Allow users to resize the custom panel by dragging a handle on its left
edge, matching the chat panel's resize UX. The panel width is persisted
via PersistenceRegistry so it survives page reloads.
Architectural changes:
- Split CustomPanel into container (resize/close) + CustomPanelContent (branding override)
- Split functions.ts into core functions + functions.custom.ts (branding override)
- Split middleware.web.ts into orchestrator + middleware.custom.web.ts (branding override)
- Chat max size now accounts for custom panel width for mutual awareness
test-localStorage1.html
The panel will appear on the right side after the participant pane panel. Currently the panel is disabled by default and the components that are rendered in the panel are empty (null). The panel is easily customizable by adding some content in the CustomPanel component.
