fix(plan): always show notes for every record in a multi-record cell

Previously notes were hidden when a cell held 2-3 records (a density
choice). Show each record's note regardless of count — drop the
now-unused showNote prop on PlanRangeChips.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/components/PlanGrid.tsx

@@ -620,7 +620,6 @@ export default function PlanGrid({
                                 c.category,
                                 catMap,
                               )}
-                              showNote={cellArr.length === 1}
                             />
                           </Box>
                         ))}

src/admin/components/PlanRangeChips.tsx

@@ -6,7 +6,6 @@ interface Props {
   project: Project | null;
   readonly?: boolean;
   categoryLabel: string;
-  showNote?: boolean;
 }
 
 export default function PlanRangeChips({
@@ -14,7 +13,6 @@ export default function PlanRangeChips({
   project,
   readonly,
   categoryLabel,
-  showNote = true,
 }: Props) {
   void readonly;
   if (!cell) return null;
@@ -38,9 +36,7 @@ export default function PlanRangeChips({
           </span>
         )}
       </div>
-      {showNote && cell.note && (
+      {cell.note && <div className="plan-cell-note">{cell.note}</div>}
-        <div className="plan-cell-note">{cell.note}</div>
-      )}
     </div>
   );
 }