Add "Search in bottom bar" to Settings

New Settings > Appearance toggle moves Search into the bottom bar and
out of the top bar, so there's only one search entry point on screen.
Tapping it pushes SearchView same as before - it's never highlighted,
since it isn't a real destination.

- Attached: Search becomes the row's last item, styled like any other
  tab but permanently idle.
- Floating: Search gets its own separate, always fully round satellite
  circle beside the bar instead.

Enabling it costs one regular tab: SettingsController.maxVisibleTabs
is now a dynamic getter (defaultMaxVisibleTabs - 1 while the toggle is
on) instead of the old flat constant, re-enforced immediately if the
user already has all 5 slots filled - the same cleanup path used for
a fresh install or an app update that added a new tab.

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

lib/widgets/app_top_bar.dart

@@ -19,13 +19,24 @@ import 'shell/shell_common.dart';
 /// [style] is resolved by the caller (`NooLayout.navStyle`) rather than
 /// read from context here, since [preferredSize] is a plain getter with no
 /// BuildContext - the same reason [NooTopBar] itself takes it as a field.
+/// [searchInBottomBar] is [SettingsController.searchInBottomBar], passed in
+/// for the same reason: it hides this bar's own search field/icon so
+/// there's only ever one search entry point on screen once the bottom bar
+/// has taken it over.
 class AppTopBar extends StatelessWidget implements PreferredSizeWidget {
   final NooNavStyle style;
   final AppTab tab;
+  final bool searchInBottomBar;
 
-  const AppTopBar({super.key, required this.style, required this.tab});
+  const AppTopBar({
+    super.key,
+    required this.style,
+    required this.tab,
+    this.searchInBottomBar = false,
+  });
 
   bool get _ios => style == NooNavStyle.ios;
+  bool get _showSearch => !searchInBottomBar;
 
   @override
   Size get preferredSize => NooTopBar(
@@ -34,7 +45,7 @@ class AppTopBar extends StatelessWidget implements PreferredSizeWidget {
     // A throwaway placeholder purely to make preferredSize's "is there a
     // search slot" check match what build() actually shows - never
     // inserted into the tree, so its content doesn't matter.
-    search: _ios ? const SizedBox.shrink() : null,
+    search: _ios && _showSearch ? const SizedBox.shrink() : null,
   ).preferredSize;
 
   @override
@@ -44,7 +55,7 @@ class AppTopBar extends StatelessWidget implements PreferredSizeWidget {
       title: tab.label,
       onMenu: () => Scaffold.of(context).openDrawer(),
       actions: [
-        if (!_ios)
+        if (!_ios && _showSearch)
           NooTopBarButton(
             icon: LucideIcons.search,
             tooltip: 'Search',
@@ -58,7 +69,7 @@ class AppTopBar extends StatelessWidget implements PreferredSizeWidget {
           ),
         ShellAvatarButton(hitBox: _ios ? 44 : 48),
       ],
-      search: _ios ? const ShellSearchLauncher(ios: true) : null,
+      search: _ios && _showSearch ? const ShellSearchLauncher(ios: true) : null,
     );
   }
 }

lib/widgets/bottom_nav_bar.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:lucide_icons_flutter/lucide_icons.dart';
 import '../models/app_tab.dart';
 import 'noo/nav/noo_bottom_bar.dart';
 
@@ -7,12 +8,18 @@ import 'noo/nav/noo_bottom_bar.dart';
 /// doesn't need to import `noo/nav` itself. [selectedIndex] may be -1 (no
 /// destination highlighted) when the shell is showing a tab opened from the
 /// drawer's "More" list that isn't one of the pinned [tabs].
+///
+/// [onSearchTap] (from Settings' "Search in bottom bar") adds the Search
+/// entry [NooBottomBar] itself knows how to place (row's last item when
+/// attached, its own satellite when floating) - null leaves the bar
+/// exactly as before.
 class BottomNavBar extends StatelessWidget {
   final NooNavStyle style;
   final NooBottomBarStyle barStyle;
   final List<AppTab> tabs;
   final int selectedIndex;
   final ValueChanged<int> onDestinationSelected;
+  final VoidCallback? onSearchTap;
 
   const BottomNavBar({
     super.key,
@@ -21,6 +28,7 @@ class BottomNavBar extends StatelessWidget {
     required this.tabs,
     required this.selectedIndex,
     required this.onDestinationSelected,
+    this.onSearchTap,
   });
 
