Add Stadium Progress system and themed loading spinners

Stadium Progress & Achievements:
- Add StadiumVisit and Achievement SwiftData models
- Create Progress tab with interactive map view
- Implement photo-based visit import with GPS/date matching
- Add achievement badges (count-based, regional, journey)
- Create shareable progress cards for social media
- Add canonical data infrastructure (stadium identities, team aliases)
- Implement score resolution from free APIs (MLB, NBA, NHL stats)

UI Improvements:
- Add ThemedSpinner and ThemedSpinnerCompact components
- Replace all ProgressView() with themed spinners throughout app
- Fix sport selection state not persisting when navigating away

Bug Fixes:
- Fix Coast to Coast trips showing only 1 city (validation issue)
- Fix stadium progress showing 0/0 (filtering issue)
- Remove "Stadium Quest" title from progress view

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

SportsTimeTests/SportsTimeTests.swift

@@ -53,7 +53,8 @@ struct DayCardTests {
             state: "ST",
             latitude: 40.0,
             longitude: -100.0,
-            capacity: 40000
+            capacity: 40000,
+            sport: game.sport
         )
         return RichGame(game: game, homeTeam: homeTeam, awayTeam: awayTeam, stadium: stadium)
     }
@@ -350,7 +351,7 @@ struct DayCardTests {
 /// Tests for handling duplicate game IDs without crashing (regression test for fatal error)
 struct DuplicateGameIdTests {
 
-    private func makeStadium() -> Stadium {
+    private func makeStadium(sport: Sport = .mlb) -> Stadium {
         Stadium(
             id: UUID(),
             name: "Test Stadium",
@@ -358,7 +359,8 @@ struct DuplicateGameIdTests {
             state: "TS",
             latitude: 40.0,
             longitude: -100.0,
-            capacity: 40000
+            capacity: 40000,
+            sport: sport
         )
     }