🎨 Palette: AppDiagnosticsView Micro-UX & Accessibility Improvements

[emkey1]

💡 What: Added withAnimation blocks around the state changes for the "Copied Report" transient text, and added explicit accessibilityLabel and accessibilityHint modifiers to the "Copy Report" and "Run Diagnostics" buttons in AppDiagnosticsView.
🎯 Why: Previously, the "Copied!" text would snap in and out abruptly, creating a jarring visual experience. Wrapping the state toggle in withAnimation provides a smooth cross-dissolve transition. Additionally, VoiceOver users lacked clear context for what the "Copy Report" and "Run Diagnostics" buttons did, especially regarding the transient success state. The new accessibility modifiers ensure the actions and their outcomes are clearly announced.
♿ Accessibility:

• Added .accessibilityLabel to dynamically read "Copied Report" when the copy action succeeds.
• Added .accessibilityHint to the copy button to clarify it copies the diagnostic report text to the clipboard.
• Added .accessibilityHint to the run button to clarify it executes the app's diagnostic sanity checks.

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PR created automatically by Jules for task 7435828072089591663 started by @emkey1

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