- Changed patrol schedule from preset dropdown to freeform number input
- Users can now set any interval (min 10 minutes, max 7 days, or 0 to disable)
- Added patrol_interval_minutes to API request/response (preset is now deprecated)
- Backend validates: min 10 minutes when enabled, max 10080 (7 days)
- Frontend shows human-readable duration next to input (e.g., '6h', '2h 30m')
Also improved Auto-Fix Mode safety:
- Removed '(recommended)' from preset options (was subjective)
- Added 'I understand the risks' acknowledgement checkbox
- Toggle is disabled until user explicitly acknowledges the risks
- Shows prominent warning when Auto-Fix is enabled
- Acknowledgement is session-based (must re-acknowledge on page reload)
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