fix: react-doctor small categories 68→72 (a11y+perf+style, 21 fixes)

- no-outline-none (2): add focus-visible outline to inline-styled inputs
- no-redundant-roles (2): drop role="list" on <ul>
- click-events-have-key-events (2): convert div backdrops to buttons
- no-static-element-interactions (2): add role+tabIndex+onKeyDown to clickable divs
- rendering-svg-precision (2): round SVG path decimals
- no-tiny-text (2): 11px → 12px on CommandPalette hints
- js-set-map-lookups (4→1): Sets for visibleItems, regex for keyword match
- no-gray-on-colored-background (4): use color-matched text instead of stone-400/900
- no-transition-all (4): list specific properties in transition shorthand

src/components/admin/SideNavGroup.tsx

@@ -41,7 +41,7 @@ export default function SideNavGroup({
           </span>
         </div>
       )}
-      <ul className="space-y-1" role="list" hidden={collapsed}>
+      <ul className="space-y-1" hidden={collapsed}>
         {children}
       </ul>
     </section>