🤖 tests: fix Pixel phone-viewport story failing on main

[ibetitsmike]

Summary

Fixes the Pixel commit status failing on main since #3923: the new ProjectCreateModal PhoneViewport story's play function timed out with Unable to find a label with the text of: Add project.

Background

#3923 added a Pixel phone-viewport story that opens the Add Project modal by clicking the sidebar's "Add project" button. The app auto-collapses the left sidebar when window.innerWidth <= 768, and the collapsed sidebar does not render that button. Only Pixel executes the play at the pinned 390px viewport (the Storybook test-runner ignores viewport globals and runs at desktop width), so PR CI stayed green while every Pixel build on main since cc633c9 reported "1 test failed" (build 1772).

Implementation

Adds an expandLeftSidebar() helper to stories/helpers/uiState.ts (mirroring the existing collapseLeftSidebar) and calls it in the shared setupProjectCreateStory(), following the same pattern ScratchPage stories already use for mobile-viewport plays. Expanded is the desktop default, so the two desktop stories are unaffected.

Validation

• Red-green via Storybook + agent-browser at a 390x844 viewport: without the fix the "Add project" button and dialog never appear (the exact CI failure); with it the dialog opens showing all three modes wrapping within the narrow dialog.
• Re-checked the desktop LocalFolder/CloneRepo stories still open the dialog at 1200px.
• make static-check passes.

Note: tests/ui/storybook/budget.test.ts fails on clean main already (budget drifted; CI never runs that file, it is jest-ignored and outside the CI unit-test find src glob). This change adds no stories or matrix variants, so it does not move those counts.

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Generated with xum • Model: anthropic:claude-fable-5 • Thinking: xhigh

[ibetitsmike]

@codex review

[chatgpt-codex-connector]

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Reviewed commit: f2eda69300

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[ibetitsmike]

@codex review

Addressed both findings: expandLeftSidebar now routes through updatePersistedState, and the helper comment no longer repeats the numeric breakpoint.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Swish!

Reviewed commit: 24b2e9ee69

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