Prepare Trayffeine 1.2.0 presence diagnostics

[rodrigoantonioli]

Summary

• Adds persistent presence compatibility mode using F15 as the effective keep-awake backend.
• Adds effective-method tray status, copy diagnostics support, and improved menu organization.
• Bumps Trayffeine to 1.2.0 and refreshes README, changelog, roadmap, contributor, agent, packaging, and WinGet docs.

Test Plan

• .venv\Scripts\ruff.exe check .
• .venv\Scripts\python.exe -m pytest
• git diff --check

Notes

• Real interactive Windows tray validation is still recommended before release because pystray/dialog/notification behavior is not fully covered by unit tests.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Use a non-null clipboard owner

On Windows, when a user selects Support > Copy diagnostics, this opens the clipboard with a NULL owner and then calls EmptyClipboard before SetClipboardData. The Win32 clipboard docs note that this sequence leaves the clipboard owner NULL and can make SetClipboardData fail, so the new diagnostics action can log failure without copying anything. Pass a real owner HWND, such as the tray window or a hidden helper window, before emptying the clipboard.

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