On mobile the "create page" action is triggered from inside the off-canvas
sidebar drawer (the space sidebar "+" and temporary-note buttons, and the
tree-row "add subpage"). handleCreate navigated to the new page's editor route
but never closed that drawer, so it stayed open on top of the freshly created
page — the editor was hidden behind the page tree ("as if the page didn't
open", #325 item 5).
Close the mobile sidebar (`setMobileSidebar(false)`) right after navigating,
mirroring the existing drawer-close on a tree-row tap (space-tree-row). Placing
it in handleCreate covers all three create entry points in one spot. It is a
no-op on desktop, where the mobile-sidebar atom is already false and only
governs the sub-992px collapsed state — desktop behavior is unchanged.
Verified: `tsc --noEmit` clean; client vitest 887 passed | 1 expected-fail.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
claude code agent 227