fix(core): set open state false when switching to no entry

[JianJroh]

Description

Before

After opening any dock entry once, the dock stayed fully expanded forever — moving the mouse away or waiting past inactiveTimeout no longer collapsed it to the small minimized dot. Only pressing ESC could restore the auto-minimize behavior. The stuck state also persisted across page reloads.

After

Closing a panel via toggle re-click, click-outside, or ESC all behave the same: the dock collapses to the minimized dot after inactiveTimeout once the mouse leaves.

Test plan

• Toggle-close an entry → dock minimizes after 3s
• Click outside to close → dock minimizes after 3s
• ESC to close → dock minimizes after 3s

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