rebase: add import ScarfCore to templates feature Mac files

The v2.2.0 templates/config/catalog feature (introduced on main after
M0 branched) added 18 Mac-target files that reference types now living
in ScarfCore — ServerContext, ProjectEntry, ProjectDashboardService,
etc. After rebasing scarf-mobile-development onto main, those files
need `import ScarfCore` the same way the M0a/M0c/M0d extractions
added it to the ~100 pre-existing Mac files.

Unblocks Xcode compile of the scarf (Mac) target on this branch; no
behavior change.

https://claude.ai/code/session_019yMRP6mwZWfzVrPTqevx2y

scarf/scarf/Core/Models/ProjectTemplate.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 
 // MARK: - Manifest (what lives inside the .scarftemplate zip)
 

scarf/scarf/Core/Models/TemplateConfig.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 
 // MARK: - Schema (ships inside template.json as manifest.config)
 

scarf/scarf/Core/Services/ProjectConfigService.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Per-project configuration I/O: reads `<project>/.scarf/config.json`

scarf/scarf/Core/Services/ProjectTemplateExporter.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Builds a `.scarftemplate` bundle from an existing Scarf project plus the

scarf/scarf/Core/Services/ProjectTemplateInstaller.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Executes a `TemplateInstallPlan`. All writes happen in one pass with

scarf/scarf/Core/Services/ProjectTemplateService.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Reads, validates, and plans the install of a `.scarftemplate` bundle. Pure

scarf/scarf/Core/Services/ProjectTemplateUninstaller.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Reverses the work of `ProjectTemplateInstaller`, driven by the

scarf/scarf/Features/Templates/ViewModels/TemplateConfigEditorViewModel.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Observation
+import ScarfCore
 import os
 
 /// Drives the post-install "Configuration" button on the project

scarf/scarf/Features/Templates/ViewModels/TemplateConfigViewModel.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Observation
+import ScarfCore
 import os
 
 /// Drives the configure form for template install + post-install editing.

scarf/scarf/Features/Templates/ViewModels/TemplateExporterViewModel.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Drives the template export sheet. Holds form state for the author-facing

scarf/scarf/Features/Templates/ViewModels/TemplateInstallerViewModel.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Drives the template install sheet. Handles three entry points:

scarf/scarf/Features/Templates/ViewModels/TemplateUninstallerViewModel.swift

@@ -1,4 +1,5 @@
 import Foundation
+import ScarfCore
 import os
 
 /// Drives the template-uninstall sheet. Mirrors the installer VM in

scarf/scarf/Features/Templates/Views/ConfigEditorSheet.swift

@@ -1,3 +1,4 @@
+import ScarfCore
 import SwiftUI
 
 /// Post-install configuration editor. Thin wrapper around the same

scarf/scarf/Features/Templates/Views/TemplateConfigSheet.swift

@@ -1,3 +1,4 @@
+import ScarfCore
 import SwiftUI
 
 /// The configure form rendered for template install + post-install

scarf/scarf/Features/Templates/Views/TemplateInstallSheet.swift

@@ -1,5 +1,6 @@
-import SwiftUI
 import AppKit
+import ScarfCore
+import SwiftUI
 
 /// Preview-and-confirm sheet for installing a `.scarftemplate`. Honest
 /// accounting: shows every file that will be written, every cron job that

scarf/scarf/Features/Templates/Views/TemplateUninstallSheet.swift

@@ -1,3 +1,4 @@
+import ScarfCore
 import SwiftUI
 
 /// Preview-and-confirm sheet for uninstalling a template-installed

scarf/scarfTests/ProjectTemplateTests.swift

@@ -1,5 +1,6 @@
 import Testing
 import Foundation
+import ScarfCore
 @testable import scarf
 
 /// Cross-suite serialization lock for tests that touch the real

scarf/scarfTests/TemplateConfigTests.swift

@@ -1,5 +1,6 @@
 import Testing
 import Foundation
+import ScarfCore
 @testable import scarf
 
 // MARK: - Schema validation