Improve latency tracking and chapter detection

[mleem97]

Summary

• Reduce default action delay to 50ms
• Add OCR-based fallback to locate chapter headers, fixing Chapter 5 detection
• Expose last screenshot-to-action latency for UI display

Testing

• python -m py_compile $(git ls-files '*.py')

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https://chatgpt.com/codex/tasks/task_e_6897f5b70f48832fa0b30fff1bcc7695

[Copilot]

Pull Request Overview

This PR improves the Rush Royale bot's responsiveness and chapter detection reliability. The changes reduce action latency by decreasing the default delay between actions and add OCR-based fallback for detecting chapter headers when template matching fails.

• Reduced default action delay from 100ms to 50ms for better responsiveness
• Added OCR-based fallback to locate chapter headers, specifically addressing Chapter 5 detection issues
• Enhanced latency tracking by exposing the last screenshot-to-action timing for real-time UI monitoring

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
Src/ocr_utils.py	Adds new find_chapter_headers() function for OCR-based chapter detection
Src/latency.py	Adds tracking and getter for last screenshot-to-action latency measurement
Src/gui.py	Updates latency display to include the most recent timing measurement
Src/bot_core.py	Reduces default sleep delay and integrates OCR fallback for chapter detection