🎨 Palette: Contextual ARIA labels for exercise action buttons

[longestmt]

💡 What: Added specific, contextual aria-label attributes to the icon-only action buttons (History, Swap, 1RM, Plates, Note) inside exercise cards on the active workout view, and explicitly hid their inner SVG icons from screen readers.

🎯 Why: Generic icon-only action buttons inside repeated list items or grids create ambiguity for screen reader users, because they don't know which specific item the action applies to (e.g. "History" vs "History for Squat"). Adding explicit, interpolated context prevents this ambiguity.

📸 Before/After: Visually identical (no screenshot attached).

♿ Accessibility: Significantly improves screen reader navigation by ensuring all interactive elements have uniquely identifiable names and that decorative SVGs do not create ghost tab stops.

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PR created automatically by Jules for task 12008285656433576016 started by @longestmt

[google-labs-jules]

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