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/HarvestReach/SegmentListSidebar.tsx

@@ -89,7 +89,15 @@ export default function SegmentListSidebar({ segments, activeSegmentId, onSelect
               </div>
             ) : (
               <div
+                role="button"
+                tabIndex={0}
                 onClick={() => onSelect(segment)}
+                onKeyDown={(e) => {
+                  if (e.key === "Enter" || e.key === " ") {
+                    e.preventDefault();
+                    onSelect(segment);
+                  }
+                }}
                 className={`px-3 py-2.5 rounded-xl cursor-pointer flex items-center justify-between gap-2 transition-all ${
                   activeSegmentId === segment.id
                     ? "bg-[var(--admin-accent-light)] border border-[var(--admin-accent)]"