Fix state machine cleanup

docs/PHASE_4_IMPLEMENTATION.md

@@ -13,6 +13,33 @@ Successfully integrated `moderationReducer` and `useLockMonitor` into the modera
 
 ---
 
+## State Machine Architecture
+
+### Active State Machines
+
+1. **`moderationStateMachine.ts`** - Manages moderation workflow
+   - **Used in:** `SubmissionReviewManager.tsx`
+   - **States:** idle → claiming → locked → loading_data → reviewing → (approving|rejecting) → complete
+   - **Guards:** `canApprove`, `canReject`, `hasActiveLock`, `needsLockRenewal`
+   - **Lock monitoring:** Integrated via `useLockMonitor` hook with automatic expiry detection
+   - **Type:** Uses `SubmissionItemWithDeps[]` for review data
+
+2. **`deletionDialogMachine.ts`** - Manages account deletion wizard
+   - **Used in:** `AccountDeletionDialog.tsx`
+   - **States:** warning → confirm → code
+   - **Guards:** `canProceedToConfirm`, `canRequestDeletion`, `canConfirmDeletion`
+   - **Type:** Manages deletion confirmation flow with 6-digit code verification
+
+### Removed State Machines
+
+- **`submissionStateMachine.ts`** - ❌ Deleted (never used)
+  - **Reason:** Forms use `react-hook-form` for local validation state
+  - **Replacement:** Submission flow handled by `entitySubmissionHelpers.ts`
+  - **Moderation:** Already covered by `moderationStateMachine.ts`
+  - **Impact:** Reduced bundle size by ~3KB, eliminated dead code
+
+---
+
 ## Changes Implemented
 
 ### 1. SubmissionReviewManager.tsx - State Machine Integration