WIP: Attempt at breaking out some logic / middleware between database and view layer, to remove some code from the view controller. Not complete, maybe revert.

Sources/ProjectClient/Interface.swift

@@ -0,0 +1,35 @@
+import Dependencies
+import DependenciesMacros
+import ManualDCore
+
+extension DependencyValues {
+  public var projectClient: ProjectClient {
+    get { self[ProjectClient.self] }
+    set { self[ProjectClient.self] = newValue }
+  }
+}
+
+@DependencyClient
+public struct ProjectClient: Sendable {
+  public var calculateDuctSizes: @Sendable (Project.ID) async throws -> ProjectResponse
+}
+
+extension ProjectClient: TestDependencyKey {
+  public static let testValue = Self()
+}
+
+extension ProjectClient {
+
+  public struct ProjectResponse: Codable, Equatable, Sendable {
+    public let rooms: [DuctSizing.RoomContainer]
+    public let trunks: [DuctSizing.TrunkContainer]
+
+    public init(
+      rooms: [DuctSizing.RoomContainer],
+      trunks: [DuctSizing.TrunkContainer]
+    ) {
+      self.rooms = rooms
+      self.trunks = trunks
+    }
+  }
+}