v0.2.7

• Add: MapAdapter.onKey(cb) — forwards a normalized KeyEvent on keydown while the map is focused (scoped to the container, multi-instance safe; editable targets skipped). Raw transport — the consumer maps keys to actions (e.g. Delete/Backspace ⇒ remove selection). Implemented on all 3 engines + FakeAdapter (.key() helper); bindKeyListener exported.
• Add: toolbar submenus — a ToolbarItem with children: ToolbarItem[] becomes a flyout that opens on hover (desktop) and click (touch), into the map based on the toolbar edge (top ⇒ below · bottom ⇒ above · left ⇒ right · right ⇒ left). Two modes: click (parent = fixed category; a child runs its onClick) and toggle (toggle: true, a split button — the parent mirrors the selected child, becomes the active tool, and a parent click re-runs it). An outside press closes the flyout. ToolbarItem.onClick is now optional.
• Add: built-in "lock map" toggle at the end of the bar (default on; ToolbarOptions.lock: false hides it) — freezes pan/zoom/rotate on all 3 engines so the map can't move while drawing. New MapAdapter.setInteractive(enabled): while locked it wins over the controller's transient setPanEnabled/setDoubleClickZoom (remembered and re-applied on unlock). New ToolbarItem.standalone (a utility button whose click doesn't change the active tool selection — also set on the snapshot button now).
• Breaking: removed ToolbarOptions.orientation — the bar's flow is now derived from position (top/bottom edge ⇒ horizontal row, left/right edge ⇒ vertical column), and the submenu flyout follows it (column vs row). Consumers must drop any orientation they passed.
• Fix: OpenLayers toolbar now renders as a solid white bar with plain buttons (OL's default .ol-control buttons were blue/translucent, so the bar looked like loose buttons).