fix: improve inventory and quests widget resizing at narrow widths

Resolved issues where inventory and quests widgets didn't properly adapt
to narrow desktop widths (~296px, 2 columns):
- Assets tab was cut off (1/3 off-screen)
- Widgets shrank vertically instead of expanding
- Sub-tabs overflowed horizontally

Changes:

1. Widget onResize Handlers (inventoryWidget.js, questsWidget.js):
   - Strengthened inventory onResize to call render() for full re-layout
   - Added quests onResize handler with re-render + width-aware styling
   - Both apply responsive CSS classes at narrow widths

2. Increased maxAutoSize for 2-Column Layouts:
   - inventoryWidget.js: h: 6 → h: 8 (creates expansion headroom)
   - questsWidget.js: h: 5 → h: 7 (user requested height)
   - Previously: defaultSize = maxAutoSize → zero expansion possible
   - Now: defaultSize < maxAutoSize → widgets can expand vertically

3. Added Missing Quests Widget Container Styles (style.css):
   - Added .rpg-quests-widget and .rpg-quests-views flex container styles
   - Proper overflow handling (hidden on container, auto on content)
   - Prevents Assets tab horizontal cut-off

4. Implemented Compact Mode CSS (style.css):
   - .rpg-inventory-compact: reduced padding, icon-only sub-tabs
   - Applied when widget width < 6 grid units
   - Prevents 3 sub-tabs from overflowing 296px container
   - Icons remain visible, labels hidden for space savings

5. Grid Engine Boolean Return (gridEngine.js):
   - setContainerWidth now returns true/false for column changes
   - Allows DashboardManager to optimize resize handling

Why This Works:
- Auto-layout expansion requires defaultSize < maxAutoSize for headroom
- Flex container styles prevent overflow with proper scroll handling
- Compact mode makes sub-tabs fit within narrow containers
- onResize handlers ensure internal layouts adapt to dimension changes

Fixes: Assets tab cut-off, vertical shrinking, sub-tab overflow at ~296px

src/systems/dashboard/gridEngine.js

@@ -119,6 +119,7 @@ export class GridEngine {
      * Recalculates column count based on new width and notifies if changed.
      *
      * @param {number} width - Container width in pixels
+     * @returns {boolean} True if column count changed, false otherwise
      */
     setContainerWidth(width) {
         const oldColumns = this.columns;
@@ -131,7 +132,10 @@ export class GridEngine {
         if (oldColumns !== this.columns && this.onColumnsChange) {
             console.log('[GridEngine] Column count changed from', oldColumns, 'to', this.columns);
             this.onColumnsChange(this.columns, oldColumns);
+            return true; // Signal that columns changed
         }
+
+        return false; // Columns did NOT change
     }
 
     /**