feat(dashboard): optimize 3-4 column desktop layout + fix mobile widget issues

DESKTOP LAYOUT OPTIMIZATION (3-4 columns):
- userInfo: Changed maxAutoSize from 2x1 to 1x2 (expands vertically)
- userStats: Changed to column-aware function, 3x3 in 3-4 col (full width horizontal)
- Layout: userInfo 1x2 (left) + mood 1x1 (top-right), stats 3x3 below (full width)
- Result: Better horizontal space utilization, less vertical stacking

MOBILE FIXES (Dashboard v2):
1. Refresh button visibility
   - Added #rpg-dashboard-container to CSS selector
   - Now shows with Dashboard v2, not just old panel UI

2. Stats widget Arousal bar clipping
   - Added padding-bottom: 0.5rem to .rpg-stats-grid
   - Prevents last stat bar from being cut off

3. Mood conditions text too small
   - Increased from 0.45rem to 0.6rem with line-height 1.2
   - "Focused, Awakening Qi" now readable under emoji

AFFECTED:
- userInfoWidget.js: maxAutoSize 1x2 for desktop vertical expansion
- userStatsWidget.js: Column-aware maxAutoSize function (2x2 mobile, 3x3 desktop)
- style.css: Mobile refresh visibility, stats padding, mood text size

src/systems/dashboard/widgets/userInfoWidget.js

@@ -39,12 +39,12 @@ export function registerUserInfoWidget(registry, dependencies) {
         category: 'user',
         minSize: { w: 1, h: 1 },
         defaultSize: { w: 1, h: 1 }, // Start compact (1x1), expansion will grow it based on columns
-        // Column-aware max size: mobile (2-col) stays 1x1, desktop (3-4 col) can expand to 2x1
+        // Column-aware max size: mobile (2-col) stays 1x1, desktop (3-4 col) expands vertically to 1x2
         maxAutoSize: (columns) => {
             if (columns <= 2) {
                 return { w: 1, h: 1 }; // Mobile: stay compact to allow mood widget beside it
             }
-            return { w: 2, h: 1 }; // Desktop: can span 2 columns
+            return { w: 1, h: 2 }; // Desktop: expand vertically, mood fits top-right
         },
         requiresSchema: false,