This PR fixes two bugs introduced in #80 :
- Exiting fullscreen could exit the Ryujinx window (https://github.com/Ryubing/Issues/issues/415)
- Toggling fullscreen on would move the window to the primary monitor
And two other bugs related to input view :
- Exiting fullscreen when window was previously in a non maximized state now conserves the window coordinates and size properly (https://github.com/Ryubing/Issues/issues/425)
- Opening the ryujinx app no makes the app grow slightly larger vertically on each launch (+31px on my 1080p monitor) (https://github.com/Ryubing/Issues/issues/425)
This PR is the first in a batch of structural changes to Ryujinx.
**Changes**
- Added `ProcessIdentity` and `ProcessKind` to describe loaded programs by:
- PID, program ID, application ID, program index, display version, process kind
- Stored identity metadata on `ProcessResult`.
- Added PID-based process lookup helpers to `ProcessLoader`.
- Updated HLE services to resolve application metadata through the caller PID instead of `Processes.ActiveApplication`.
- Added PTC/JIT disk cache initialization logging with PID, title ID, display version, selector, and enabled state.
- Added `ClientProcessId` property to ServiceCtx (/src/Ryujinx.HLE/HOS/ServiceCtx.cs) that uses the handle descriptor PId when available, falling back to `Process.Pid`.
- Updated 15 HLE service files to use `context.ClientProcessId` instead of `context.Process.Pid` for client process access, ensuring services correctly identify the calling process even when invoked via IPC with handle descriptors.
These changes make service metadata resolution more explicit and prepare the emulator for other structural changes later on.
This PR aims to Fix the Windows fullscreen gap when toggling from maximized state by using canonical Win32 fullscreen approach. When entering fullscreen, the window style is saved and replaced with WS_POPUP | WS_VISIBLE to remove all window chrome (title bar, borders), then SetWindowPos sizes the window to cover the full screen with SWP_FRAMECHANGED to force Win32 to recalculate the frame. On exit, the original window style is restored. This eliminates the few-pixel gap at the top that occurred because Avalonia's WindowState = FullScreen transition from a maximized state retained the title bar non-client area, leaving visible space at the top of the screen (Fullscreen resolution would be 1920 x 1072p on a 1080p monitor, it now correctly renders at 1920 x 1080p)
Babib3l