CardView is now just the read view -- header (inline back arrow +
card text) and its status badge, no tabs (there's nothing to tab
between). New CardConfigureView (/cards/:id/configure) holds the
"Edit text" form that used to live inline in CardView.
New CardManageMenu, mirroring ProjectManageMenu: a "Manage" dropdown
with "Configure" (hidden while already on the configure view) and
"Delete card" (with its own confirmation modal). Both CardView and
CardConfigureView use it in their header actions, same as the project
view and its own configure view.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>