Adjust Scribe context menu to support tablet screens

- Support tap in addition to hover for context menu
- Improve clamping for greater screen sizes to avoid Scribe getting off screen
- Set a padding to 0 to avoid random padding depending on screen sizes

scribe/lib/scribe/ai/presentation/utils/modal/anchored_modal_layout_calculator.dart

@@ -154,10 +154,14 @@ class AnchoredModalLayoutCalculator {
     if (isTop) {
       final availableHeight = anchorPosition.dy - padding - gap;
       final positionBottom = screenSize.height - anchorPosition.dy + gap;
+      final clampedLeft = anchorPosition.dx.clamp(
+        padding,
+        screenSize.width - menuSize.width - padding,
+      );
 
       return AnchoredSuggestionLayoutResult(
         availableHeight: availableHeight,
-        left: anchorPosition.dx,
+        left: clampedLeft,
         bottom: positionBottom,
       );
     }

scribe/lib/scribe/ai/presentation/widgets/context_menu/ai_scribe_context_menu.dart

@@ -53,7 +53,7 @@ class _AiScribeContextMenuContentState extends State<AiScribeContextMenu> {
               widget.submenuController?.hide();
               widget.onActionSelected(menuAction);
             },
-            onHoverShowSubmenu: (itemKey) =>
+            onSelectCategory: (itemKey) =>
                 menuAction.submenuActions?.isNotEmpty == true
                     ? _showSubmenu(
                         context: context,

scribe/lib/scribe/ai/presentation/widgets/context_menu/ai_scribe_context_menu_item.dart

@@ -6,7 +6,7 @@ class AiScribeContextMenuItem extends StatefulWidget {
   final AiScribeContextMenuAction menuAction;
   final ImagePaths imagePaths;
   final ValueChanged<AiScribeContextMenuAction> onSelectAction;
-  final OnHoverShowSubmenu? onHoverShowSubmenu;
+  final OnHoverShowSubmenu onSelectCategory;
   final VoidCallback? onHoverOtherItem;
 
   const AiScribeContextMenuItem({
@@ -14,7 +14,7 @@ class AiScribeContextMenuItem extends StatefulWidget {
     required this.menuAction,
     required this.imagePaths,
     required this.onSelectAction,
-    this.onHoverShowSubmenu,
+    required this.onSelectCategory,
     this.onHoverOtherItem,
   });
 
@@ -44,7 +44,7 @@ class _AiScribeContextMenuItemState extends State<AiScribeContextMenuItem> {
           _hoverController?.enter();
 
           if (_itemKey != null) {
-            widget.onHoverShowSubmenu?.call(_itemKey!);
+            widget.onSelectCategory.call(_itemKey!);
           } else {
             widget.onHoverOtherItem?.call();
           }
@@ -55,7 +55,15 @@ class _AiScribeContextMenuItemState extends State<AiScribeContextMenuItem> {
         child: AiScribeMenuItem(
           itemKey: _itemKey,
           menuAction: widget.menuAction,
-          onSelectAction: widget.onSelectAction,
+          onSelectAction: (menuAction) {
+            if (menuAction.submenuActions?.isNotEmpty == true) {
+              if (_itemKey != null) {
+                widget.onSelectCategory.call(_itemKey!);
+              }
+            } else {
+              widget.onSelectAction(menuAction);
+            }
+          },
           imagePaths: widget.imagePaths,
         )
       );

scribe/lib/scribe/ai/presentation/widgets/context_menu/ai_scribe_submenu.dart

@@ -24,6 +24,7 @@ class AiScribeSubmenu extends StatelessWidget {
       clipBehavior: Clip.antiAlias,
       child: ListView.builder(
         shrinkWrap: true,
+        padding: EdgeInsets.zero,
         itemCount: menuActions.length,
         itemBuilder: (_, index) {
           final action = menuActions[index];