   @override
@@ -34,6 +42,10 @@ class BottomNavBar extends StatelessWidget {
       ],
       selectedIndex: selectedIndex,
       onSelected: onDestinationSelected,
+      searchDestination: onSearchTap == null
+          ? null
+          : const NooNavDestination(icon: LucideIcons.search, label: 'Search'),
+      onSearchTap: onSearchTap,
     );
   }
 }

lib/widgets/noo/nav/noo_bottom_bar.dart

@@ -38,12 +38,21 @@ const double _kAndroidPillHeight = 32;
 /// bottom safe-area inset rather than a fixed 34/20px spacer, so it's
 /// right on every device. Meant for `Scaffold.bottomNavigationBar` - the
 /// host `Scaffold` needs `extendBody: true` while floating.
+///
+/// [searchDestination]/[onSearchTap] (set together, from Settings'
+/// "Search in bottom bar" - see `DESIGN_SYSTEM.md`'s floating bottom bar
+/// entry) add a Search entry that's never highlighted (tapping it pushes
+/// `SearchView`, it doesn't select anything) - the row's last item when
+/// attached, or its own satellite circle beside the bar when floating,
+/// always fully round regardless of the bar's own corner radius.
 class NooBottomBar extends StatelessWidget {
   final NooNavStyle style;
   final NooBottomBarStyle barStyle;
   final List<NooNavDestination> destinations;
   final int selectedIndex;
   final ValueChanged<int> onSelected;
+  final NooNavDestination? searchDestination;
+  final VoidCallback? onSearchTap;
 
   const NooBottomBar({
     super.key,
@@ -52,6 +61,8 @@ class NooBottomBar extends StatelessWidget {
     required this.destinations,
     required this.selectedIndex,
     required this.onSelected,
+    this.searchDestination,
+    this.onSearchTap,
   });
 
   @override
@@ -59,27 +70,50 @@ class NooBottomBar extends StatelessWidget {
     final colors = context.nooColors;
     final ios = style == NooNavStyle.ios;
     final floating = barStyle == NooBottomBarStyle.floating;
+    final hasSearch = searchDestination != null && onSearchTap != null;
+    // Attached folds Search into the row itself (last item); floating
+    // gives it a separate satellite circle instead (built below), so the
+    // row builders only ever see it as a trailing item in the former case.
+    final rowSearch = hasSearch && !floating ? searchDestination : null;
 
     final row = ios
-        ? _buildIosRow()
-        : _buildAndroidRow(colors, floating: floating);
+        ? _buildIosRow(trailingSearch: rowSearch)
+        : _buildAndroidRow(
+            colors,
+            floating: floating,
+            trailingSearch: rowSearch,
+          );
     final barHeight = ios ? (floating ? 64.0 : 50.0) : (floating ? 72.0 : 80.0);
 
     if (floating) {
+      final pill = Container(
+        height: barHeight,
+        clipBehavior: Clip.antiAlias,
+        decoration: BoxDecoration(
+          color: colors.surface,
+          border: Border.all(color: colors.line),
+          borderRadius: BorderRadius.circular(28),
+        ),
+        child: row,
+      );
       return SafeArea(
         top: false,
         child: Padding(
           padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
-          child: Container(
-            height: barHeight,
-            clipBehavior: Clip.antiAlias,
-            decoration: BoxDecoration(
-              color: colors.surface,
-              border: Border.all(color: colors.line),
-              borderRadius: BorderRadius.circular(28),
-            ),
-            child: row,
-          ),
+          child: hasSearch
+              ? Row(
+                  crossAxisAlignment: CrossAxisAlignment.stretch,
+                  children: [
+                    Expanded(child: pill),
+                    const SizedBox(width: 8),
+                    _SearchSatellite(
+                      destination: searchDestination!,
+                      onTap: onSearchTap!,
+                      size: barHeight,
+                    ),
+                  ],
+                )
+              : pill,
         ),
       );
     }
@@ -96,7 +130,7 @@ class NooBottomBar extends StatelessWidget {
     );
   }
 
-  Widget _buildIosRow() {
+  Widget _buildIosRow({NooNavDestination? trailingSearch}) {
     return Row(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
@@ -108,15 +142,28 @@ class NooBottomBar extends StatelessWidget {
               onTap: () => onSelected(i),
             ),
           ),
+        if (trailingSearch != null)
+          Expanded(
+            child: _IosItem(
+              destination: trailingSearch,
+              selected: false,
+              onTap: onSearchTap!,
+            ),
+          ),
       ],
     );
   }
 
-  Widget _buildAndroidRow(NooColors colors, {required bool floating}) {
+  Widget _buildAndroidRow(
+    NooColors colors, {
+    required bool floating,
+    NooNavDestination? trailingSearch,
+  }) {
     final pillTop = floating ? _kFloatingPillTop : _kAttachedPillTop;
+    final itemCount = destinations.length + (trailingSearch != null ? 1 : 0);
     return LayoutBuilder(
       builder: (context, constraints) {
-        final itemWidth = constraints.maxWidth / destinations.length;
+        final itemWidth = constraints.maxWidth / itemCount;
         return Stack(
           children: [
             AnimatedPositioned(
@@ -147,6 +194,15 @@ class NooBottomBar extends StatelessWidget {
                       onTap: () => onSelected(i),
                     ),
                   ),
+                if (trailingSearch != null)
+                  Expanded(
+                    child: _AndroidItem(
+                      destination: trailingSearch,
+                      selected: false,
+                      floating: floating,
+                      onTap: onSearchTap!,
+                    ),
+                  ),
               ],
             ),
           ],
@@ -156,6 +212,45 @@ class NooBottomBar extends StatelessWidget {
   }
 }
 
+/// The floating bar's own Search entry point, next to the pill rather than
+/// inside it - always fully round (see [NooBottomBar]'s doc comment),
+/// same fill/border as the pill so the two still read as one family.
+class _SearchSatellite extends StatelessWidget {
+  final NooNavDestination destination;
+  final VoidCallback onTap;
+  final double size;
+
+  const _SearchSatellite({
+    required this.destination,
+    required this.onTap,
+    required this.size,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = context.nooColors;
+    return Semantics(
+      button: true,
+      label: destination.label,
+      child: GestureDetector(
+        behavior: HitTestBehavior.opaque,
+        onTap: onTap,
+        child: Container(
+          width: size,
+          height: size,
+          alignment: Alignment.center,
+          decoration: BoxDecoration(
+            color: colors.surface,
+            border: Border.all(color: colors.line),
+            shape: BoxShape.circle,
+          ),
+          child: Icon(destination.icon, size: 24, color: colors.fg1),
+        ),
+      ),
+    );
+  }
+}
+
 class _IosItem extends StatelessWidget {
   final NooNavDestination destination;
   final bool selected;

lib/widgets/settings/settings_appearance.dart

@@ -51,6 +51,18 @@ class SettingsAppearanceSection extends StatelessWidget {
           children: [
             _ThemeRow(settings: settings),
             _BottomBarStyleRow(settings: settings),
+            NooSettingsRow(
+              icon: LucideIcons.search,
+              label: const Text('Search in bottom bar'),
+              subtitle: const Text(
+                'Adds Search to the bottom bar and removes it from the top '
+                'bar - leaves room for one fewer regular tab',
+              ),
+              trailing: NooToggle(
+                checked: settings.searchInBottomBar,
+                onChanged: settings.setSearchInBottomBar,
+              ),
+            ),
           ],
         ),
         const SizedBox(height: NooSpace.xl),

lib/widgets/settings/settings_tabs.dart

@@ -11,7 +11,8 @@ import '../noo/noo_layout.dart';
 import 'settings_section.dart';
 
 /// Settings section 7: bottom-nav tab order, visibility (pinned = shown, up
-/// to [maxVisibleTabs]) and default tab.
+/// to [SettingsController.maxVisibleTabs] - one fewer while Appearance's
+/// "Search in bottom bar" is on) and default tab.
 class SettingsTabsSection extends StatelessWidget {
   const SettingsTabsSection({super.key});