Refine app structure for persisted sessions and test coverage

Sources/Core/Services/MockIDPService.swift

@@ -61,7 +61,7 @@ actor MockIDPService: IDPServicing {
         try await Task.sleep(for: .milliseconds(180))
 
         try validateSignedGPSPosition(in: request)
-        let context = try parsePayloadContext(from: request.pairingPayload)
+        let context = try PairingPayloadParser.parse(request.pairingPayload)
         notifications.insert(
             AppNotification(
                 title: "Identity proof completed",
@@ -186,7 +186,7 @@ actor MockIDPService: IDPServicing {
     }
 
     private func parseSession(from request: PairingAuthenticationRequest) throws -> AuthSession {
-        let context = try parsePayloadContext(from: request.pairingPayload)
+        let context = try PairingPayloadParser.parse(request.pairingPayload)
 
         return AuthSession(
             deviceName: context.deviceName,
@@ -199,33 +199,6 @@ actor MockIDPService: IDPServicing {
         )
     }
 
-    private func parsePayloadContext(from payload: String) throws -> PayloadContext {
-        if let components = URLComponents(string: payload),
-           components.scheme == "idp.global",
-           components.host == "pair" {
-            let queryItems = components.queryItems ?? []
-            let token = queryItems.first(where: { $0.name == "token" })?.value ?? "demo-token"
-            let origin = queryItems.first(where: { $0.name == "origin" })?.value ?? "code.foss.global"
-            let device = queryItems.first(where: { $0.name == "device" })?.value ?? "Web Session"
-
-            return PayloadContext(
-                deviceName: device,
-                originHost: origin,
-                tokenPreview: String(token.suffix(6))
-            )
-        }
-
-        if payload.contains("token") || payload.contains("pair") {
-            return PayloadContext(
-                deviceName: "Manual Session",
-                originHost: "code.foss.global",
-                tokenPreview: String(payload.suffix(6))
-            )
-        }
-
-        throw AppError.invalidPairingPayload
-    }
-
     private func pairingMessage(for session: AuthSession) -> String {
         let transportSummary: String
         switch session.pairingTransport {
@@ -246,7 +219,7 @@ actor MockIDPService: IDPServicing {
         return "\(session.deviceName) is now acting as a passport, \(transportSummary) against \(session.originHost)."
     }
 
-    private func identificationMessage(for context: PayloadContext, signedGPSPosition: SignedGPSPosition?) -> String {
+    private func identificationMessage(for context: PairingPayloadContext, signedGPSPosition: SignedGPSPosition?) -> String {
         if let signedGPSPosition {
             return "A signed GPS proof was sent for \(context.deviceName) on \(context.originHost) from \(signedGPSPosition.coordinateSummary) \(signedGPSPosition.accuracySummary)."
         }
@@ -254,12 +227,6 @@ actor MockIDPService: IDPServicing {
         return "An identity proof was completed for \(context.deviceName) on \(context.originHost)."
     }
 
-    private struct PayloadContext {
-        let deviceName: String
-        let originHost: String
-        let tokenPreview: String
-    }
-
     private static func seedRequests() -> [ApprovalRequest] {
         [
             ApprovalRequest(