fix: apply widget responsive classes on tab switch

Fixed issue where compact mode styling was lost when switching tabs.
Widgets now consistently show icon-only buttons and truncated headers
at narrow widths, regardless of how they were rendered.

Root Cause:
- onTabChange() rendered widgets but never called onResize handlers
- Compact classes (.rpg-inventory-compact, .rpg-quests-compact) only applied:
  * After auto-arrange (explicit onResize calls)
  * During window resize (ResizeObserver triggers)
- Tab switches rendered widgets fresh WITHOUT compact classes
- Result: Buttons/headers overflowed after tab switch at narrow widths

Changes:

1. dashboardManager.js onTabChange() (lines 1224-1233):
   - Added onResize handler calls after rendering tab widgets
   - Iterates this.widgets Map (currently rendered widgets)
   - Calls definition.onResize(element, w, h) for each widget
   - Applies responsive styling based on widget dimensions

2. questsWidget.js onResize() (lines 463-468):
   - Added .rpg-quests-compact class application at < 3 grid units
   - Toggles between wide/compact modes based on width

3. style.css compact mode styling:
   - Inventory: icon-only buttons (font-size: 0), truncated headers
   - Quests: icon-only buttons (font-size: 0), truncated headers
   - Headers max-width: 140px (inventory), 120px (quests)
   - Buttons: 32×32px icon-only with restored icon size

Flow Now:
1. Window resize → onResize called → compact classes applied ✓
2. Auto-arrange → onResize called → compact classes applied ✓
3. Tab switch → onResize called → compact classes applied ✓ (NEW)

All three paths now apply responsive styling consistently.

Fixes: "Add Item" button cut-off and header overflow after auto-arrange
or tab switching at narrow widths (~296px, 2 columns)

style.css

@@ -7684,6 +7684,36 @@ body:has(.rpg-panel.rpg-position-left) #sheld {
     margin: 0;
 }
 
+/* Compact mode: truncate long header titles */
+.rpg-inventory-compact .rpg-inventory-header h4 {
+    font-size: 0.9rem;
+    max-width: 140px; /* Constrain to prevent overflow */
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+/* Compact mode: reduce header action button sizes */
+.rpg-inventory-compact .rpg-inventory-header-actions {
+    gap: 0.5rem; /* Reduced from 0.75rem */
+}
+
+.rpg-inventory-compact .rpg-inventory-add-btn {
+    font-size: 0; /* Hide text, show icon only */
+    padding: 0.4rem;
+    min-width: 32px;
+    min-height: 32px;
+}
+
+.rpg-inventory-compact .rpg-inventory-add-btn i {
+    font-size: 1rem; /* Restore icon size */
+}
+
+.rpg-inventory-compact .rpg-view-toggle-btn {
+    padding: 0.4rem;
+    min-width: 32px;
+}
+
 /* ============================================
    QUESTS SYSTEM STYLING
    ============================================ */
@@ -7956,6 +7986,34 @@ body:has(.rpg-panel.rpg-position-left) #sheld {
     gap: 1rem;
 }
 
+/* Quest widget compact mode (narrow widths, < 3 grid units) */
+.rpg-quests-compact .rpg-quest-section-title {
+    font-size: 0.95rem;
+    max-width: 120px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.rpg-quests-compact .rpg-quest-header {
+    gap: 0.5rem; /* Reduced from default */
+}
+
+.rpg-quests-compact .rpg-add-quest-btn {
+    font-size: 0; /* Hide text, show icon only */
+    padding: 0.4rem;
+    min-width: 32px;
+    min-height: 32px;
+}
+
+.rpg-quests-compact .rpg-add-quest-btn i {
+    font-size: 1rem; /* Restore icon size */
+}
+
+.rpg-quests-compact .rpg-quest-item {
+    padding: 0.5rem; /* Reduced padding */
+}
+
 /* Mobile Responsive Styles */
 @media (max-width: 768px) {
     .rpg-quests-subtabs {