fix(a11y,sec): remove tabIndex=-1 from interactive buttons, npm audit fix

H-3: tabIndex=-1 removed from login info, settings reset, settings info buttons
      + aria-label added to each for screen reader discoverability
SEC: npm audit fix - 18 non-breaking dependency updates (34 vulns -> 16 remaining)
     Remaining 16 require --force (breaking changes, deferred)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/pages/auth/login/PasswordLoginForm.tsx

@@ -92,12 +92,12 @@ function UsernameHint({ server }: { server: string }) {
       }
     >
       <IconButton
-        tabIndex={-1}
         onClick={handleOpenMenu}
         type="button"
         variant="Background"
         size="300"
         radii="300"
+        aria-label="Username format hint"
         aria-pressed={!!anchor}
       >
         <Icon style={{ opacity: config.opacity.P300 }} size="100" src={Icons.Info} />