Add field editor: palette, select/move/resize/rotate, inspector, sync (#11)

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

web/src/editor/store.ts

@@ -1,9 +1,10 @@
 import { create } from 'zustand'
 import type { Viewport } from '@/lib/geometry'
+import type { EditorObject } from './types'
 
 // Ephemeral editor state only (per DESIGN § State): the viewport, the current
-// selection, and which object is "focused" (zoomed into for plops, #15). All
-// server state stays in react-query. Selection interactions grow in #11.
+// selection, the object being live-edited mid-gesture, and the palette kind
+// armed for tap-to-place. All server state stays in react-query.
 
 export const MIN_SCALE = 0.05 // px per cm — fully zoomed out
 export const MAX_SCALE = 20 // px per cm — fully zoomed in
@@ -17,16 +18,39 @@ interface EditorState {
 
   focusedObjectId: number | null
   setFocusedObject: (id: number | null) => void
+
+  // During a move/resize/rotate, the object's live geometry is held here so the
+  // canvas renders it instantly; the PATCH fires only on gesture end.
+  liveObject: EditorObject | null
+  setLiveObject: (o: EditorObject | null) => void
+
+  // The palette kind armed for tap-to-place (mobile-friendly; also set while
+  // dragging a kind from the palette). null when nothing is armed.
+  armedKind: string | null
+  setArmedKind: (kind: string | null) => void
+
+  // True while an object move/resize/rotate is in progress, so the viewport's
+  // pan gesture stands down (both listen on the same svg).
+  objectDragging: boolean
+  setObjectDragging: (v: boolean) => void
 }
 
 export const useEditorStore = create<EditorState>((set) => ({
   viewport: { tx: 0, ty: 0, scale: 1 },
-  setViewport: (next) =>
-    set((s) => ({ viewport: typeof next === 'function' ? next(s.viewport) : next })),
+  setViewport: (next) => set((s) => ({ viewport: typeof next === 'function' ? next(s.viewport) : next })),
 
   selectedId: null,
   select: (id) => set({ selectedId: id }),
 
   focusedObjectId: null,
   setFocusedObject: (id) => set({ focusedObjectId: id }),
+
+  liveObject: null,
+  setLiveObject: (o) => set({ liveObject: o }),
+
+  armedKind: null,
+  setArmedKind: (kind) => set({ armedKind: kind }),
+
+  objectDragging: false,
+  setObjectDragging: (v) => set({ objectDragging: v }),
 }))