Scale two bullet columns independently

A two-bullet-column slide sized both columns with the smaller of the two fit
scales, so a sparse column (e.g. 8 items) was shrunk to a crowded one's size
(e.g. 19 items), leaving the text tiny with empty space below it.

Each column now scales to fill its own height; the column headings keep a
shared size so the layout stays tidy.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CHANGELOG.md

@@ -47,6 +47,8 @@ and the project aims to follow [Semantic Versioning](https://semver.org/).
   separate from the slide title.
 - Slide text auto-sizing now measures with the deck's own font, so text grows to
   use the available space more accurately instead of staying smaller than needed.
+- The two bullet columns now scale **independently**, so a column with few items
+  is no longer shrunk down to the size of a crowded one beside it.
 - Slide transitions in the presenter no longer flash a black frame (neighbour
   images are precached and `gaplessPlayback` is enabled) — important for
   recording.

lib/widgets/slides/slide_preview.dart

@@ -1050,7 +1050,6 @@ class _TwoBulletsPreview extends StatelessWidget {
       font: font,
       maxScale: _kBulletsMaxScale,
     );
-    final scale = leftScale < rightScale ? leftScale : rightScale;
 
     return Container(
       color: _hexColor(profile.slideBackgroundColor),
@@ -1089,6 +1088,8 @@ class _TwoBulletsPreview extends StatelessWidget {
                   Row(
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
+                      // Each column scales to fill its own height, so a sparse
+                      // column is not shrunk down to a crowded one's size.
                       _bulletColumn(
                         context,
                         title: col1Title,
@@ -1099,7 +1100,7 @@ class _TwoBulletsPreview extends StatelessWidget {
                         headingGap: headingGap,
                         bulletSize: bulletSize,
                         bulletGap: bulletGap,
-                        scale: scale,
+                        scale: leftScale,
                       ),
                       SizedBox(width: columnGap),
                       _bulletColumn(
@@ -1112,7 +1113,7 @@ class _TwoBulletsPreview extends StatelessWidget {
                         headingGap: headingGap,
                         bulletSize: bulletSize,
                         bulletGap: bulletGap,
-                        scale: scale,
+                        scale: rightScale,
                       ),
                     ],
                   ),

test/two_bullets_preview_test.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:ocideck/models/slide.dart';
+import 'package:ocideck/widgets/slides/inline_markdown.dart';
 import 'package:ocideck/widgets/slides/slide_preview.dart';
 
 Widget _host(Slide slide) {
@@ -58,6 +59,31 @@ void main() {
     expect(tester.takeException(), isNull);
   });
 
+  testWidgets('two-bullet columns scale independently (sparse stays large)', (
+    tester,
+  ) async {
+    final slide = Slide.create(SlideType.twoBullets).copyWith(
+      bullets: const ['Solo'],
+      bullets2: List.generate(14, (i) => 'Item $i'),
+    );
+
+    await tester.pumpWidget(_host(slide));
+    await tester.pump();
+
+    double sizeOf(String text) => tester
+        .widget<InlineMarkdownText>(
+          find.byWidgetPredicate(
+            (x) => x is InlineMarkdownText && x.text == text,
+          ),
+        )
+        .style
+        .fontSize!;
+
+    // The single-bullet column is not shrunk to the 14-bullet column's size.
+    expect(sizeOf('Solo'), greaterThan(sizeOf('Item 0') * 1.3));
+    expect(tester.takeException(), isNull);
+  });
+
   testWidgets('bullets slide renders an optional subheading below the title', (
     tester,
   ) async {