Open resolved history before checking the saved custom option

Once the last open decision is saved it moves into the collapsed resolved
history, so the final assertion only passed when it ran before the card
left the open list. The test now waits for "2 resolved", opens the
history, and checks the saved card there.

Assistant-model: Claude Opus 5.5
Assistant-workflow: inline
Assistant-duration: 9m converged, estimated 15m
Assistant-verification: Playwright Chromium E2E passed: sidecar "progressive custom answers" --repeat-each 10 (10 passed; before the fix 2 of 3 failed locally and all 3 CI attempts failed)
Assistant-verification: Playwright Chromium E2E passed: bun run e2e e2e/sidecar.e2e.ts e2e/shell.e2e.ts (52 passed)
Assistant-verification: typecheck and lint passed: bun run types, bun run ci
Co-authored-by: Alex Lavaee <lavaman131@github.com>