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Milestone 72 phase D — the dashboard view IS the edit surface (operator ask): - /d/<id> renders the grid via Gridstack in STATIC mode — positioned exactly like before, live HTMX widget bodies keep polling. An "Edit" button flips the same grid interactive (grid.setStatic(false)) in place, so you drag/resize over real data. "Done" flips it back. Layout autosaves on change. - The widget picker is now a bottom drawer (position:fixed overlay) revealed by body.dash-editing — so the dashboard width is identical entering/leaving edit. - Add: POST returns a single grid item; JS inserts it + grid.makeWidget + htmx.process so it loads live data. Remove: POST 204 + grid.removeWidget. Per-panel drag handle + remove ✕ are in the DOM for editors, shown only while editing. - Gridstack loads for everyone (viewers get the static grid); edit wiring is gated on can_edit. Mobile collapses to one column. - Removed the separate /d/<id>/edit route + edit.html + _edit_panels.html (rule 22). Dashboard-list Edit and new-dashboard create now deep-link /d/<id>?edit=1 which opens edit mode on load. Browser-only behaviour — CI can't exercise it; needs an operator visual check. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>