🎨 Palette: Add explicit visual feedback for error state dismissal

[sl4m3]

💡 What: Added explicit visual feedback in the Output Channel when the user dismisses a persistent error state via the status bar. Replaced direct assignment of isError with the dedicated setError state updater for improved state-handling semantics.

🎯 Why: To improve the user experience by providing a reassuring confirmation in the logs that the error has been acknowledged and dismissed. Additionally, utilizing the correct state-handling method avoids relying on side-effect updates.

📸 Before/After: Before, dismissing an error via clicking the status bar silently reset the flag and refreshed the UI. After, clicking the status bar logs a clear visual indication ('✓ Error state cleared by user') if an error state was active.

♿ Accessibility: Ensures that users and screen readers navigating through the interaction logs receive confirmation of error resolution.

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PR created automatically by Jules for task 3710308784454865511 started by @sl4m3

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