[onevcat]

Closes #787.

What

• Export com.onevcat.prowl.workflow (conforms to com.apple.package, extension pwlworkflow).
• Add the matching CFBundleDocumentTypes entry.
• Icon: system-generated document icon (CFBundleTypeIconSystemGenerated + UTTypeIconText). Finder composes the page, the Prowl app icon, and the label "WORKFLOW". No icon asset is added, so the icon follows the app icon and the system icon style.
• The bundle layout does not change.

Decision: role None

Prowl has no handler for an opened workflow bundle. The document type has the role None, so Launch Services does not bind Prowl as the opener. A double-click in Finder reports that no application is set to open the item. With Viewer or Editor, a double-click brings Prowl forward and does nothing.

Change the role together with the preview/import entry point when that work is done. A test guards the role.

Audit of Open/Reveal actions

No code change is necessary.

• Open Workflow (Settings detail, after New Workflow) opens <bundle>/workflow.yaml, not the bundle.
• Reveal (list row, detail, bundle review) uses activateFileViewerSelecting, which selects the package in Finder.
• Discovery, snapshots, and the watcher use plain FileManager calls with no package-aware options.

Verification

• Registered the Debug build with lsregister -f. A .pwlworkflow directory reports isPackage: true, content type com.onevcat.prowl.workflow, description "Prowl Workflow", and no default application.
• Rendered the Finder icon through QLThumbnailGenerator (.icon): page + Prowl icon + "WORKFLOW".
• open <bundle> fails with kLSApplicationNotFoundErr; Prowl does not start.
• prowl workflow validate reads a bundle as before.
• WorkflowDocumentTypeTests, WorkflowsSettingsFeatureTests, WorkflowSettingsDetailFeatureTests: 23 passed. make check and make build-app pass.

Not done: the full make test suite, and a visual check in a Finder window.

Notes

• Icon Services caches the composed icon by type. After a change to UTTypeIcons, a registered machine can show the old icon until the cache expires. NSWorkspace.icon(forFile:) returns a blank page for this type; Finder and QuickLook show the composed icon.
• Debug and Release export the same type. The app that Launch Services registered last supplies the icon badge.

[onevcat]

Review round 1 summary:

• Dedicated icon is not bundled — deferred to a product decision. The system-generated icon (page + app icon + "WORKFLOW") is the current implementation. A bundled icon needs approved artwork.
• Double-click now reports "no application" — deferred to a product decision. This is the result of the role None, which was selected so that Prowl is not brought forward with nothing to show. The issue defers the open/import behavior.
• No guard for the icon declaration — fixed. WorkflowDocumentTypeTests now also checks CFBundleTypeIconSystemGenerated and UTTypeIconText.
• Finder check — partial. On a registered Debug build, Finder reports a new external .pwlworkflow directory as document file with the kind "Prowl Workflow". A screenshot of the Finder window was not possible (locked screen), so the icon in a Finder window is still not confirmed visually.

[onevcat]

Review round 2: no new findings. No change after 08839870. Still open: the bundled-icon decision, the interim double-click decision, and the visual Finder check (icon in a Finder window, Show Package Contents, double-click dialog), which needs an unlocked screen.

[onevcat]

Review loop ended at the round cap (4 rounds), not clean. No new findings after round 1 and no change after 08839870. Open before merge: (1) decision on a bundled dedicated icon or the system-generated icon; (2) decision on the interim double-click behavior with the role None; (3) manual Finder check in an unlocked session — icon in list/column/icon views, Show Package Contents, double-click dialog.