feat(dashboard): implement smart widget scaling and improved auto-layout

- Add resetWidgetSizesToDefault() to reset all widgets to default sizes before auto-arrange/reset
- Implement continuous expansion algorithm that fills available space up to maxAutoSize limits
- Add visible height detection to prevent widgets expanding beyond viewport (no forced scroll)
- Update all widget defaultSize and maxAutoSize for optimal 1x1 compact layouts
  - Info widgets (calendar, weather, temp, clock): 1x1 default, 1x2 max
  - Location: 2x2 max (was 3x3)
  - Characters: 3x5 max, moved to 'scene' category (eliminates Social tab)
  - User Info: 2x1 max (prevents expansion)
  - User Mood: 1x1 default and max (compact top-right placement)
  - User Attributes: 3x5 max (fills bottom space)
  - User Stats: 3x3 max
- Fix CSS scaling for 1x1 widgets
  - Replace viewport-based units with fixed rem values
  - Reduce icon/graphic sizes to fit with visible text
  - Add explicit gaps and padding for consistent spacing
  - Set line-height: 1 to prevent text overflow
- Reorganize default layout
  - Status tab: User Info (2x1) + Mood (1x1 top right) + Stats + Attributes
  - Scene tab: Info widgets (1x1) + Location + Characters (all on one tab)
  - Inventory tab: Full inventory widget

Auto-arrange and reset now properly size widgets to defaults and expand to fill
available space without exceeding visible area.

src/systems/dashboard/dashboardManager.js

@@ -1183,6 +1183,15 @@ export class DashboardManager {
         await this.persistence.resetToDefault(this.defaultLayout);
         this.applyDashboardConfig(this.defaultLayout);
 
+        // Reset all widgets to default sizes
+        const allWidgets = [];
+        this.dashboard.tabs.forEach(tab => {
+            if (tab.widgets && tab.widgets.length > 0) {
+                allWidgets.push(...tab.widgets);
+            }
+        });
+        this.resetWidgetSizesToDefault(allWidgets);
+
         // Auto-layout each tab to prevent overlap (default positions may have changed)
         this.dashboard.tabs.forEach(tab => {
             if (tab.widgets && tab.widgets.length > 0) {
@@ -1212,6 +1221,28 @@ export class DashboardManager {
         this.defaultLayout = layout;
     }
 
+    /**
+     * Reset all widgets to their default sizes
+     * @param {Array} widgets - Widgets to reset
+     */
+    resetWidgetSizesToDefault(widgets) {
+        let resetCount = 0;
+        widgets.forEach(widget => {
+            const definition = this.registry.get(widget.type);
+            if (definition && definition.defaultSize) {
+                const oldSize = `${widget.w}x${widget.h}`;
+                widget.w = definition.defaultSize.w;
+                widget.h = definition.defaultSize.h;
+                const newSize = `${widget.w}x${widget.h}`;
+                if (oldSize !== newSize) {
+                    console.log(`[DashboardManager] Reset ${widget.type} from ${oldSize} to ${newSize}`);
+                    resetCount++;
+                }
+            }
+        });
+        console.log(`[DashboardManager] Reset ${resetCount} widgets to default sizes`);
+    }
+
     /**
      * Auto-layout widgets on current tab to efficiently use all available space
      *
@@ -1221,6 +1252,7 @@ export class DashboardManager {
      *
      * @param {Object} options - Layout options
      * @param {boolean} [options.preferFullWidth=true] - Prefer full-width widgets when possible
+     * @param {boolean} [options.resetSizes=true] - Reset widgets to default sizes before layout
      */
     autoLayoutWidgets(options = {}) {
         console.log('[DashboardManager] Auto-layout widgets requested');
@@ -1241,6 +1273,11 @@ export class DashboardManager {
 
         console.log(`[DashboardManager] Total widgets to layout: ${allWidgets.length}`);
 
+        // Reset widget sizes to defaults (unless explicitly disabled)
+        if (options.resetSizes !== false) {
+            this.resetWidgetSizesToDefault(allWidgets);
+        }
+
         // Smart category-aware sorting BEFORE auto-layout
         const widgetsToLayout = this.sortWidgetsByCategory(allWidgets);