feat: enforce custom Theme colors app-wide, add debug sample trips and poll

Replace all system colors (.secondary, Color(.secondarySystemBackground),
etc.) with Theme.textPrimary/textSecondary/textMuted/cardBackground/
surfaceGlow across 13 views. Remove PostHog debug logging. Add debug
settings for sample trips and hardcoded group poll preview.

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

SportsTime/Features/Polls/Views/PollVotingView.swift

@@ -34,17 +34,21 @@ struct PollVotingView: View {
                             onMoveDown: { viewModel.moveTripDown(at: index) }
                         )
                         .accessibilityHint("Drag to change ranking position, or use move up and move down buttons")
+                        .listRowBackground(Theme.cardBackground(colorScheme))
+                        .listRowSeparatorTint(Theme.surfaceGlow(colorScheme))
                     }
                     .onMove { source, destination in
                         viewModel.moveTrip(from: source, to: destination)
                     }
                 }
                 .listStyle(.plain)
+                .scrollContentBackground(.hidden)
                 .environment(\.editMode, .constant(.active))
 
                 // Submit button
                 submitButton
             }
+            .themedBackground()
             .navigationTitle("Rank Trips")
             .navigationBarTitleDisplayMode(.inline)
             .toolbar {
@@ -88,10 +92,11 @@ struct PollVotingView: View {
 
             Text("Drag to rank your preferences")
                 .font(.headline)
+                .foregroundStyle(Theme.textPrimary(colorScheme))
 
             Text("Your top choice should be at the top. You can drag, or use the move buttons.")
                 .font(.subheadline)
-                .foregroundStyle(.secondary)
+                .foregroundStyle(Theme.textSecondary(colorScheme))
         }
         .padding()
         .frame(maxWidth: .infinity)
@@ -130,6 +135,7 @@ struct PollVotingView: View {
 // MARK: - Ranking Row
 
 private struct RankingRow: View {
+    @Environment(\.colorScheme) private var colorScheme
     let rank: Int
     let trip: Trip
     let canMoveUp: Bool
@@ -150,10 +156,11 @@ private struct RankingRow: View {
             VStack(alignment: .leading, spacing: 2) {
                 Text(trip.displayName)
                     .font(.headline)
+                    .foregroundStyle(Theme.textPrimary(colorScheme))
 
                 Text(tripSummary)
                     .font(.caption)
-                    .foregroundStyle(.secondary)
+                    .foregroundStyle(Theme.textMuted(colorScheme))
             }
 
             Spacer()
@@ -175,7 +182,7 @@ private struct RankingRow: View {
                 .disabled(!canMoveDown)
                 .accessibilityLabel("Move \(trip.displayName) down")
             }
-            .foregroundStyle(.secondary)
+            .foregroundStyle(Theme.textSecondary(colorScheme))
         }
         .padding(.vertical, 4)
     }