fix(sample-mobile): align RN/Expo to the 0.85.3 toolchain and exclude x86_64 sim

The "update everything to latest" pass drifted the mobile samples off the React
Native 0.85 / Expo SDK 56 toolchain, breaking standalone installs/builds:

- react 19.2.6 -> 19.2.3 (must equal react-native-renderer 19.2.3, else
  "Incompatible React versions" at runtime); same for react-dom /
  react-test-renderer. eslint 10 -> ^8.19.0, jest 30 -> ^29.6.3, @types/jest 29,
  typescript -> ^5.8.3, react-native 0.85.2 -> 0.85.3 (matches @react-native/*).
- RN CLI + playground: exclude x86_64 from the iOS simulator build
  (EXCLUDED_ARCHS in project.pbxproj + Podfile post_install for all Pod
  targets) so it links the arm64-only cpp.js xcframeworks. Regenerate the
  RN CLI Podfile.lock for 0.85.3.
- Expo: declare the cpp.js deps its source imports directly
  (@cpp.js/core-embind-jsi, @cpp.js/plugin-metro, hermes-compiler) — pnpm's
  strict node_modules does not expose them transitively from plugin-react-native.
- Mark the mobile samples private (not published).
- check-external-dependencies: pin the RN 0.85 / Expo SDK 56 toolchain so
  `check:deps --update` never bumps these back to npm latest.

Note: Expo's iOS Release build still needs an x86_64-exclusion config plugin
(expo prebuild regenerates the native project), tracked separately.

Author: bugra9

cppjs-samples/cppjs-playground-mobile-reactnative-cli/ios/Podfile

@@ -30,5 +30,13 @@ target 'cppjsSampleReactNativeCLI' do
       :mac_catalyst_enabled => false,
       # :ccache_enabled => true
     )
+    # cpp.js ships arm64-only iOS simulator slices. Release configs build for all
+    # archs (ONLY_ACTIVE_ARCH=NO), so exclude x86_64 from every Pod target too —
+    # the app target alone is not enough once Pods are built for the simulator.
+    installer.pods_project.targets.each do |target|
+      target.build_configurations.each do |build_config|
+        build_config.build_settings['EXCLUDED_ARCHS[sdk=iphonesimulator*]'] = 'x86_64'
+      end
+    end
   end
 end

cppjs-samples/cppjs-playground-mobile-reactnative-cli/ios/cppjsSampleReactNativeCLI.xcodeproj/project.pbxproj

@@ -344,7 +344,7 @@
 				COPY_PHASE_STRIP = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
-				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "";
+				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "x86_64";
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -426,7 +426,7 @@
 				COPY_PHASE_STRIP = YES;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "";
+				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "x86_64";
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;

cppjs-samples/cppjs-playground-mobile-reactnative-cli/package.json

@@ -47,8 +47,8 @@
         "@cpp.js/package-tiff-ios": "workspace:^",
         "@cpp.js/package-webp-ios": "workspace:^",
         "@cpp.js/package-zlib-ios": "workspace:^",
-        "react": "19.2.6",
-        "react-native": "0.85.2",
+        "react": "19.2.3",
+        "react-native": "0.85.3",
         "react-native-safe-area-context": "^5.8.0",
         "hermes-compiler": "*"
     },
@@ -66,14 +66,14 @@
         "@react-native/gradle-plugin": "0.85.3",
         "@react-native/metro-config": "0.85.3",
         "@react-native/typescript-config": "0.85.3",
-        "@types/jest": "^30.0.0",
+        "@types/jest": "^29.5.13",
         "@types/react": "^19.2.15",
         "@types/react-test-renderer": "^19.1.0",
-        "eslint": "^10.4.0",
-        "jest": "^30.4.2",
+        "eslint": "^8.19.0",
+        "jest": "^29.6.3",
         "prettier": "3.8.3",
-        "react-test-renderer": "19.2.6",
-        "typescript": "6.0.3"
+        "react-test-renderer": "19.2.3",
+        "typescript": "^5.8.3"
     },
     "engines": {
         "node": ">= 22.11.0"

cppjs-samples/cppjs-sample-mobile-reactnative-cli/ios/Podfile

@@ -30,5 +30,13 @@ target 'cppjsSampleReactNativeCLI' do
       :mac_catalyst_enabled => false,
       # :ccache_enabled => true
     )
+    # cpp.js ships arm64-only iOS simulator slices. Release configs build for all
+    # archs (ONLY_ACTIVE_ARCH=NO), so exclude x86_64 from every Pod target too —
+    # the app target alone is not enough once Pods are built for the simulator.
+    installer.pods_project.targets.each do |target|
+      target.build_configurations.each do |build_config|
+        build_config.build_settings['EXCLUDED_ARCHS[sdk=iphonesimulator*]'] = 'x86_64'
+      end
+    end
   end
 end