fix: update widget sizing for 1080p screens - Scene, Inventory, and Quests tabs

**Scene Tab (presentCharacters):**
- Desktop: 3×2 (wide and short, fits 1080p viewport)
- Mobile: 2×4 (narrow and tall for vertical stacking)

**Inventory Tab:**
- Desktop: 3×7 (full width, spacious) instead of 2×6
- Mobile: 2×5 (full width, compact)

**Quests Tab:**
- Desktop: 3×7 (full width, spacious) instead of 2×5
- Mobile: 2×5 (full width, compact)

All widgets now use full width at their respective column counts and
are properly sized to fit within 1080p screens without scrolling off.

src/systems/dashboard/widgets/presentCharactersWidget.js

@@ -276,19 +276,19 @@ export function registerPresentCharactersWidget(registry, dependencies) {
         description: 'Character cards with avatars, traits, and relationships',
         category: 'scene',
         minSize: { w: 2, h: 2 },
-        // Column-aware sizing: taller for better card display
+        // Column-aware sizing: narrow and tall on mobile, wide and short on desktop
         defaultSize: (columns) => {
             if (columns <= 2) {
                 return { w: 2, h: 4 }; // Mobile: 2 cols wide (full), 4 rows tall
             }
-            return { w: 2, h: 4 }; // Desktop: 2 cols wide, 4 rows tall
+            return { w: 3, h: 2 }; // Desktop: 3 cols wide (full), 2 rows tall (fits 1080p)
         },
-        // Column-aware max size: can expand on very wide screens
+        // Column-aware max size: can expand vertically if needed
         maxAutoSize: (columns) => {
             if (columns <= 2) {
                 return { w: 2, h: 5 };
             }
-            return { w: 3, h: 5 }; // Can expand to 3 cols wide on 4-col displays
+            return { w: 3, h: 3 }; // Desktop: can expand to 3 rows if needed
         },
         requiresSchema: false,