The sidebar menus (folder tree, view options) and the page menus (card,
bulk selection, page-global) are independent components that only knew
how to close themselves, so right-clicking a folder left an open card
menu next to the folder menu, and right-clicking a card left the folder
menu behind.
Add a coordinator where every menu registers a closer; opening a menu
first closes all the others. BaseContextMenu takes part automatically,
the sidebar registers its two menus, and the global contextmenu handler
now uses the coordinator instead of hiding three specific menus by hand
(which also covers right-clicks outside the content area).
Menus are `position: fixed`, so only the window can clip them, but they
were placed at the raw cursor position with a naive flip: near the bottom
edge the menu opened below the window (nothing to scroll it into view),
and a tall menu that flipped up could land above the top edge. The
sidebar folder menu and the view-options menu did no viewport math at all,
so right-clicking a folder at the bottom of the tree showed no options.
Add a shared positionFixedMenu helper that picks the side with room,
clamps on both axes, and caps the height (scrolling internally) when the
menu is taller than the window. BaseContextMenu uses it and exposes a
prepareMenu hook so per-card entries are toggled before the menu is
measured; the Recipe/Lora/Checkpoint/Embedding/Other/Workflow menus used
to mutate the menu after positioning and so measured the previous
content. Submenus get the same treatment via positionSubmenu.
Fixes#1167
Group 15 flat menu items into 5 logical sections (Workflow, Metadata,
Attributes, Organize, Download) with section headers to reduce cognitive
load. Nest the three workflow-related actions (Append, Replace, Copy
Syntax) into a single "Send to Workflow" hover-triggered submenu.
Add submenu infrastructure to BaseContextMenu with mouseover/mouseout
boundary detection, 250ms close delay, and viewport-aware positioning.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>