Beta gate: art pass, QA, performance, release checklist

[BrandDead]

Take the stitched systems and make them presentable.

Scope

• Replace obvious placeholder visuals
• Add minimum viable asset pack for UI, icons, cards, units, and HUD
• Add smoke tests for auth, DEALT, SLIDE, map, and crew
• Add performance checks and error handling
• Add release checklist and staging validation
• Document known non-MVP deferrals

Acceptance Criteria

• Core gameplay loop is stable
• No blocker-level crashes in core modes
• Visuals are coherent enough for testers
• Release checklist exists and is checked off
• Deferred features are explicitly listed

Definition of Done

Build is fit for outside testers

Branch

feat/beta-crew-heat-npc-qa (same branch as Issues 7-9)

PR Title

feat(beta): crew stackapp heat npc gangs qa and art pass

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Execution Order

1. Issue 1 - MVP Foundation
2. Issue 2 - OS Shell
3. Issue 3 - DEALT Economy
4. Issue 4 - SLIDE Combat
5. Issue 5 - Territory Map
6. Issue 6 - Ops Layer
7. Issue 7 - Crew & Phone
8. Issue 8 - Heat & World Tick
9. Issue 9 - AI Gangs
10. Issue 10 - Beta Gate