Add hide-rdp-connection-bar mod

[StarlightDaemon]

Summary

New mod: permanently hides the floating RDP connection bar (BBarWindowClass) in fullscreen mstsc.exe sessions on Windows 11, where the native hide options (the pin button, the client toggle, and displayconnectionbar:i:0 in the .rdp file) don't persist reliably.

Hooks four Win32 APIs inside mstsc.exe — CreateWindowExW, ShowWindow, SetWindowPos, and SetWindowTextW — to detect and suppress the bar at the process level. All original calls complete normally.

Optionally shows a clean disconnect button pinned to any corner of the screen with live hostname display, idle fade, configurable hotkey with conflict detection, multi-monitor awareness, and full DPI scaling.

Test plan

• Bar is hidden immediately on session start in fullscreen mstsc.exe
• Bar stays hidden after Ctrl+Alt+Home and any subsequent mstsc show attempts
• Disconnect button appears in the correct corner with correct DPI scaling
• Button repositions correctly when the RDP window moves to a different monitor
• Hostname updates live as mstsc resolves the remote host
• Hotkey registers and disconnects correctly; conflict state displays on button when registration fails
• Settings changes apply correctly via Wh_ModSettingsChanged
• Mod unloads cleanly — original wndproc restored, no mstsc crash

Changelog

If this pull request updates an existing mod, describe the changes below:

N/A — new mod.

Mod authorship

If this pull request introduces a new mod, please complete the section below.
This mod was created by:

• • The submitter, without AI assistance
• • The submitter, with AI assistance
• • Claude
• • ChatGPT
• • Gemini
• • Another AI (please specify):
• • Other (please specify):

Please select the options that best apply. Your selection does not affect the acceptance criteria, but it helps reviewers understand the context of the code and provide relevant feedback.

[m417z]

Changing GWLP_WNDPROC directly might conflict with other mods. Prefer using WindhawkUtils::SetWindowSubclassFromAnyThread. Look at existing mods for reference.

[m417z]

There's a feature request to be able to resize the bar: #2116
I don't think this mod addresses this, right? Would you like to add it?