fix(next): the Starred models gallery state is a new chat (composer-type-scale base red)
Problem
composer-type-scale.test.ts "agent-pane.composer model-menu-starred draws its text on the type scale" fails at the base (cmux-next web push run 39359066751), so every webviews PR inherits it:
"the play did not run: play: no element for option \"Starred\""
#22226 fixed a started chat's harness: its model menu has no rail, so no Starred tab (ModelPicker.tsx, {!harnessFixed && (<ScrollArea ... rail>)}). The composer gallery's model-menu-starred state still drew a finished chat (chat(finished, ...), turnCount > 0, so locked in ComposerPickers.tsx). Its play typed and starred Sonnet, then found no Starred tab.
Change
composer.gallery.ts: model-menu-starred opens a new chat (ready: { newSession: true }, noChat(...), the same shape as new-chat), where the rail and its Starred tab live. The note says why. No product code changes; the menu is right.
Testing
On Huge Blue, CMUX_BROWSER_TESTS=1 bun test test/composer-type-scale.test.ts:
- Base ec0248b769b8,
-t model-menu-starred: 1 fail, the error above. - Head:
-t model-menu-starred1 pass; the whole file 41 pass, 0 fail.
Observed / Not run
Observed: the runs above. Not run: the app; this is a gallery-fixture-only change. CI runs the rest of the web suite.
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Summary by cubic
Fixes the composer-type-scale base red by changing the model-menu-starred gallery state to open a new chat, where the model picker's rail and Starred tab exist.
The previous state drew a finished chat; #22226 fixed a started chat's harness so its model menu has no rail, leaving no Starred option for the test to find. This updates the gallery fixture only (same shape as new-chat), with no product code changes.