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Edge-style tab groups for the DSH sidebar on Web and Desktop, with nested groups up to three levels, workspace tree, single-list view, recursive sorting, RGB colors, collapsed status summaries, subagent expansion with status, and an approval-gated agent tool for organizing groups.

Rebuilds the sidebar into a workspace / group / session tree with drag-to-group, per-row status and context rings, and resizable sidebars; the per-session cost column needs the dsh-claude-style plugin and shows — without it.