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/features/settings/general/General.tsx

@@ -552,23 +552,23 @@ function DateHint({ hasChanges, handleReset }: DateHintProps) {
     >
       {hasChanges ? (
         <IconButton
-          tabIndex={-1}
           onClick={handleReset}
           type="reset"
           variant="Secondary"
           size="300"
           radii="300"
+          aria-label="Reset to default"
         >
           <Icon src={Icons.Cross} size="100" />
         </IconButton>
       ) : (
         <IconButton
-          tabIndex={-1}
           onClick={handleOpenMenu}
           type="button"
           variant="Secondary"
           size="300"
           radii="300"
+          aria-label="Setting info"
           aria-pressed={!!anchor}
         >
           <Icon style={{ opacity: config.opacity.P300 }} size="100" src={Icons.Info} />

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} />