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

Proximity/Models/UserProfile.swift

@@ -0,0 +1,33 @@
+import Foundation
+
+/// The user's own local identity and preferences.
+///
+/// Deliberately minimal: Proximity collects the *least* data needed to connect
+/// humans. There is no profile photo, no bio, no social graph import.
+struct UserProfile: Codable {
+    var id: UUID
+    var displayName: String
+    var publicKey: Data
+
+    /// Master "open to connection" state.
+    var isOpenToConnect: Bool
+
+    /// Preferred radius tier.
+    var radiusTier: DistanceTier
+
+    /// When true, the user is present but invisible to others.
+    var isIncognito: Bool
+
+    /// When true, the user is not discoverable at all.
+    var isBlocked: Bool
+
+    static let empty = UserProfile(
+        id: UUID(),
+        displayName: "",
+        publicKey: Data(),
+        isOpenToConnect: false,
+        radiusTier: .rightHere,
+        isIncognito: false,
+        isBlocked: false
+    )
+}