2683

Added

• External Display Support — Added ExternalDisplayMode setting (System Mirror / Dedicated) so standard Metal cores can show the game-only view on a connected TV or monitor while the controller skin stays on the device screen; cores with custom rendering surfaces automatically fall back to system mirroring.
• supportsExternalDisplay Core Flag — Added supportsExternalDisplay: Bool property to PVEmulatorCore (defaults to !skipLayout: standard Metal cores opt in automatically; cores with custom rendering surfaces that do not set skipLayout = true must explicitly override and return false — e.g. Play! already does this).
• External Display Settings UI — Added Settings → Video → External Display picker to choose between System Mirror and Dedicated mode.