fix: resolve ESLint errors blocking Docker build

- Remove unused formatDate() from park page (replaced by formatShortDate)
- Remove unused date prop from DayCell component
- Change let to const for cellBorderRadius in ParkCard
- Change let to const for bg in ParkMonthCalendar

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

app/park/[id]/page.tsx

@@ -121,12 +121,6 @@ export default async function ParkPage({ params, searchParams }: PageProps) {
 
 // ── Helpers ────────────────────────────────────────────────────────────────
 
-function formatDate(iso: string): string {
-  return new Date(iso + "T00:00:00").toLocaleDateString("en-US", {
-    weekday: "long", month: "long", day: "numeric",
-  });
-}
-
 function formatShortDate(iso: string): string {
   return new Date(iso + "T00:00:00").toLocaleDateString("en-US", {
     weekday: "short", month: "short", day: "numeric",

components/ParkCard.tsx

@@ -57,7 +57,7 @@ export function ParkCard({ park, weekDates, parkData, today }: ParkCardProps) {
 
           let cellBg = "transparent";
           let cellBorder = "1px solid var(--color-border-subtle)";
-          let cellBorderRadius = "6px";
+          const cellBorderRadius = "6px";
 
           if (isToday) {
             cellBg = "var(--color-today-bg)";

components/ParkMonthCalendar.tsx

@@ -139,7 +139,7 @@ export function ParkMonthCalendar({ parkId, year, month, monthData, today }: Par
               const isOpen = dayData?.isOpen && dayData?.hoursLabel;
               const isPH = dayData?.specialType === "passholder_preview";
 
-              let bg = isToday
+              const bg = isToday
                 ? "var(--color-today-bg)"
                 : isWeekend
                 ? "var(--color-weekend-header)"

components/WeekCalendar.tsx

@@ -28,12 +28,10 @@ function parseDate(iso: string) {
 }
 
 function DayCell({
-  date,
   dayData,
   isToday,
   isWeekend,
 }: {
-  date: string;
   dayData: DayData | undefined;
   isToday: boolean;
   isWeekend: boolean;
@@ -214,7 +212,6 @@ function ParkRow({
       {weekDates.map((date, i) => (
         <DayCell
           key={date}
-          date={date}
           dayData={parkData[date]}
           isToday={date === today}
           isWeekend={parsedDates[i].isWeekend}