fix: update Scene tab widgets for proper sizing on reset layout

**Problem:**
Reset Layout button was shrinking Scene tab widgets (recentEvents and
presentCharacters) because widget definitions had defaultSize: 2x2 but
defaultLayout.js expected larger sizes (2x4 for characters).

**Changes:**

**presentCharactersWidget.js:**
- Change defaultSize from 2x2 to column-aware function
- Returns 2x4 at all column counts (taller for better card display)
- Update maxAutoSize to allow expansion to 3x5 on wide screens

**recentEventsWidget (infoBoxWidgets.js):**
- Change defaultSize to column-aware function
- Returns 2x2 at 2 columns, 3x2 at 3+ columns (full width)
- Add maxAutoSize for expansion capability

**defaultLayout.js Scene Tab:**
- Update all widgets to use 3-column width for desktop
- sceneInfo: 3x3 (was 2x2), positioned at y:0
- recentEvents: 3x2 (was 2x2), positioned at y:3 (below sceneInfo)
- presentCharacters: 3x4 (was 2x4), positioned at y:5 (below events)

**Result:**
- Scene tab widgets now properly sized on reset (no more shrinking)
- Widgets stack correctly without overlapping
- Full width utilization on wider screens (3 columns)
- Consistent behavior with Status tab responsive sizing

src/systems/dashboard/defaultLayout.js

@@ -90,35 +90,35 @@ export function generateDefaultDashboard() {
                 icon: 'fa-solid fa-map',
                 order: 1,
                 widgets: [
-                    // Row 0-1: Scene Info (combined: calendar, weather, temp, clock, location)
+                    // Row 0-2: Scene Info (combined: calendar, weather, temp, clock, location)
                     {
                         id: 'widget-sceneinfo',
                         type: 'sceneInfo',
                         x: 0,
                         y: 0,
-                        w: 2,
-                        h: 2,
+                        w: 3,
+                        h: 3,
                         config: {}
                     },
-                    // Row 2-3: Recent Events (notebook style, full width)
+                    // Row 3-4: Recent Events (notebook style, full width)
                     {
                         id: 'widget-recentevents',
                         type: 'recentEvents',
                         x: 0,
-                        y: 2,
-                        w: 2,
+                        y: 3,
+                        w: 3,
                         h: 2,
                         config: {
                             maxEvents: 3
                         }
                     },
-                    // Row 4-7: Present Characters (full width, will expand with auto-layout)
+                    // Row 5-8: Present Characters (full width, tall for cards)
                     {
                         id: 'widget-presentchars',
                         type: 'presentCharacters',
                         x: 0,
-                        y: 4,
-                        w: 2,
+                        y: 5,
+                        w: 3,
                         h: 4,
                         config: {
                             cardLayout: 'grid',