Build universal binaries (arm64 + x86_64) with modern Xcode

[eighteight]

Closes #7.

The Simple apps currently build Intel-only (and fail to build at all with recent Xcode). This PR makes both apps build and run as universal binaries out of the box.

Changes

• Remove VALID_ARCHS = "i386 x86_64" from both app projects. This setting filtered arm64 out of ARCHS, so builds on Apple Silicon were Intel-only. With it removed, Xcode's standard architectures apply (arm64 + x86_64 on current toolchains).
• MACOSX_DEPLOYMENT_TARGET = 10.9 → $(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET) in both app projects, matching what Syphon-Framework already does on master. Targeting 10.9 no longer compiles with current Xcode (libarclite was removed in Xcode 14.3).
• Add LD_RUNPATH_SEARCH_PATHS = "@loader_path/../Frameworks" to the app targets. Current Syphon-Framework uses an @rpath install name; without a runpath entry the apps crash at launch with Library not loaded … no LC_RPATH's found.
• Bump the Syphon-Framework submodule from ef72eff (2022) to current master (71351d4). Note: building the framework now requires Xcode's Metal toolchain component (xcodebuild -downloadComponent MetalToolchain).

Verification

Built with Xcode 26.6 on an Apple Silicon Mac (macOS 26):

xcodebuild -workspace Simple.xcworkspace -scheme "Simple Server" \
  -configuration Release -destination "generic/platform=macOS" build

• lipo -archs on both app executables and the embedded Syphon.framework: x86_64 arm64
• Simple Server launched natively on arm64: registers its server in the Syphon directory, visible to other clients
• Simple Client launched natively on arm64 and via Rosetta (arch -x86_64) to exercise the Intel slice — both run cleanly

🤖 Generated with Claude Code

[eighteight]

Added a follow-up commit for Simple Client: rebuilding with a modern SDK broke the toolbar — NSToolbarItem no longer derives its size from a custom view's nib frame, so the view-based items (server popup, size/FPS status box) collapsed to zero width and vanished into the overflow menu, and the window also picked up the compact unified toolbar style. The commit pins the item views to their nib sizes with explicit constraints, opts the window into NSWindowToolbarStyleExpanded, and titles the server menu's overflow representation. Verified on macOS 26 / Xcode 26.6: both toolbar items render inline as before, server list populates, and the status box shows live size/FPS from a running Simple Server.

🤖 Generated with Claude Code

[vade]

Awesome, thank you! Ill review this shortly! Much obliged!

[eighteight]

One more commit: Simple Server now draws a rotating wheel again. The original app animated a bundled Quartz Composer composition; since the QC dependency was removed the renderer had been a pulsing clear color with a TODO: a more interesting animation. The new renderer draws a wheel in the old one's spirit — outer ring with three arrows, counter-rotating inner ring, central disc, orbiting dot — in OpenGL 3.2 Core. Verified running: publishes at ~60 fps, received and displayed by Simple Client. Fixes #4.

🤖 Generated with Claude Code

[vade]

Ha - lets pause on that last one - keep the issue focused - at some point soon we're going to re-introduce the full Syphon icon render via https://fabric.graphics :)

[eighteight]

Ha - lets pause on that last one - keep the issue focused - at some point soon we're going to re-introduce the full Syphon icon render via https://fabric.graphics :)

NP