Remove Codex service tier option from settings, contracts, and turn dispatch by juliusmarminge · Pull Request #700

Remove Codex service tier option from settings, contracts, and turn dispatch by juliusmarminge · Pull Request #700 · pingdotgg/t3code

- Drop `serviceTier` from orchestration/provider contracts and server dispatch paths
- Remove service-tier app setting/UI and related resolver logic
- Keep fast badge behavior tied to explicit fast-mode boolean

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Mar 9, 2026

- delete `shouldShowFastTierIcon` and its test
- remove Zap icon badges from slash model commands and provider model picker
- simplify related ChatView props and memo dependencies