fix: comprehensive codebase hardening — crashes, silent failures, performance, and security

Fixes ~95 issues from deep audit across 12 categories in 82 files:

- Crash prevention: double-resume in PhotoMetadataExtractor, force unwraps in
  DateRangePicker, array bounds checks in polls/achievements, ProGate hit-test
  bypass, Dictionary(uniqueKeysWithValues:) → uniquingKeysWith in 4 files
- Silent failure elimination: all 34 try? sites replaced with do/try/catch +
  logging (SavedTrip, TripDetailView, CanonicalSyncService, BootstrapService,
  CanonicalModels, CKModels, SportsTimeApp, and more)
- Performance: cached DateFormatters (7 files), O(1) team lookups via
  AppDataProvider, achievement definition dictionary, AnimatedBackground
  consolidated from 19 Tasks to 1, task cancellation in SharePreviewView
- Concurrency: UIKit drawing → MainActor.run, background fetch timeout guard,
  @MainActor on ThemeManager/AppearanceManager, SyncLogger read/write race fix
- Planning engine: game end time in travel feasibility, state-aware city
  normalization, exact city matching, DrivingConstraints parameter propagation
- IAP: unknown subscription states → expired, unverified transaction logging,
  entitlements updated before paywall dismiss, restore visible to all users
- Security: API key to Info.plist lookup, filename sanitization in PDF export,
  honest User-Agent, removed stale "Feels" analytics super properties
- Navigation: consolidated competing navigationDestination, boolean → value-based
- Testing: 8 sleep() → waitForExistence, duplicates extracted, Swift 6 compat
- Service bugs: infinite retry cap, duplicate achievement prevention, TOCTOU vote
  fix, PollVote.odg → voterId rename, deterministic placeholder IDs, parallel
  MKDirections, Sendable-safe POI struct

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

SportsTime/Features/Settings/DebugShareExporter.swift

@@ -223,13 +223,23 @@ final class DebugShareExporter {
 
             // Pick a few representative achievements across sports
             let defs = AchievementRegistry.all
-            let sampleDefs = [
-                defs.first { $0.sport == .mlb } ?? defs[0],
-                defs.first { $0.sport == .nba } ?? defs[1],
-                defs.first { $0.sport == .nhl } ?? defs[2],
-                defs.first { $0.name.lowercased().contains("complete") } ?? defs[3],
-                defs.first { $0.category == .journey } ?? defs[min(4, defs.count - 1)]
+            guard !defs.isEmpty else {
+                exportPath = exportDir.path
+                currentStep = "Export complete! (no achievements found)"
+                isExporting = false
+                return
+            }
+            let fallback = defs[0]
+            var sampleDefs: [AchievementDefinition] = [
+                defs.first { $0.sport == .mlb } ?? fallback,
+                defs.first { $0.sport == .nba } ?? fallback,
+                defs.first { $0.sport == .nhl } ?? fallback,
+                defs.first { $0.name.lowercased().contains("complete") } ?? fallback,
+                defs.first { $0.category == .journey } ?? fallback
             ]
+            // Deduplicate in case multiple fallbacks resolved to the same definition
+            var seen = Set<String>()
+            sampleDefs = sampleDefs.filter { seen.insert($0.id).inserted }
 
             totalCount = sampleDefs.count
 
@@ -407,9 +417,9 @@ final class DebugShareExporter {
     static func buildSamplePoll() -> TripPoll {
         let trips = buildDummyTrips()
         let sampleVotes = [
-            PollVote(pollId: UUID(), odg: "voter1", rankings: [0, 2, 1, 3]),
-            PollVote(pollId: UUID(), odg: "voter2", rankings: [2, 0, 3, 1]),
-            PollVote(pollId: UUID(), odg: "voter3", rankings: [0, 1, 2, 3]),
+            PollVote(pollId: UUID(), voterId: "voter1", rankings: [0, 2, 1, 3]),
+            PollVote(pollId: UUID(), voterId: "voter2", rankings: [2, 0, 3, 1]),
+            PollVote(pollId: UUID(), voterId: "voter3", rankings: [0, 1, 2, 3]),
         ]
         _ = sampleVotes // votes are shown via PollResults, we pass them separately
 
@@ -422,9 +432,9 @@ final class DebugShareExporter {
 
     static func buildSampleVotes(for poll: TripPoll) -> [PollVote] {
         [
-            PollVote(pollId: poll.id, odg: "voter-alex", rankings: [0, 2, 1, 3]),
-            PollVote(pollId: poll.id, odg: "voter-sam", rankings: [2, 0, 3, 1]),
-            PollVote(pollId: poll.id, odg: "voter-jordan", rankings: [0, 1, 2, 3]),
+            PollVote(pollId: poll.id, voterId: "voter-alex", rankings: [0, 2, 1, 3]),
+            PollVote(pollId: poll.id, voterId: "voter-sam", rankings: [2, 0, 3, 1]),
+            PollVote(pollId: poll.id, voterId: "voter-jordan", rankings: [0, 1, 2, 3]),
         ]
     }