🎨 Palette: Improve password toggle accessibility

[2fst4u]

💡 What: Replaced dynamic :aria-label attributes on the three password visibility toggle buttons (login, current password, new password) with inner visually hidden <span class="sr-only"> elements whose text updates dynamically via Alpine.js.

🎯 Why: To ensure screen readers explicitly announce the active state dynamically ("Show password" vs. "Hide password") and to improve internationalization, as standard aria-label attributes are frequently ignored by automated translation tools.

📸 Before/After: Visual layout remains completely unaffected.

♿ Accessibility: The active state of the icon-only toggle button is now robustly conveyed to screen readers and translation tools via actual DOM text content inside an .sr-only span.

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PR created automatically by Jules for task 4120395144574641318 started by @2fst4u

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