feat: redesign all share cards, remove unused achievement types, fix sport selector

Redesign trip, progress, and achievement share cards with premium
sports-media aesthetic. Remove unused milestone/context achievement card
types (only used in debug exporter). Fix gold text unreadable in light
mode. Fix sport selector to only show stroke on selected sport.

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

SportsTime/Features/Settings/Views/SettingsView.swift

@@ -360,6 +360,33 @@ struct SettingsView: View {
                 Label("Export All Shareables", systemImage: "square.and.arrow.up.on.square")
             }
 
+            Button {
+                showExportProgress = true
+                Task {
+                    await exporter.exportAchievementSamples()
+                }
+            } label: {
+                Label("Export Achievement Samples", systemImage: "paintbrush")
+            }
+
+            Button {
+                showExportProgress = true
+                Task {
+                    await exporter.exportProgressSamples()
+                }
+            } label: {
+                Label("Export Progress Samples", systemImage: "chart.bar.fill")
+            }
+
+            Button {
+                showExportProgress = true
+                Task {
+                    await exporter.exportTripSamples()
+                }
+            } label: {
+                Label("Export Trip Samples", systemImage: "car.fill")
+            }
+
             Button {
                 Task { await exporter.addAllStadiumVisits(modelContext: modelContext) }
             } label: {