fix: exclude temporary paste writes from clipboard manager history

[postoso]

Description

FluidVoice temporarily writes dictated text to NSPasteboard.general when using Reliable Paste or a paste fallback. Clipboard managers can observe that write before FluidVoice restores the previous clipboard, leaving an unwanted transcription in history.

This marks the shared temporary pasteboard item with org.nspasteboard.TransientType and org.nspasteboard.AutoGeneratedType. The normal string remains available to Cmd+V, and the existing clipboard restoration behavior is unchanged. ConcealedType is intentionally omitted because the transcription is not necessarily sensitive content.

The Reliable Paste setting description is also updated so it no longer warns about the clipboard-history behavior fixed here.

Type of Change

• Bug fix (non-breaking change)
• New feature
• Breaking change
• Documentation update

Related Issue or Discussion

Related to #479, which relies on the clipboard paste path this change improves.

Testing

• Apple Silicon Mac on macOS 15.7.7
• SwiftLint strict: 0 violations in the changed Swift files
• xcodebuild build-for-testing
• 4 focused TypingServiceTransientPasteboardTests
• Verified the markers survive a real NSPasteboard write
• End-to-end Raycast check: FluidVoice inserted the transcription into TextEdit and Raycast returned no clipboard-history result for that text

Screenshots / Video

End-to-end verification: https://github.com/user-attachments/assets/bdbecb8f-ca65-4d07-8086-591583f22069

There are no UI layout changes.

[github-actions]

This PR has been closed because it still does not follow the required PR template after the 48-hour correction window.

Please open a new PR with the required description, related issue or accepted Discussion, testing notes, and screenshot/video evidence when applicable.

[altic-dev]

this seems like a good one! wanna fix all of the issues and perhaps add a clip for me to verify ? I can happily merge this ;) might be useful for me as well.

[greptile-apps]

Greptile Summary

The PR tags temporary clipboard writes as transient and auto-generated so compatible clipboard managers omit dictated text from history, while preserving the existing paste and clipboard-restoration behavior.

• Adds a shared constructor for marker-bearing temporary pasteboard items.
• Uses that item throughout the shared clipboard-paste insertion path.
• Updates the Reliable Paste description and adds focused pasteboard tests.

Confidence Score: 5/5

The PR appears safe to merge; the temporary paste remains available as plain text and the existing clipboard restoration and fallback behavior is preserved.

The marker-bearing item is written through the same shared path used by every clipboard insertion fallback, retains the required plain-string representation, and does not alter synchronization, action dispatch, or restoration decisions.

_{Reviews (1): Last reviewed commit: "fix: exclude temporary paste writes from..." | Re-trigger Greptile}

[postoso]

Rebased this onto current main and resolved the old conflicts.

The temporary pasteboard write now carries the normal string plus the Transient and AutoGenerated markers. Concealed is intentionally omitted. I also updated the stale Reliable Paste description and added coverage confirming the markers survive a real NSPasteboard write.

Verified with SwiftLint, build-for-testing, 4 focused tests, and an end-to-end Raycast check. FluidVoice inserted the transcription into TextEdit, restored the clipboard, and Raycast returned no clipboard-history result for the inserted text.

Video attached below.

pr526-fluidvoice-raycast-proof.mp4