feat: add disabled state UI for Recent Events widget

Show helpful message when Recent Events tracking is disabled in tracker config.

Changes:
- Check if recentEvents is enabled in trackerConfig before rendering
- If disabled, show dimmed widget with overlay message:
  - Info icon + explanation text
  - "Enable in Tracker Settings" button
  - Button opens Tracker Settings and switches to Info Box tab

UX Improvements:
- Widget opacity reduced to 0.6 to indicate disabled state
- Message centered with clear visual hierarchy
- Button has hover/active states with elevation feedback
- Clicking button directly navigates to the right settings location

Technical Implementation:
- attachDisabledStateHandlers() opens Tracker Settings modal
- Auto-switches to Info Box tab after 100ms delay
- Graceful fallback if button not found (console warning)

CSS Additions:
- .rpg-widget-disabled: Dimmed overlay state
- .rpg-widget-disabled-message: Centered message container
- .rpg-widget-enable-btn: Styled action button with hover effects

Benefits:
- Users immediately understand why Recent Events isn't updating
- One-click access to fix the issue
- Clear visual feedback about widget state
- Pattern can be reused for other widgets (Skills, etc.)

Next Steps:
- Apply this pattern to other widgets that depend on tracker config
- Consider adding similar disabled states for Skills, Stats, etc.

Related: Recent Events widget implementation, tracker config system

style.css

@@ -2776,6 +2776,72 @@ body:has(.rpg-panel.rpg-position-left) #sheld {
     opacity: 1;
 }
 
+/* Widget Disabled State */
+.rpg-widget-disabled {
+    position: relative;
+    opacity: 0.6;
+    pointer-events: none;
+}
+
+.rpg-widget-disabled-message {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    text-align: center;
+    padding: 1rem;
+    pointer-events: all;
+    z-index: 10;
+    width: 80%;
+}
+
+.rpg-widget-disabled-message i.fa-circle-info {
+    font-size: 2rem;
+    color: var(--rpg-highlight);
+    margin-bottom: 0.5rem;
+    display: block;
+    opacity: 0.8;
+}
+
+.rpg-widget-disabled-message p {
+    color: var(--rpg-text);
+    font-size: 0.875rem;
+    margin: 0.5rem 0;
+    opacity: 0.9;
+    line-height: 1.4;
+}
+
+.rpg-widget-enable-btn {
+    background: var(--rpg-accent);
+    color: white;
+    border: none;
+    border-radius: 0.375rem;
+    padding: 0.5rem 1rem;
+    font-size: 0.8125rem;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    margin-top: 0.5rem;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+
+.rpg-widget-enable-btn:hover {
+    background: var(--rpg-highlight);
+    transform: translateY(-1px);
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
+}
+
+.rpg-widget-enable-btn:active {
+    transform: translateY(0);
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
+}
+
+.rpg-widget-enable-btn i {
+    font-size: 1rem;
+}
+
 /* ============================================================================
    Scene Info Grid Widget
    Compact information-dense layout showing all scene data at once