UI.21 One dock manager: a ribbon set becomes a palette and back; any tool group docks to a canvas edge, tabs, collapses, floats or takes a window

Owner 2026-11-09, on the reference at app.draftcraft.a Discord member: "the ability for a RIBBON set to turn into a palette, like in Adobe Photoshop or something similar, where you can dock panels/palettes, and in this particular case we can dock a ribbon to the top of the canvas." The idea: a ribbon group, a tool row, a toolbox group, Properties, the browser, the info box, the command line and a status strip are one thing, a DOCKABLE UNIT; a ribbon is units docked horizontally along the top of the canvas with a tab strip, a palette the same unit docked vertically in a side column, a tabbed panel several units in one slot, an icon rail a collapsed column, a floating palette a unit over the drawing, a window a unit on another monitor. Today each is its own block kind and code path (15 block kinds, four tear-off paths, the panel manager apart from the engine). Change: one dock manager in the shell (app-dock.js, grown from app-panels.js' dock / float / window logic and the engine's regions; SuperCad Studio's SC.2 panels, "everything is a panel that docks, tears off and groups", become a caller of it): zones = the four canvas edges plus the two panel columns, drawn as drop targets while dragging (UI.5); a unit dropped in a top or bottom zone lays out horizontally (the ribbon look), in a side zone vertically (icon + name rows, the palette look), on another unit it joins as a tab, on the rail it collapses to an icon, over the drawing it floats, past the window edge it tears off (UI.2/UI.3). The orientation belongs to the zone, the tools to the unit (format v2, UI.6), so the same Draw set is a ribbon group at the top and a palette at the side. The layout file says, per unit, which zone and in which order; the block kinds become presets of units in zones, so every built-in layout still reads and every adapter still fills them. Conformance: drag the Draw group from the ribbon to the left column and back in every app; a layout saved that way reloads the same.