Garden objects (beds, bags, containers, in-ground, trees, paths,
structures) in one polymorphic table, following the #7 service
conventions.

- store/objects.go: scanObject + Create (RETURNING), Get, ListForGarden
  (z_index order), version-guarded Update (RETURNING, returns current row
  on conflict), Delete (plantings cascade via FK).
- store/plantings.go + plants.go: the read side /full needs now —
  ListActivePlantingsForGarden (removed_at IS NULL) and
  ListReferencedPlants (distinct plants used by active plantings). Both
  return empty until #14 adds plantings; #12/#14 extend these files.
- service/objects.go: Create/Update(partial patch)/Delete/GardenFull, all
  (ctx, actorID, ...) through requireGardenRole(editor for mutations,
  viewer for /full). finalizeObject validates kind + shape (rect/circle;
  polygon reserved), finite dims in [1cm,100m], NaN/Inf rejection, loose
  bbox-overlaps-garden placement (partial overhang OK), hex color, valid
  JSON props, name/notes caps; normalizes rotation to [0,360). Plantable
  defaults by kind, overridable.
- api/objects.go: POST /gardens/:id/objects, PATCH/DELETE /objects/:id,
  GET /gardens/:id/full ({garden,objects,plantings,plants}). props is any
  JSON value stored as text; PATCH is partial + required version, 409
  returns the current row.

Tests: service (defaults, plantable-by-kind, rotation normalize,
validation rejects incl. off-field/polygon/bad-color/bad-props, partial
patch + version conflict, cross-user ErrNotFound, delete, /full shape) and
api (CRUD + /full, 409 envelope, cross-user 404, polygon/no-kind 400,
props round-trip).

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01JdQpdYYsTgtkJBxbcpAszi

@@ -81,6 +81,14 @@ func New(cfg *config.Config, svc *service.Service) *gin.Engine {
 	gardens.GET("/:id", h.getGarden)
 	gardens.PATCH("/:id", h.updateGarden)
 	gardens.DELETE("/:id", h.deleteGarden)
+	gardens.GET("/:id/full", h.gardenFull) // one-shot editor load

@@ -0,0 +34,4 @@
+// (absent = unchanged), plus the required current version. Kind and shape are
+// immutable and not accepted.
+type objectUpdateRequest struct {
+	Name        *string         `json:"name"`

@@ -0,0 +42,4 @@
+	RotationDeg *float64        `json:"rotationDeg"`
+	ZIndex      *int            `json:"zIndex"`
+	Plantable   *bool           `json:"plantable"`
+	Color       *string         `json:"color"`

@@ -0,0 +65,4 @@
+	}
+	var req objectCreateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "kind is required")

@@ -0,0 +97,4 @@
+	}
+	var req objectUpdateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "a current version is required")

@@ -0,0 +110,4 @@
+		ZIndex:      req.ZIndex,
+		Plantable:   req.Plantable,
+		Color:       req.Color,
+		Props:       propsFromRaw(req.Props),

@@ -0,0 +16,4 @@
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create garden: status %d, body %s", w.Code, w.Body.String())
+	}
+	return int64(decodeGarden(t, w.Body.Bytes())["id"].(float64))

@@ -0,0 +37,4 @@
+		t.Fatalf("create object: status %d, body %s", w.Code, w.Body.String())
+	}
+	obj := decodeGarden(t, w.Body.Bytes())
+	oid := int64(obj["id"].(float64))

@@ -0,0 +15,4 @@
+	maxObjectPropsLen = 20_000
+)
+
+// objectKinds is the set of valid garden_objects.kind values.

@@ -0,0 +79,4 @@
+		return nil, err
+	}
+
+	if !objectKinds[in.Kind] {

@@ -0,0 +115,4 @@
+
+// UpdateObject applies a partial, version-guarded patch to an object in a garden
+// the actor can edit. On a version mismatch it returns (current, ErrVersionConflict).
+func (s *Service) UpdateObject(ctx context.Context, actorID, objectID int64, patch ObjectPatch, version int64) (*domain.GardenObject, error) {

@@ -0,0 +193,4 @@
+	if p.Plantable != nil {
+		o.Plantable = *p.Plantable
+	}
+	if p.Color != nil {

@@ -0,0 +218,4 @@
+	if len(o.Name) > maxObjectNameLen || len(o.Notes) > maxObjectNotesLen {
+		return domain.ErrInvalidInput
+	}
+	if !validDimensionCM(o.WidthCM) || !validDimensionCM(o.HeightCM) {

@@ -0,0 +25,4 @@
+// ListActivePlantingsForGarden returns every currently-planted plop (removed_at
+// IS NULL) across all objects in a garden — the editor's one-shot load. Always a
+// non-nil slice (empty until plantings CRUD lands in #14). Plop CRUD itself is
+// #14; this is only the /full read side.

@@ -0,0 +33,4 @@
+		`SELECT pl.* FROM plantings pl
+		   JOIN garden_objects o ON o.id = pl.object_id
+		  WHERE o.garden_id = ? AND pl.removed_at IS NULL
+		  ORDER BY pl.id`,

@@ -0,0 +28,4 @@
+func (d *DB) ListReferencedPlants(ctx context.Context, gardenID int64) ([]domain.Plant, error) {
+	// p.* returns the plants columns in table-declared order, matching scanPlant.
+	rows, err := d.sql.QueryContext(ctx,
+		`SELECT DISTINCT p.* FROM plants p