initial commit: Proximity iOS app proposal, full Swift code scaffold, reference backend, testing docs, generated Xcode project

Proximity/Views/SilhouetteRow.swift

@@ -0,0 +1,74 @@
+import SwiftUI
+
+/// A single anonymous encounter in the feed.
+///
+/// Until mutual consent, the other person is a **silhouette** — a shape, not
+/// a profile. This visual language is the privacy promise made visible: you
+/// know a human was here, but you don't know who until they choose to be seen.
+struct SilhouetteRow: View {
+    let encounter: Encounter
+    /// Called when the user taps "Wave" on a silhouette.
+    var onWave: () -> Void
+
+    var body: some View {
+        HStack(spacing: 16) {
+            // Silhouette avatar — deliberately anonymous.
+            ZStack {
+                Circle()
+                    .fill(Color.gray.opacity(0.25))
+                    .frame(width: 48, height: 48)
+                Image(systemName: "person.fill")
+                    .foregroundColor(.gray)
+            }
+
+            VStack(alignment: .leading, spacing: 4) {
+                Text(title)
+                    .font(.headline)
+                Text(subtitle)
+                    .font(.caption)
+                    .foregroundColor(.secondary)
+            }
+
+            Spacer()
+
+            // Action depends on status.
+            switch encounter.status {
+            case .silhouette:
+                Button("Wave", action: onWave)
+                    .buttonStyle(.borderedProminent)
+                    .tint(.green)
+            case .waved:
+                Text("Waved ✓")
+                    .font(.caption)
+                    .foregroundColor(.green)
+            case .mutual:
+                Image(systemName: "checkmark.circle.fill")
+                    .foregroundColor(.green)
+            case .declined:
+                Image(systemName: "xmark.circle.fill")
+                    .foregroundColor(.red)
+            }
+        }
+        .padding()
+        .background(
+            RoundedRectangle(cornerRadius: 16)
+                .fill(Color(.secondarySystemBackground))
+        )
+    }
+
+    private var title: String {
+        switch encounter.status {
+        case .mutual:
+            return "Connected"
+        default:
+            return "Someone nearby"
+        }
+    }
+
+    private var subtitle: String {
+        var parts: [String] = [encounter.tier.title]
+        if let place = encounter.placeHint { parts.append(place) }
+        parts.append(encounter.timestamp.formatted(.relative(presentation: .named)))
+        return parts.joined(separator: " · ")
+    }
+}