docs(prototype): add safe_intent_repair to action enum

https://claude.ai/code/session_01WtQrEmTYmoUheaP49HAei7

Author: claude

website/public/prototype-stage-flow.html

@@ -4624,7 +4624,7 @@ <h3>enforced by</h3>
       intent: "string · the intent slug (e.g. `add-billing`)",
     },
     output: {
-      action: "string · lifecycle: `select_studio` | `start_stage` | `elaborate` | `start_unit` | `continue_unit` | `start_units` | `review` | `review_elaboration` | `gate_review` | `advance_phase` | `advance_stage` | `intent_approved` | `intent_complete` | `complete` | `composite_run_stage` | `fix_quality_gates` | `changes_requested` | `external_review_requested` | `awaiting_external_review` · blocked: `design_direction_required` | `blocked` | `outputs_missing` | `discovery_missing` | `elaboration_insufficient` | `spec_validation_failed` | `unresolved_dependencies` | `dag_cycle_detected` | `unit_naming_invalid` | `unit_inputs_missing` | `inputs_missing` | `gate_blocked` | `error`",
+      action: "string · lifecycle: `select_studio` | `start_stage` | `elaborate` | `start_unit` | `continue_unit` | `start_units` | `review` | `review_elaboration` | `gate_review` | `advance_phase` | `advance_stage` | `intent_approved` | `intent_complete` | `complete` | `composite_run_stage` | `safe_intent_repair` | `fix_quality_gates` | `changes_requested` | `external_review_requested` | `awaiting_external_review` · blocked: `design_direction_required` | `blocked` | `outputs_missing` | `discovery_missing` | `elaboration_insufficient` | `spec_validation_failed` | `unresolved_dependencies` | `dag_cycle_detected` | `unit_naming_invalid` | `unit_inputs_missing` | `inputs_missing` | `gate_blocked` | `error`",
       context: "object · action-specific payload (next phase, hat, units, gate context, etc. — see the per-transition pills throughout this diagram)",
     },
     writes: ["Depends on the action returned. Click any of the labeled `haiku_run_next` pills above to see the exact `state.json` / `intent.md` / unit-frontmatter mutations for that specific tick."],