🎨 Palette: Add ARIA status role to dynamic informational cards

[LaKanDoR]

💡 What: Added role="status" to the dynamically generated informational cards for manual URL scans and manual file uploads.
🎯 Why: These cards are injected into the DOM after an asynchronous operation (e.g., retrieving from IndexedDB). Without a live region role, screen readers do not automatically announce their presence, leaving visually impaired users unaware that an operation has completed with a manual action required.
📸 Before/After: Visuals remain unchanged. Assistive technology now reads the informational card automatically upon generation.
♿ Accessibility: Ensures that dynamically injected informational content is proactively announced by screen readers, improving the accessibility of the extension's empty/informational states.

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PR created automatically by Jules for task 16136184821882274518 started by @LaKanDoR

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