Deletes four screen-level .test.tsx files (2600+ lines of vi.mock + JSDOM
slop) and replaces each with verified coverage:
- sessions-screen.test.tsx: covered by archive-tab.spec.ts which exercises
the sessions screen via openSessions() with real agents
- workspace-draft-agent-tab.test.tsx: covered by new-workspace.spec.ts
"redirects to optimistic draft tab before agent creation resolves"
- new-workspace-screen.test.tsx: covered by new-workspace.spec.ts (main
submit, branch selection, PR selection, optimistic draft tab) plus
new-workspace-picker-item.test.ts (pickerItemToCheckoutRequest)
- project-settings-screen.test.tsx: covered by project-config-form.test.ts
(all round-trip string/array lifecycle semantics) and projects-settings.spec.ts
(save flow with passthrough field preservation)
Extracts syncPickerPrAttachment from new-workspace-screen.tsx into a new
pure module new-workspace-picker-state.ts with 5 zero-mock unit tests
covering: initial PR selection, branch selection without change, PR
replacement, PR removal on branch switch, and no-duplicate guard.