refactor: replace robot3 with local useReducer-based state machine - #2555
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…e machine Replace the external robot3 (v1.2.0) and react-robot (v1.2.1) dependencies with a local state machine library built on React's useReducer. This resolves machine lifecycle issues causing partner bugs (AMEX, BQE) where robot3's interpreter mishandled machine identity changes and silently swallowed events. The new implementation at src/lib/state-machine/ provides the same DSL (state, transition, guard, reduce, createMachine) with: - useReducer as the React integration (no mutable service objects) - Dev-mode console.warn for unhandled events (robot3 swallowed silently) - Clean re-initialization when machine reference changes - Zero external dependencies Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Rename single-letter loop variables in applyTransition for clarity (t→candidate, r→reducer, t→def). Rename ApplyResult→TransitionResult. Migrate 8 files added on main that still imported from robot3/react-robot. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
robot3(v1.2.0) andreact-robot(v1.2.1) with a local state machine library atsrc/lib/state-machine/useReducer, eliminating mutable service objects and manual re-render tricksconsole.warnfor unhandled events (robot3 swallowed silently)Test plan
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