# Specification: Simulation Fidelity Enhancement

## Background
The `simulation/user_agent.py` currently relies on fixed random delays to simulate human typing. As identified in the architecture audit, this provides a low-fidelity simulation of actual user interactions, which may hide UI rendering glitches that only appear when ImGui is forced to render intermediate, hesitating states.

## Objective
Enhance the `UserSimAgent` to behave more like a human, introducing realistic jitter, hesitation, and reading delays.

## Requirements
1. **Variable Reading Latency:** Calculate artificial delays based on the length of the AI's response to simulate the user reading the text before clicking next.
2. **Typing Jitter:** Instead of just injecting text instantly, simulate keystrokes with slight random delays if testing input fields (optional, but good for stress testing the render loop).
3. **Hesitation Vectors:** Introduce a random chance for a longer "hesitation" delay (e.g., 2-5 seconds) before critical actions like "Approve Script".