docs(launcher): update display layout doc — display_control replaces displayplacer as primary

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/PROJECT__AE_Events_Launcher_Native_integration.md

@@ -104,7 +104,7 @@ The native shell provides specialized handlers for controlling the "Podium Exper
 
 ### 5.3 Implemented Actuators (Phase 5 Complete)
 - **Recording:** `manage_recording({action})` — Aperture session capture (`start`, `stop`, `status`). macOS only.
-- **Display Layouts:** `set_display_layout({mode, configStr?})` — Mirror / Extend via [`displayplacer`](https://github.com/jakehilborn/displayplacer). macOS only. Auto-detects connected displays via `displayplacer list`; `configStr` is an optional per-device manual override. Requires `brew install displayplacer` on each venue Mac. Failures are logged to the Electron console but do not block file open. A **Display Mode** toggle (Extend / Mirror) is available in the Launcher config — Native OS section, visible without Technical Mode.
+- **Display Layouts:** `set_display_layout({mode, configStr?})` — Mirror / Extend displays. macOS only. **Primary:** native `display_control` binary (`resources/bin/display_control`) uses CoreGraphics APIs directly — no Homebrew dependency. Built from `scripts/display_control.m` via `scripts/build-display-control.sh` on a Mac; commit the binary to the repo. **Fallback:** [`displayplacer`](https://github.com/jakehilborn/displayplacer) (`brew install displayplacer`) used when binary is absent or `configStr` override is set. Failures are logged to the Electron console but do not block file open. A **Display Mode** toggle (Extend / Mirror) is available in the Launcher config — Native OS section, visible without Technical Mode.
 - **Power Control:** `power_control({action})` — Shutdown, reboot, sleep. macOS + Linux.
 - **Window Control:** `window_control({action})` — Maximize, minimize, fullscreen, kiosk mode.
 - **Wallpaper:** `set_wallpaper({path?, url?, url_external?, display?, api_key?, account_id?})` — Downloads from URL (cached locally) or applies a local path. Per-display targeting (`'all'`/`'primary'`/`'external'`). macOS only in production; Linux returns a dev-mode preview payload.