HD Color Theory

- Converted History and Saved from copy-only text boxes into scrollable, clickable palette-card lists.
- History now stores staged Harmony Suggestion rows as reusable cards.
- Saved palettes now display as Harmony-style cards with color swatches and a Stage Again button.
- Added legacy History support so older single-dye history entries still display as reusable cards.
- Stage Again only fills the safe Base / Accent / Trim staging slots; it does not commit or spend dyes.
- Expanded the color wheel area by removing the fixed bottom History / Saved Palettes panel from the main wheel view.
- Added top navigation buttons next to Reset Size: Wheel, History, and Saved.
- Moved History and Saved Palettes into a larger full-window notes/list view.
- Added dot spacing logic to reduce color-wheel overlap and make manual dye selection easier.
- Moved Save Stage and Clear Staged beside the Base / Accent / Trim stage buttons.