macOS: Cmd+V after copying file in Finder pastes icon path instead of file path

[Chee-0806]

Describe the bug

On macOS, when you copy a file in Finder (Cmd+C) and paste into OTTY (Cmd+V), the terminal pastes the file icon path or other non-file-path string instead of the full POSIX file path.

To Reproduce

1. Open Finder, select any file
2. Press Cmd+C to copy the file
3. Switch to OTTY
4. Press Cmd+V to paste
5. The pasted string is something like the icon path rather than /Users/.../file.txt

Expected behavior

Cmd+V should paste the full POSIX file path, matching Terminal.app, iTerm2, Warp, and Ghostty.

Actual behavior

An icon path or other pasteboard representation gets pasted instead of the file path.

Environment

• macOS (Apple Silicon / Intel)
• OTTY version: 0.1.0

Root cause (likely)

macOS Finder puts multiple representations on NSPasteboard when copying a file:

• public.file-url — the actual file URL (should be converted to POSIX path)
• public.utf8-plain-text — the file name only
• icon / image data

OTTY appears to pick the wrong pasteboard type. The fix should prioritize public.file-url and resolve it to a POSIX path string before pasting.