Add main menu scene with Rive UI, procedural background, and scene transitions

- Add Menu scene with Rive-driven login and navigation UI
  (RiveLoginController, RiveNavigationController) for entering a
  username and starting/navigating the client via Rive triggers
- Add SceneTransitionController to fade out and load the Landscape
  gameplay scene when Play is selected
- Add procedural low-poly triangle field background and animated wave
  panel (LowPolyTriangleField, TriangleWavePanel) with matching
  editor menus and materials
- Add MenuLightAnimator for animated menu lighting and UI fade helpers
  (MenuFadeIn, DebugFadeToggle/Bridge)
- Rename SampleScene to Landscape and wire ChatNetworkManager to hide
  the new Rive login canvas once gameplay starts
- Bump Input System action codegen version and add Rive package
  references/project settings updates to support the new UI

ProjectSettings/ProjectSettings.asset

@@ -3,7 +3,7 @@
 --- !u!129 &1
 PlayerSettings:
   m_ObjectHideFlags: 0
-  serializedVersion: 28
+  serializedVersion: 29
   productGUID: 119402677d68df74f9aaf6809b3ded7a
   AndroidProfiler: 0
   AndroidFilterTouchesWhenObscured: 0
@@ -41,7 +41,6 @@ PlayerSettings:
     height: 1
   m_SplashScreenLogos: []
   m_VirtualRealitySplashScreen: {fileID: 0}
-  m_HolographicTrackingLossScreen: {fileID: 0}
   defaultScreenWidth: 1024
   defaultScreenHeight: 768
   defaultScreenWidthWeb: 960
@@ -66,10 +65,15 @@ PlayerSettings:
   useOSAutorotation: 1
   use32BitDisplayBuffer: 1
   preserveFramebufferAlpha: 0
+  adjustIOSFPSUsingThermalState: 1
+  thermalStateSeriousIOSFPS: 30
+  thermalStateCriticalIOSFPS: 15
   disableDepthAndStencilBuffers: 0
   androidStartInFullscreen: 1
   androidRenderOutsideSafeArea: 1
   androidUseSwappy: 0
+  androidRequestedVisibleInsets: 0
+  androidSystemBarsBehavior: 2
   androidDisplayOptions: 1
   androidBlitType: 0
   androidResizeableActivity: 1
@@ -83,7 +87,7 @@ PlayerSettings:
   androidApplicationEntry: 2
   defaultIsNativeResolution: 1
   macRetinaSupport: 1
-  runInBackground: 0
+  runInBackground: 1
   muteOtherAudioSources: 0
   Prepare IOS For Recording: 0
   Force IOS Speakers When Recording: 0
@@ -114,6 +118,7 @@ PlayerSettings:
   xboxEnableGuest: 0
   xboxEnablePIXSampling: 0
   metalFramebufferOnly: 0
+  metalUseMetalDisplayLink: 0
   xboxOneResolution: 0
   xboxOneSResolution: 0
   xboxOneXResolution: 3
@@ -148,12 +153,10 @@ PlayerSettings:
   - {fileID: -944628639613478452, guid: 052faaac586de48259a63d0c4782560b, type: 3}
   metroInputSource: 0
   wsaTransparentSwapchain: 0
-  m_HolographicPauseOnTrackingLoss: 1
   xboxOneDisableKinectGpuReservation: 1
   xboxOneEnable7thCore: 1
   vrSettings:
     enable360StereoCapture: 0
-  isWsaHolographicRemotingEnabled: 0
   enableFrameTimingStats: 0
   enableOpenGLProfilerGPURecorders: 1
   allowHDRDisplaySupport: 0
@@ -177,9 +180,10 @@ PlayerSettings:
     tvOS: 0
   overrideDefaultApplicationIdentifier: 1
   AndroidBundleVersionCode: 1
-  AndroidMinSdkVersion: 23
+  AndroidMinSdkVersion: 26
   AndroidTargetSdkVersion: 0
   AndroidPreferredInstallLocation: 1
+  AndroidPreferredDataLocation: 1
   aotOptions: 
   stripEngineCode: 1
   iPhoneStrippingLevel: 0
@@ -194,13 +198,14 @@ PlayerSettings:
   VertexChannelCompressionMask: 4054
   iPhoneSdkVersion: 988
   iOSSimulatorArchitecture: 0
-  iOSTargetOSVersionString: 13.0
+  iOSTargetOSVersionString: 15.0
   tvOSSdkVersion: 0
   tvOSSimulatorArchitecture: 0
   tvOSRequireExtendedGameController: 0
-  tvOSTargetOSVersionString: 13.0
+  tvOSTargetOSVersionString: 15.0
   VisionOSSdkVersion: 0
   VisionOSTargetOSVersionString: 1.0
+  xcodeProjectType: 0
   uIPrerenderedIcon: 0
   uIRequiresPersistentWiFi: 0
   uIRequiresFullScreen: 1
@@ -537,7 +542,6 @@ PlayerSettings:
   - m_BuildTarget: AndroidPlayer
     m_APIs: 150000000b000000
     m_Automatic: 0
-  m_BuildTargetVRSettings: []
   m_DefaultShaderChunkSizeInMB: 16
   m_DefaultShaderChunkCount: 0
   openGLRequireES31: 0
@@ -573,7 +577,7 @@ PlayerSettings:
   locationUsageDescription: 
   microphoneUsageDescription: 
   bluetoothUsageDescription: 
-  macOSTargetOSVersion: 11.0
+  macOSTargetOSVersion: 12.0
   switchNMETAOverride: 
   switchNetLibKey: 
   switchSocketMemoryPoolSize: 6144
@@ -719,6 +723,8 @@ PlayerSettings:
   switchMicroSleepForYieldTime: 25
   switchRamDiskSpaceSize: 12
   switchUpgradedPlayerSettingsToNMETA: 0
+  switchCaStoreSource: 0
+  switchCaStoreFilePath: 
   ps4NPAgeRating: 12
   ps4NPTitleSecret: 
   ps4NPTrophyPackPath: 
@@ -836,6 +842,7 @@ PlayerSettings:
     Android: 1
   il2cppCompilerConfiguration: {}
   il2cppCodeGeneration: {}
+  il2cppLTOMode: {}
   il2cppStacktraceInformation: {}
   managedStrippingLevel: {}
   incrementalIl2cppBuild: {}
@@ -905,7 +912,6 @@ PlayerSettings:
   XboxOneXTitleMemory: 8
   XboxOneOverrideIdentityName: 
   XboxOneOverrideIdentityPublisher: 
-  vrEditorSettings: {}
   cloudServicesEnabled: {}
   luminIcon:
     m_Name: 
@@ -928,6 +934,7 @@ PlayerSettings:
   captureStartupLogs: {}
   activeInputHandler: 1
   windowsGamepadBackendHint: 0
+  enableDirectStorage: 0
   cloudProjectId: b1927100-a84e-487e-887d-d657ec945065
   framebufferDepthMemorylessMode: 0
   qualitySettingsNames: []
@@ -943,3 +950,4 @@ PlayerSettings:
   androidVulkanAllowFilterList: []
   androidVulkanDeviceFilterListAsset: {fileID: 0}
   d3d12DeviceFilterListAsset: {fileID: 0}
+  allowedHttpConnections: 3