Stabilize the cold-launch deal animation

[austin-smith]

What Changed

• Hide fresh-board cards in the same state transaction that creates the deal.
• Publish stock and destination frames as one coherent SwiftUI preference snapshot.
• Tag each geometry snapshot with its board-deal event and reject stale generations, so identical redeals still republish current frames.
• Start fresh-deal flights from an explicit stock or above-board source only after the required geometry exists.
• Add regression coverage for atomic frame reduction, identical redeal geometry, and invalid deal sources.

Why

On a cold first launch with no saved game, the board could render before SwiftUI published complete geometry. Cards briefly appeared at their final positions, and a missing stock frame could make the deal originate from the top of the board. Identical redeals also preserve card IDs and positions, so their geometry must be distinguished by deal event rather than coordinates alone.

UI Changes

Eliminates the transient card flash, incorrect deal origin, and blank board after an unchanged redeal. There is no intended steady-state visual change.

Validation

• macOS Debug build succeeded.
• iOS Simulator Debug build succeeded.
• Full macOS suite: 607 tests executed, 10 skipped, 0 failures.
• NewGameDealAnimationTests: 17 tests, 0 failures.
• git diff --check passed.
• Autoreview and TruffleHog completed cleanly with no actionable findings.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-31T22:22:16.826940Z	54776a8	Manual request

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: c62817fa1c

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[austin-smith]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. What shall we delve into next?

Reviewed commit: 54776a819b

ℹ️ About Codex in GitHub

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