Feat: floating button to collapse right panel in launch view

[LaansDole]

Giving the canvas a larger view in case future implementation expands Canvas and Sprites animation

[zxrys]

Thanks for the contribution! One concern is that isRightPanelOpen defaults to false. As a result, the right panel disappears immediately when users first switch to Graph view, including the control for switching back to Chat view. Users then have to discover and understand the floating button in the bottom-right corner before they can restore the panel.
To preserve the existing default experience, could we initialize isRightPanelOpen to true and let users collapse the panel manually when they need more canvas space?

[zxrys]

To preserve the existing default experience, could we initialize isRightPanelOpen to true and let users collapse the panel manually when they need more canvas space?