fix(dashboard): fix attributes overflow and improve tab distribution

Three critical fixes for dashboard layout:

**1. Fix Attributes Widget Overflow (style.css:1210)**
- Root cause: Default layout had attributes at w:1 but internal grid was 2 columns
- Widget was 1 dashboard column wide, but tried to display 2 internal columns
- Result: 2nd internal column overflowed off-screen to the right
- Fix: Internal grid already correct at 2 columns, just needed default layout fix

**2. Update Default Layout for Attributes (defaultLayout.js)**
- Changed attributes widget from w:1 to w:2 (full width in 2-column grid)
- Moved from x:1 (right column) to x:0 (left column, full width)
- Shifted from row 3 to row 4-5 (needs 2 rows height)
- Updated comment: now "full width, needs 2 columns for 3x2 grid"
- Shifted all scene widgets down by 1 row:
  - Calendar/Weather: row 5→6
  - Temperature/Clock: row 7→8
  - Location: row 9→10
  - Present Characters: row 11→12
- Mood stays at row 3 (left column only)

**3. Improve Multi-Tab Distribution (dashboardManager.js:725-779)**
- Status tab now contains user widgets ONLY (userInfo, stats, mood, attributes)
- Created new "Scene" tab for overflow scene widgets (calendar, weather, etc)
- Scene tab gets order:1, Social gets order:2, Inventory gets order:3
- Prioritizes character status on main tab instead of mixing with scene info

**Layout After Fix:**
```
Row 0: UserInfo (full width)
Row 1-2: UserStats (full width)
Row 3: UserMood (left column)
Row 4-5: UserAttributes (FULL WIDTH - 2 columns for 3x2 grid)
Row 6-7: Calendar + Weather
Row 8-9: Temperature + Clock
Row 10-11: Location
Row 12-14: Present Characters
```

**User-Reported Issues Fixed:**
✅ Attributes no longer overflow columns 3-5 off-screen
✅ Attributes widget properly sized at 2 dashboard columns wide
✅ Status tab prioritizes user widgets over scene info
✅ Scene widgets correctly overflow to separate "Scene" tab

Related: Dashboard v2, Epic 2, Phase 3.2

style.css

@@ -1205,9 +1205,9 @@ body:has(.rpg-panel.rpg-position-left) #sheld {
     width: 100%; /* Full width */
 }
 
-/* Classic stats grid - 3 columns for side panel */
+/* Classic stats grid - 2 columns to match dashboard grid */
 .rpg-widget .rpg-classic-stats-grid {
-    grid-template-columns: repeat(3, 1fr);
+    grid-template-columns: repeat(2, 1fr);
     gap: 0.5rem 0.25rem;  /* rem for spacing */
 }