Turns the canvas foundation into the real editor, loading a garden from the server and editing it with optimistic sync. Completes Phase 3. - lib/objects.ts: react-query over GET /gardens/:id/full + optimistic create/update/delete. Update applies to the cache up front and PATCHes with the row version; a 409 adopts the server's `current` row and toasts "updated elsewhere". One PATCH per gesture. - editor/store.ts: adds liveObject (in-gesture geometry, rendered instantly), armedKind (palette tap-to-place), and objectDragging (so the pan gesture stands down while an object drag owns the pointer). - editor/Palette.tsx + kinds.ts: the seven kinds with icons + default sizes; tap a kind, tap the canvas to place (works desktop + touch). - editor/SelectionOverlay.tsx: move (drag body), resize (corner handles, opposite corner fixed via the object-local frame so rotation is honored), rotate (knob, snaps to 15°, free with Shift). Each updates liveObject and fires one PATCH on release. - editor/Inspector.tsx: name, dimensions/position (unit-aware), rotation, color override (+ clear), plantable, notes, two-step delete. Commits per field; re-syncs from the object unless a field is focused. - GardenCanvas: placement, live-drag merge, z-ordered render, selection overlay, and ?focus=<id> frames an object on load. GardenEditorPage loads /full and lays out palette | canvas | inspector (bottom sheet on mobile). - components/ui/toast.tsx + Toaster in AppShell. Verified in a real browser against the embedded binary: place a bed → move, resize, rotate (rotate snapped to 60°) → set its name in the inspector → reload, all persisted; each gesture was exactly one PATCH (version 1→2→3→4→5); an out-of-band edit made the next drag 409 → rollback to the server's value + toast. tsc + 17 vitest tests green. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01JdQpdYYsTgtkJBxbcpAszi