feat: AI marker system prompt fixes, TaskLane activation, and FlowPilot updates

- Fix system prompt to ensure [QUESTIONS]/[ACTIONS] markers in AI responses
- Add format reminder injection to user messages for marker compliance
- Wire TaskLane activation in prefill and resume paths
- Add ActionCardGroup component for structured question/action rendering
- Update FlowPilot session and step card components
- Update ai-session schemas and types for marker data

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.dev.yml

@@ -57,7 +57,7 @@ services:
       - ./frontend:/app
       - /app/node_modules
     environment:
-      - VITE_API_URL=https://dev.resolutionflow.com/api
+      - VITE_API_URL=https://dev.resolutionflow.com/
     depends_on:
       - backend
     labels: