Polish floating bottom bar: elevation, height, overlap, and FAB shape

- Give the floating bar and search satellite the app's one shadow
  (nooDialogShadow) plus a smaller, tighter height on both platforms.
- Let every tab's scrollable list compute its own bottom clearance
  (bottomBarClearance) instead of a flat 100px, so the floating bar no
  longer overlaps the last row/card.
- Square the Android upload FAB off to a rounded-square radius when the
  bottom bar is attached, keeping it fully round only when floating.
- Let a swipe on a file row trigger its action directly once dragged
  past 1.8x the reveal width, instead of requiring a second tap.

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

lib/views/activity_view.dart

@@ -92,7 +92,7 @@ class ActivityView extends StatelessWidget {
     final List<Widget> contentSlivers = [
       const SliverToBoxAdapter(child: SizedBox(height: NooSpace.md)),
       feed,
-      ...tabBottomInsetSlivers,
+      ...tabBottomInsetSlivers(context),
     ];
 
     final scrollView = CustomScrollView(

lib/views/favorites_view.dart

@@ -29,6 +29,7 @@ import '../widgets/noo/overlays/noo_sheet.dart';
 import '../widgets/noo/core/noo_button.dart';
 import '../widgets/share_sheet.dart';
 import '../widgets/sticky_header_delegate.dart';
+import '../widgets/tabs/tab_state_slivers.dart';
 import '../widgets/synced_header_scaffold.dart' show formatBytes;
 import 'file_viewer_screen.dart';
 import 'move_copy_destination_picker.dart';
@@ -638,7 +639,7 @@ class _FavoritesViewState extends State<FavoritesView> {
             }, childCount: favorites.length),
           ),
         ),
-      const SliverToBoxAdapter(child: SizedBox(height: 100)),
+      SliverToBoxAdapter(child: SizedBox(height: bottomBarClearance(context))),
     ];
 
     return PopScope(

lib/views/files_view.dart

@@ -39,11 +39,13 @@ import '../widgets/noo/lists/noo_selection_bar.dart';
 import '../widgets/noo/lists/noo_settings_row.dart';
 import '../widgets/noo/lists/noo_summary_card.dart';
 import '../widgets/noo/media/noo_grid_card.dart';
+import '../widgets/noo/nav/noo_bottom_bar.dart';
 import '../widgets/noo/noo_layout.dart';
 import '../widgets/noo/overlays/noo_sheet.dart';
 import '../widgets/share_sheet.dart';
 import '../widgets/sticky_header_delegate.dart';
 import '../widgets/synced_header_scaffold.dart' show formatBytes;
+import '../widgets/tabs/tab_state_slivers.dart';
 import 'file_viewer_screen.dart';
 import 'move_copy_destination_picker.dart';
 
@@ -815,6 +817,15 @@ class _FilesViewState extends State<FilesView> {
             }, childCount: browser.items.length),
           ),
         ),
+      // List/grid/table above only pad NooSpace.lg at the bottom - plenty
+      // once Scaffold shrinks the body above an attached bar, but floating
+      // draws the body behind the bar instead, so it needs the bar's own
+      // footprint added on top or the last row ends up under it.
+      if (context.watch<SettingsController>().bottomBarStyle ==
+          NooBottomBarStyle.floating)
+        SliverToBoxAdapter(
+          child: SizedBox(height: bottomBarClearance(context)),
+        ),
     ];
 
     return PopScope(

lib/views/photos_view.dart

@@ -30,6 +30,7 @@ import '../widgets/noo/overlays/noo_sheet.dart';
 import '../widgets/share_sheet.dart';
 import '../widgets/sort_menu_button.dart' show sortFieldLabel;
 import '../widgets/sticky_header_delegate.dart';
+import '../widgets/tabs/tab_state_slivers.dart';
 import 'file_viewer_screen.dart';
 import 'move_copy_destination_picker.dart';
 
@@ -346,9 +347,10 @@ class _PhotosViewState extends State<PhotosView> {
           ),
         ],
 
-      // Fixed clearance so the last row isn't hidden behind the floating
-      // nav bar, regardless of grid length.
-      const SliverToBoxAdapter(child: SizedBox(height: 100)),
+      // Clearance so the last row isn't hidden behind the nav bar,
+      // regardless of grid length - see `bottomBarClearance`'s own doc
+      // comment for why this has to be dynamic rather than a flat 100.
+      SliverToBoxAdapter(child: SizedBox(height: bottomBarClearance(context))),
     ];
 
     return PopScope(

lib/views/recent_view.dart

@@ -74,7 +74,7 @@ class _RecentViewState extends State<RecentView> {
         _buildDesktopTable(context, groups)
       else
         _buildMobileGroups(context, groups),
-      ...tabBottomInsetSlivers,
+      ...tabBottomInsetSlivers(context),
     ];
 
     return ColoredBox(

lib/views/shares_view.dart

@@ -120,7 +120,7 @@ class _SharesViewState extends State<SharesView> {
         _buildDesktopTable(context, shares)
       else
         _buildMobileList(context, shares),
-      ...tabBottomInsetSlivers,
+      ...tabBottomInsetSlivers(context),
     ];
 
     return ColoredBox(

lib/views/trash_view.dart

@@ -89,7 +89,7 @@ class _TrashViewState extends State<TrashView> {
         _buildDesktopTable(context, trash)
       else
         _buildMobileList(context, trash),
-      ...tabBottomInsetSlivers,
+      ...tabBottomInsetSlivers(context),
     ];
 
     return ColoredBox(