perf(web): cap receipt simulation work

[xingkaixin]

Summary

• cap InteractiveReceipt physics and canvas work at 60 simulation frames per second
• stop idle simulation after 36 simulated frames instead of 90
• render a single static frame and disable drag hit testing for reduced motion
• extract and test the frame scheduling and settle policy

Impact

The receipt keeps its existing 18 by 42 mesh, constraint parameters, visual density, and pointer physics. On 120 Hz displays, simulation work is capped to half the prior rate. Idle simulation work is reduced by 60 percent, while reduced-motion users avoid continuous paper movement entirely.

Validation

• pnpm format
• pnpm lint
• pnpm format:check
• pnpm build
• pnpm test (665 tests)
• pnpm test:e2e (7 tests, including reduced motion)

Closes CS-47