The model row is a Radix sub-trigger (no onSelect), so switching was
pointer-only. Wire Enter/Space alongside onClick so keyboard users can switch
models too.
- selectModel reports success; edits bail (and roll back) instead of landing
on the previously active model when a switch fails
- Fast toggle stays available to turn off a carried-over speed param even when
the new model has no native fast mechanism
- active row's "Fast" label derives from the same fastControl as the submenu
toggle, so it's consistent and handles standalone `-fast` model ids
Replace the status-bar model chip's modal with a Cursor-style dropdown:
- providers grouped by name in a stable order (no recency reshuffle on select)
- per-model hover-Edit submenu for reasoning effort + fast, gated by per-model
capabilities now surfaced in the model.options payload
- unified Fast toggle: flips the speed=fast param where supported, else swaps
to the model's `-fast` variant (base and variant collapse into one row)
- localStorage-backed "Edit Models" dialog to choose which models appear
Adds reusable dropdown primitives (DropdownMenuSearch, shared row/label
tokens, portaled + collision-aware submenus) and reads session state from
nanostores rather than prop-drilling, so editing options doesn't rebuild and
close the menu.