fix(display): use stadium timezone for all game time displays

Game times were incorrectly using device timezone in several views.
Now all game time displays use the stadium's local timezone via
RichGame.localGameTime/localGameTimeShort properties.

Fixes:
- PDFGenerator: was using game.gameDate (midnight UTC) instead of actual time
- GameRowCompact: was formatting with device timezone
- TimelineGameRow: was using .formatted() with device timezone

Also adds Date+GameTime.swift extension for centralized timezone formatting.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Core/Extensions/Date+GameTime.swift

@@ -0,0 +1,70 @@
+//
+//  Date+GameTime.swift
+//  SportsTime
+//
+//  Centralized game time formatting with timezone support.
+//
+
+import Foundation
+
+extension Date {
+
+    /// Formats the date as a game time string in the specified timezone.
+    ///
+    /// - Parameters:
+    ///   - timeZone: The timezone to display the time in (typically the stadium's timezone).
+    ///               Falls back to the device's current timezone if nil.
+    ///   - includeZone: Whether to include the timezone abbreviation (e.g., "EDT", "PST").
+    /// - Returns: A formatted time string like "7:00 PM" or "7:00 PM EDT".
+    ///
+    /// Usage:
+    /// ```swift
+    /// // Without timezone indicator (for UI cards)
+    /// game.dateTime.gameTimeString(in: stadium.timeZone)  // "7:00 PM"
+    ///
+    /// // With timezone indicator (for exports, detail views)
+    /// game.dateTime.gameTimeString(in: stadium.timeZone, includeZone: true)  // "7:00 PM EDT"
+    /// ```
+    func gameTimeString(in timeZone: TimeZone?, includeZone: Bool = false) -> String {
+        let formatter = DateFormatter()
+        formatter.dateFormat = includeZone ? "h:mm a z" : "h:mm a"
+        formatter.timeZone = timeZone ?? .current
+        return formatter.string(from: self)
+    }
+
+    /// Formats the date as a full game date and time string in the specified timezone.
+    ///
+    /// - Parameters:
+    ///   - timeZone: The timezone to display in (typically the stadium's timezone).
+    ///   - includeZone: Whether to include the timezone abbreviation.
+    /// - Returns: A formatted string like "Sat, Jan 18 at 7:00 PM" or "Sat, Jan 18 at 7:00 PM EDT".
+    func gameDateTimeString(in timeZone: TimeZone?, includeZone: Bool = false) -> String {
+        let formatter = DateFormatter()
+        formatter.dateFormat = includeZone ? "EEE, MMM d 'at' h:mm a z" : "EEE, MMM d 'at' h:mm a"
+        formatter.timeZone = timeZone ?? .current
+        return formatter.string(from: self)
+    }
+
+    /// Returns the start of day in the specified timezone.
+    ///
+    /// This is useful for grouping games by calendar day in the stadium's local timezone,
+    /// not the user's device timezone.
+    ///
+    /// - Parameter timeZone: The timezone to calculate start of day in.
+    /// - Returns: A Date representing midnight in the specified timezone.
+    func startOfDay(in timeZone: TimeZone?) -> Date {
+        var calendar = Calendar.current
+        calendar.timeZone = timeZone ?? .current
+        return calendar.startOfDay(for: self)
+    }
+
+    /// Returns the calendar day components in the specified timezone.
+    ///
+    /// - Parameter timeZone: The timezone to extract components in.
+    /// - Returns: DateComponents with year, month, and day.
+    func calendarDay(in timeZone: TimeZone?) -> DateComponents {
+        var calendar = Calendar.current
+        calendar.timeZone = timeZone ?? .current
+        return calendar.dateComponents([.year, .month, .day], from: self)
+    }
+}

SportsTime/Export/PDFGenerator.swift

@@ -562,10 +562,8 @@ final class PDFGenerator {
         ]
         (teamsText as NSString).draw(at: CGPoint(x: margin + 14, y: currentY), withAttributes: teamsAttributes)
 
-        // Time: "7:00 PM"
-        let timeFormatter = DateFormatter()
-        timeFormatter.dateFormat = "h:mm a"  // "7:00 PM"
-        let timeText = timeFormatter.string(from: richGame.game.gameDate)
+        // Time: "7:00 PM EDT" (stadium local time with timezone indicator)
+        let timeText = richGame.localGameTime
         let timeAttributes: [NSAttributedString.Key: Any] = [
             .font: UIFont.systemFont(ofSize: 13),
             .foregroundColor: textSecondary

SportsTime/Features/Trip/Views/ItineraryTableViewController.swift

@@ -1118,9 +1118,7 @@ struct GameRowCompact: View {
     let colorScheme: ColorScheme
     
     private var formattedTime: String {
-        let formatter = DateFormatter()
-        formatter.dateFormat = "h:mm a"  // "8:00 PM"
-        return formatter.string(from: richGame.game.dateTime)
+        richGame.localGameTimeShort  // Stadium local time
     }
     
     var body: some View {

SportsTime/Features/Trip/Views/TimelineItemView.swift

@@ -270,9 +270,9 @@ struct TimelineGameRow: View {
                     .font(.subheadline)
                     .fontWeight(.medium)
 
-                // Time and venue
+                // Time and venue (stadium local time)
                 HStack(spacing: 4) {
-                    Text(richGame.game.dateTime.formatted(date: .omitted, time: .shortened))
+                    Text(richGame.localGameTimeShort)
                     Text("•")
                     Text(richGame.stadium.name)
                 }