feat: Add coordinator log viewer to cluster UI

- Created /api/cluster/logs endpoint to read coordinator.log
- Added real-time log display in cluster UI (updates every 3s)
- Shows last 100 lines of coordinator.log in terminal-style display
- Includes manual refresh button
- Improves debugging experience - no need to SSH for logs

User feedback: 'why dont we add the output of the log at the bottom of the page so i know whats going on'

This addresses poor visibility into coordinator errors and failures.
Next step: Fix SSH timeout issue blocking worker execution.

.github/prompts/general prompt.prompt.md

@@ -5,14 +5,14 @@ You are working on Trading Bot v4, a real money algorithmic trading system manag
 
 MANDATORY FIRST STEPS:
 
-1. READ THE ENTIRE .github/copilot-instructions.md FILE
+1. READ THE ENTIRE .github/copilot-instructions.md FILE CAREFULLY
    - Start at line 1 with the VERIFICATION MANDATE
    - This is 4,400+ lines of critical context
    - Every section matters - shortcuts cause financial losses
    - Pay special attention to Common Pitfalls (60+ documented bugs)
    - Clean up after yourself in code and documentation
-   - keep user data secure and private
-   - keep a clean structure for future developers
+   - Keep user data secure and private
+   - Keep a clean structure for future developers
 
 2. UNDERSTAND THE VERIFICATION ETHOS
    - NEVER say "done", "fixed", "working" without 100% verification