test(print): measure precise font scale in actual PDFs

Refs #12, #13

Co-Authored-By: Codex (GPT-6) <noreply@openai.com>
Signed-off-by: James Maes <jmaes@dmdbrands.com>

docs/SESSION-STATE.md

@@ -39,11 +39,16 @@ width versus full page and actual optional border rows. New helper edits actual
 native options, including padding NumberBox; all generated PDF/PNG bytes retained.
 Signedd0a225d / CI38127089763 finishes native/published53/54, zero skips.
 Actual saved custom-width/border/full-page case passes. Font/padding case fails
-before PDF output at the fourth requested zoom wait; installed channels are not
+before PDF output at a requested zoom wait; installed channels are not
 reached. Exact expected/actual glyph rectangles and native state are now retained
-on failure; all original assertions remain. Retained red log and published TRX:
+on failure. Diagnostic6e17674 proves the second step: initial35px,121% actual44px,
+expected42.35px from multiplying an already-rounded UIA text box. The new PDF
+case now requires actual increasing screen glyphs and completed native percentage,
+plus bounded final screen growth; precise standard/matched font ratios remain
+asserted against real PDF glyph bands. No PDF/state assertion is removed.
+Retained red log and published TRX:
 artifacts/print-geometry-native-38127089763.log and
-artifacts/print-geometry-installed-38127089763. New diagnostic head requires54
+artifacts/print-geometry-installed-38127089763. Corrected head requires54
 native/published and53 per installed channel. No local GUI input or new dependency.
 ADR-0003 remains proposed; full font/padding/paired-find acceptance is pending.
 
@@ -83,7 +88,7 @@ Superseded diagnostic jobs are not fixed-head acceptance proof.
 
 ## Next steps
 
-1. Diagnose exact fourth-zoom geometry; require expanded full gates and retained PDF/TRX evidence.
+1. Verify actual PDF font/padding/find after the diagnosed UIA font rounding; require expanded full gates and retained PDF/TRX evidence.
 2. Complete source raw-heading audit and broader zoom/theme/find/collapse proof.
 3. Complete print #12 output/state acceptance, windows/recents/activation and remaining theme/render/link parity.
 4. Finish standards inventory; exact signed stable/dev artifacts remain deferred.

docs/TODO.md

@@ -40,7 +40,7 @@
 - [ ] Verify actual zoom glyph/key/reload/theme/find/collapse behavior in native, published and both installed channels.
 - [x] Implement print-only themes/options, native Windows print UI and explicit PDF save (issue #12); core363/100% lines; no new renderer dependency.
 - [x] Verify original3 focused native print cases on ec5f98f/38125751638: both cancels, real default/themed PDF pixels and unchanged actual glyph/view/source/collapse state.
-- [x] Implement actual PDF font/padding/width/border comparisons and successful-export paired-find preservation; d0a225d native/published width/borders pass, fourth zoom wait fails before font/padding output.
+- [x] Implement actual PDF font/padding/width/border comparisons and successful-export paired-find preservation; d0a225d native/published width/borders pass, zoom wait fails before font/padding output. Diagnostic6e17674 confirms rounded UIA metrics; corrected case measures precise font ratios in actual PDFs.
 - [x] Verify clean original3 print cases in full300e145: native/published52 each, installed stable/dev51 each, zero failures/skips; real PDFs and update apply/restart retained.
 - [ ] Verify actual native print cancellation, saved PDF image/background/font/layout output and unchanged reading/source/find/collapse state in all channels.
 - [ ] Add multiple document windows, recent files and Windows activation/file associations.

tests/MarkdownViewr.Windows.UiTests/AppTests.PrintGeometry.cs

@@ -23,11 +23,18 @@ public partial class AppTests
       double height = session.WaitForElement("mv-heading-0").BoundingRectangle.Height;
       for(int step = 0; step < 4; step++)
       {
+         double previous = session.WaitForElement("mv-heading-0").BoundingRectangle.Height;
          session.ClickElement("ZoomInButton");
-         double expected = height * Math.Pow(1.1, step + 1);
-         _output.WriteLine(FormattableString.Invariant($"Print zoom step={step + 1}; original height={height}; expected={expected}; actual={session.WaitForElement("mv-heading-0").BoundingRectangle}; reset={session.WaitForElement("ZoomResetButton").Name}."));
-         WaitForZoomGlyph(session, expected);
+         string percentage = Math.Round(Math.Pow(1.1, step + 1) * 100).ToString(System.Globalization.CultureInfo.InvariantCulture);
+         session.WaitFor(() =>
+         {
+            AutomationElement heading = session.WaitForElement("mv-heading-0");
+            AutomationElement reset = session.WaitForElement("ZoomResetButton");
+            return heading.BoundingRectangle.Height > previous && reset.IsEnabled && string.Equals(reset.Name, "Actual size (" + percentage + "%)", StringComparison.Ordinal) ? heading : null;
+         }, "the real larger heading at the completed requested zoom step");
       }
+      // UIA text boxes use rounded font metrics (35px becomes 44px at 121%); exact font scale is measured in the PDF below.
+      Assert.InRange(session.WaitForElement("mv-heading-0").BoundingRectangle.Height / height, 1.35, 1.6);
       session.InvokeMenuItem("View", "SourceToggle");
       session.InvokeMenuItem("Edit", "FindMenuItem");
       session.EnterText("FindText", "paired needle");