fix(ci): support pwsh whitespace checks

- replace unsupported Unicode escape syntax in the local

  PowerShell whitespace checker

Make renders consistent on CI

test(render): force deterministic font rasterization

Force ANTIALIASED_QUALITY for render tests by setting
FW_FONT_QUALITY=4 in the render test assembly setup and
reading that override in the native LOGFONT creation
paths. This keeps local and CI rasterization aligned
without changing production rendering.

Also remove the RootSite per-channel pixel tolerance
now that tests render deterministically again, so
snapshot failures remain strict and actionable.

fix(render): refresh baselines and restore datatree chrome

test: normalize deterministic render fonts

test: warm hidden-fields render capture

test: enrich render diff diagnostics

test: stabilize hidden-fields capture width

Author: johnml1135

Build/Agent/check-whitespace.ps1

@@ -83,7 +83,7 @@ Get-Content check-results.log | ForEach-Object {
 }
 
 if ($problems.Count -gt 0) {
-	Write-Host "`u26A0`uFE0F Please review the output for further information."
+	Write-Host 'WARNING: Please review the output for further information.'
 	Write-Host '### A whitespace issue was found in one or more of the commits.'
 	Write-Host ''
 	Write-Host 'Errors:'

Src/Common/Controls/DetailControls/DetailControlsTests/DataTreeRenderTests.DataTreeRender_collapsed.verified.png

@@ -0,0 +1,25 @@
+{
+  "ScenarioId": "subsubsub-hidden-productionlike",
+  "SnapshotName": "DataTreeRenderTests.DataTreeRender_subsubsub-hidden-productionlike",
+  "CapturedAtUtc": "2026-04-07T19:31:52.092415Z",
+  "ImageWidth": 1024,
+  "ImageHeight": 1296,
+  "MachineName": "SIL-XPS",
+  "OsVersion": "Microsoft Windows NT 10.0.26200.0",
+  "EnvironmentHash": "3sUMmJxy5F2yJfd/zkW+tp+Srfbv4NmGLzt3D19Uu7c=",
+  "Environment": {
+    "DpiX": 96,
+    "DpiY": 96,
+    "FontSmoothing": true,
+    "ClearTypeEnabled": true,
+    "ThemeName": "Light",
+    "TextScaleFactor": 1.0,
+    "ScreenWidth": 1366,
+    "ScreenHeight": 768,
+    "CultureName": "en-US"
+  },
+  "DpiAwareness": "Unaware",
+  "FontQuality": "4",
+  "DeterministicFontFamily": "Segoe UI",
+  "DeterministicFontInstalled": true
+}

Src/Common/Controls/DetailControls/DetailControlsTests/DataTreeRenderTests.DataTreeRender_deep.verified.png

@@ -0,0 +1,25 @@
+{
+  "ScenarioId": "subsubsub-hidden",
+  "SnapshotName": "DataTreeRenderTests.DataTreeRender_subsubsub-hidden",
+  "CapturedAtUtc": "2026-04-07T19:31:49.8258833Z",
+  "ImageWidth": 1024,
+  "ImageHeight": 1259,
+  "MachineName": "SIL-XPS",
+  "OsVersion": "Microsoft Windows NT 10.0.26200.0",
+  "EnvironmentHash": "3sUMmJxy5F2yJfd/zkW+tp+Srfbv4NmGLzt3D19Uu7c=",
+  "Environment": {
+    "DpiX": 96,
+    "DpiY": 96,
+    "FontSmoothing": true,
+    "ClearTypeEnabled": true,
+    "ThemeName": "Light",
+    "TextScaleFactor": 1.0,
+    "ScreenWidth": 1366,
+    "ScreenHeight": 768,
+    "CultureName": "en-US"
+  },
+  "DpiAwareness": "Unaware",
+  "FontQuality": "4",
+  "DeterministicFontFamily": "Segoe UI",
+  "DeterministicFontInstalled": true
+}