Color Sets, Favorite Tools Bar, Freer Gesture Mapping

1. Color Sets Currently, saved colors all live in a single pool and the toolbar shows 5 at a time. The proposal is to allow organizing them into named sets (e.g. "Physics", "Annotations"). Switching between sets could work with a vertical swipe on the color strip in the toolbar.

2. Favorite Tools floating bar Tool settings (thickness, pressure sensitivity, color, type) are already remembered from the last use, which is great. What's missing is the ability to save multiple named presets and switch between them instantly. The proposal is a small floating bar where the user can pin specific, fully-configured tool presets. Switching tools mid-session currently means either losing the previous configuration or interrupting the flow to reconfigure manually.

3. Freer gesture and stylus button mapping The current gesture system already supports several actions, but the mapping options are too rigid. The request is simply to allow assigning any already-existing action to any finger gesture or stylus button. Since all the actions are already implemented, this should be relatively contained to add.

The main new action this would enable (and the most useful one) is Cycle Favorite Tool: being able to cycle through the pinned tools for those who don’t want the floating bar to appear in the UI