct ProjectInspectorView: View {
                 } label: {
                     Label("Save", systemImage: "tray.and.arrow.down")
                 }
+                .keyboardShortcut("s", modifiers: .command)
                 .disabled(isSaving)
             }
             .padding(16)

docs/TASKS.md

@@ -114,7 +114,7 @@ requirement is missing and blocks implementation, record it in
 
 -   [x] Add validation for contradictory/invalid project settings.
 -   [x] Add loading, offline and provider-error states.
--   [ ] Add accessibility labels and keyboard navigation.
+-   [x] Add accessibility labels and keyboard navigation.
 -   [ ] Test project/version recovery.
 -   [ ] Test AI output against locked user choices.
 -   [ ] Test selected instruments influence compiled song-generation