WIP: Html view that prints to pdf ok.

Sources/ProjectClient/Internal/ManualDClient+frictionRate.swift

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+import DatabaseClient
+import Dependencies
+import ManualDClient
+import ManualDCore
+
+extension ManualDClient {
+
+  func frictionRate(projectID: Project.ID) async throws -> ProjectClient.FrictionRateResponse {
+    @Dependency(\.database) var database
+
+        let componentLosses = try await database.componentLoss.fetch(projectID)
+        let lengths = try await database.effectiveLength.fetchMax(projectID)
+
+        let equipmentInfo = try await database.equipment.fetch(projectID)
+        guard let staticPressure = equipmentInfo?.staticPressure else {
+          return .init(componentLosses: componentLosses, equivalentLengths: lengths)
+        }
+
+        guard let totalEquivalentLength = lengths.total else {
+          return .init(componentLosses: componentLosses, equivalentLengths: lengths)
+        }
+
+        return try await .init(
+          componentLosses: componentLosses,
+          equivalentLengths: lengths,
+          frictionRate: frictionRate(
+            .init(
+              externalStaticPressure: staticPressure,
+              componentPressureLosses: database.componentLoss.fetch(projectID),
+              totalEffectiveLength: Int(totalEquivalentLength)
+            )
+          )
+        )
+  }
+}