Fix floating bottom bar filling the screen when search is enabled

The Row wrapping the pill + search satellite used
crossAxisAlignment.stretch, but Scaffold.bottomNavigationBar gives its
child a loose (unbounded-max) height constraint - stretch on an
unbounded cross axis blows up to fill all available space in
profile/release builds (the debug assertion that would catch it is
stripped there), same class of bug files_controls_row.dart hit earlier
from a different cause. Both children already sized themselves
explicitly, so stretch was never actually needed - wrapping the Row in
a fixed-height SizedBox instead fixes it.

Added a regression test that reproduces this inside a real Scaffold
(the bare SizedBox host the other tests use gives a bounded height and
doesn't trigger it) - confirmed it fails without the fix (height 600,
the full test viewport) and passes with it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/widgets/noo/nav/noo_bottom_bar.dart

@@ -101,17 +101,29 @@ class NooBottomBar extends StatelessWidget {
         child: Padding(
           padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
           child: hasSearch
-              ? Row(
-                  crossAxisAlignment: CrossAxisAlignment.stretch,
-                  children: [
-                    Expanded(child: pill),
-                    const SizedBox(width: 8),
-                    _SearchSatellite(
-                      destination: searchDestination!,
-                      onTap: onSearchTap!,
-                      size: barHeight,
-                    ),
-                  ],
+              // A fixed-height SizedBox, not just a Row with
+              // crossAxisAlignment.stretch - the bottomNavigationBar slot
+              // gives this widget a *loose* (unbounded-max) height
+              // constraint, and stretch on an unbounded cross axis blows up
+              // to fill the screen in profile/release (the assertion that
+              // would catch it in debug is stripped there) - the same
+              // silent-oversizing bug files_controls_row.dart hit earlier
+              // from a different cause. Both children already size
+              // themselves explicitly (pill's own `height`, the
+              // satellite's `size`), so stretch was never actually needed.
+              ? SizedBox(
+                  height: barHeight,
+                  child: Row(
+                    children: [
+                      Expanded(child: pill),
+                      const SizedBox(width: 8),
+                      _SearchSatellite(
+                        destination: searchDestination!,
+                        onTap: onSearchTap!,
+                        size: barHeight,
+                      ),
+                    ],
+                  ),
                 )
               : pill,
         ),

test/widgets/noo/nav_test.dart

@@ -303,5 +303,39 @@ void main() {
       await tester.pump();
       expect(searchTaps, 1);
     });
+
+    testWidgets('floating with search sizes correctly in a real Scaffold '
+        '(regression: unbounded stretch used to fill the whole screen)', (
+      tester,
+    ) async {
+      // A bare SizedBox host (as the other tests use) gives this widget a
+      // bounded height, masking this exact bug - Scaffold.bottomNavigationBar
+      // gives its child a *loose*, unbounded-max height instead, which is
+      // what a Row with crossAxisAlignment.stretch blows up against in
+      // profile/release (the debug assertion that would catch it is
+      // stripped there). Only a real Scaffold reproduces that.
+      await tester.pumpWidget(
+        MaterialApp(
+          theme: nooTheme(Brightness.light),
+          home: Scaffold(
+            body: const SizedBox.expand(),
+            bottomNavigationBar: NooBottomBar(
+              style: NooNavStyle.android,
+              barStyle: NooBottomBarStyle.floating,
+              destinations: _destinations,
+              selectedIndex: 0,
+              onSelected: (_) {},
+              searchDestination: const NooNavDestination(
+                icon: LucideIcons.search,
+                label: 'Search',
+              ),
+              onSearchTap: () {},
+            ),
+          ),
+        ),
+      );
+      final size = tester.getSize(find.byType(NooBottomBar));
+      expect(size.height, lessThan(150));
+    });
   });
 }