feat: refactor StackView for dynamic grouping and add sorting controls to Deck Builder while reducing card size slider ranges.

docs/development/devlog/2025-12-18-020000_stack_sorting_sliders.md

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+# Work Plan - Stack View Sorting & Slider Updates
+
+## Request
+1.  **Slider Adjustment**: Decrease the scale of sliders globally.
+    *   New Min (0%) should be smaller (~50% of previous min?).
+    *   New Max (100%) should be equivalent to old 50%.
+2.  **Stack View Default Sort**: "Order for Color and Mana Cost" by default everywhere.
+3.  **Deck Builder Sorting**: Add UI to change sort order manually in Deck Builder.
+
+## Changes
+- **StackView.tsx**:
+  - Refactored to support dynamic `groupBy` logic (Type, Color, CMC, Rarity).
+  - Implemented categorization logic for Color, CMC, and Rarity.
+  - Set default `groupBy` to `'color'` (sorts by Color groups, then CMC within groups).
+  - Fixed syntax errors from previous edit.
+
+- **DeckBuilderView.tsx**:
+  - Added `groupBy` state (default `'color'`).
+  - Added "Sort:" dropdown to toolbar when in Stack View.
+  - Updated `CardsDisplay` to pass sorting preferences.
+  - Updated Slider range to `min="60" max="200"` (Default `60`).
+
+- **CubeManager.tsx**:
+  - Updated Slider range to `min="60" max="200"`.
+  - Updated default `cardWidth` to `60`.
+
+- **DraftView.tsx**:
+  - Updated Slider range to `min="0.35" max="1.0"`.
+  - Updated default `cardScale` to `0.35`.
+
+## Verification
+- Verified `StackView` defaults to Color grouping in `CubeManager` (implicitly via default prop).
+- Verified Deck Builder has sorting controls.
+- Verified all sliders allow for much smaller card sizes.