Fix LED channel case inconsistency in ESP32LEDMatrixManager

[Copilot]

The ESP32LEDMatrixManager was setting channel_index = "led" (lowercase), causing it to fail case-sensitive comparisons for "LED" in ESP32LEDLaserManager.py and breaking LED channel recognition.

Changes

• Changed channel_index from "led" to "LED" in ESP32LEDMatrixManager.__init__() to match:
  • Case-sensitive equality checks in ESP32LEDLaserManager.setEnabled() (line 96) and setValue() (line 114)
  • Uppercase "LED" values in configuration files (example_histo_daheng.json, FRAME2b.json, example_uc2.json)

# Before
self.channel_index = "led"  # Would not match == "LED" checks

# After  
self.channel_index = "LED"  # Matches case-sensitive comparisons

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[Copilot]

Pull request overview

This PR fixes a bug where the ESP32LEDMatrixManager was setting channel_index to lowercase "led", causing it to fail case-sensitive string comparisons against uppercase "LED" in ESP32LEDLaserManager and other parts of the codebase.

Changes:

• Changed the hardcoded channel_index value from "led" to "LED" in ESP32LEDMatrixManager.__init__() to match case-sensitive equality checks used throughout the codebase

Comments suppressed due to low confidence (2)

imswitch/imcontrol/model/managers/LEDMatrixs/ESP32LEDMatrixManager.py:28

• Except block directly handles BaseException.

        except:

imswitch/imcontrol/model/managers/LEDMatrixs/ESP32LEDMatrixManager.py:36

• Except block directly handles BaseException.

        except:

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