Merge pull request 'Redline: OneDrive folder transport as alternative to AirDrop (MMDB-2631)' (#23) from feat/redline-onedrive-transport-20260905 into main

Merge pull request #23: Redline: OneDrive folder transport as alternative to AirDrop (MMDB-2631)

Sources/Shotdeck/main.swift

@@ -7,6 +7,9 @@ import ShotdeckCore
 if ProcessInfo.processInfo.environment["SHOTDECK_SNAPSHOT_DIR"] != nil {
     MainActor.assumeIsolated { PanelSnapshot.runIfRequested() }
 }
+if ProcessInfo.processInfo.environment["REDLINE_SELFTEST_PHASE"] == "onedrive" {
+    MainActor.assumeIsolated { PickerSelfTest.runOneDriveOnlyIfRequested() }
+}
 if ProcessInfo.processInfo.environment["SHOTDECK_PICKER_SELFTEST"] != nil {
     MainActor.assumeIsolated { PickerSelfTest.runIfRequested() }
 }
@@ -71,9 +74,18 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
         Task { await model.bootstrap() }
     }
 
-    private static func makeLaunchModel() -> AppModel {
+    /// Builds the model exactly the way the real app launches: paths come from
+    /// `TransportSettings.resolvedAppSupportPaths()` — transport-aware, so the watcher
+    /// this feeds is never seeded with a stale AirDrop folder while OneDrive is the
+    /// persisted transport (that was the BLOCKER this function used to have, when it
+    /// called the AirDrop-only `FolderSettings.resolvedAppSupportPaths()` instead).
+    /// `appSupportRoot` exists only so PickerSelfTest's relaunch-simulation sub-step can
+    /// point this at a temp directory instead of the real
+    /// ~/Library/Application Support/Shotdeck — production always calls this with no
+    /// argument (the real root). Internal, not private, for that same reason.
+    static func makeLaunchModel(appSupportRoot: URL? = nil) -> AppModel {
         do {
-            let paths = try FolderSettings.resolvedAppSupportPaths()
+            let paths = try TransportSettings.resolvedAppSupportPaths(root: appSupportRoot)
             return try makeModel(paths: paths)
         } catch {
             Log.ui.critical(