"Reveal in Finder" opens the file itself instead of revealing it in Finder

[BlessedChild]

Clicking "Reveal in Finder" in the top-left toolbar is expected to open the file's enclosing folder in Finder with the file highlighted (the standard macOS convention used by virtually every Mac app). In Finch, the action instead opens the .md file itself with the system default app — Finder is never surfaced. Either fix the behavior to match the standard reveal pattern, or rename the menu item to something like "Open in Finch" so the label matches what actually happens.

Steps to reproduce

1. Open any conversation that references a workspace file (e.g. a .md file).
2. Click the top-left "Reveal in Finder" entry.

Expected behavior

A Finder window opens (or is brought to the front) showing the file's enclosing folder, with the file selected — matching the macOS convention used by all native and most third-party Mac apps.

Actual behavior

The .md file is opened directly in the system default app (or in Finch itself). Finder is not surfaced; the user has no way to navigate around the file from this entry point.

Suggested fix

Either:

• Implement the standard "reveal" behavior — on macOS, call NSWorkspace.shared.activateFileViewerSelecting([url]), or shell out to open -R <path>;
• Or rename the menu item so the label matches the actual behavior (e.g. "Open file" / "Open in Finch").

Environment

• App: Finch 1.2.1 (build 247) — Desktop
• OS: macOS 26.4.1 (25E253)