Scope the season's plant lookup to the season

ListReferencedPlants(includeRemoved=true) returned every plant the garden has
ever held, so drawing one season loaded a decade of catalog on a decade-old
garden. It also meant the plant list and the plop list were selected by different
rules, which is the kind of near-miss that stays correct only by accident.

It now takes the same year the plops do, so the two selections always agree.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ

internal/service/objects.go

@@ -271,7 +271,7 @@ func (s *Service) assembleFullFor(ctx context.Context, g *domain.Garden, year *i
 	if err != nil {
 		return nil, err
 	}
-	plants, err := s.store.ListReferencedPlants(ctx, g.ID, year != nil)
+	plants, err := s.store.ListReferencedPlants(ctx, g.ID, year)
 	if err != nil {
 		return nil, err
 	}

internal/service/objects_test.go

@@ -432,3 +432,59 @@ func TestSeasonYearIsBounded(t *testing.T) {
 		}
 	}
 }
+
+// TestSeasonPlantsAreScopedToTheYear — the plant list has to match the plops it
+// is there to render. A garden with a decade of history shouldn't load a decade
+// of catalog to draw one season, and a season shouldn't carry plants that had
+// nothing in the ground that year.
+func TestSeasonPlantsAreScopedToTheYear(t *testing.T) {
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "[email protected]")
+	g := seedGarden(t, s, owner)
+	bed := seedBed(t, s, owner, g.ID)
+	ctx := context.Background()
+
+	oldPlant := seedOwnPlant(t, s, owner, 15)
+	newPlant, err := s.CreatePlant(ctx, owner, PlantInput{
+		Name: "Later", Category: domain.CategoryHerb, SpacingCM: 20, Color: "#4a7c3f", Icon: "🌱",
+	})
+	if err != nil {
+		t.Fatalf("CreatePlant: %v", err)
+	}
+
+	plant2020, err := s.CreatePlanting(ctx, owner, bed.ID, PlantingInput{
+		PlantID: oldPlant.ID, XCM: -40, YCM: 0, RadiusCM: 20, PlantedAt: strPtr("2020-04-01"),
+	})
+	if err != nil {
+		t.Fatalf("CreatePlanting: %v", err)
+	}
+	if _, err := s.UpdatePlanting(ctx, owner, plant2020.ID, PlantingPatch{
+		SetRemovedAt: true, RemovedAt: strPtr("2020-09-01"),
+	}, plant2020.Version); err != nil {
+		t.Fatalf("remove: %v", err)
+	}
+	if _, err := s.CreatePlanting(ctx, owner, bed.ID, PlantingInput{
+		PlantID: newPlant.ID, XCM: 40, YCM: 0, RadiusCM: 20, PlantedAt: strPtr("2026-04-01"),
+	}); err != nil {
+		t.Fatalf("CreatePlanting: %v", err)
+	}
+
+	names := func(year int) []string {
+		t.Helper()
+		full, err := s.GardenFull(ctx, owner, g.ID, &year)
+		if err != nil {
+			t.Fatalf("GardenFull(%d): %v", year, err)
+		}
+		out := []string{}
+		for _, p := range full.Plants {
+			out = append(out, p.Name)
+		}
+		return out
+	}
+	if got := names(2020); len(got) != 1 || got[0] != oldPlant.Name {
+		t.Errorf("2020 plants = %v, want just %q", got, oldPlant.Name)
+	}
+	if got := names(2026); len(got) != 1 || got[0] != "Later" {
+		t.Errorf("2026 plants = %v, want just \"Later\"", got)
+	}
+}

internal/store/plants.go

@@ -27,21 +27,27 @@ func scanPlant(s scanner) (*domain.Plant, error) {
 // ListReferencedPlants returns the distinct plants used by a garden's plantings
 // — the catalog subset the editor needs to render them. Always a non-nil slice.
 //
-// includeRemoved widens it past the active plops to every plop the garden has
-// ever held, which is what a past season needs: a plant pulled last July is not
-// active, but its plops still have to render with the right icon and color.
-func (d *DB) ListReferencedPlants(ctx context.Context, gardenID int64, includeRemoved bool) ([]domain.Plant, error) {
-	activeOnly := ` AND pl.removed_at IS NULL`
-	if includeRemoved {
-		activeOnly = ``
+// year nil means the active plops only. A year widens it to the plops that were
+// in the ground THAT YEAR, which is what a past season needs: a plant pulled
+// last July is not active, but its plops still have to render with the right
+// icon and colour. It is scoped to the same year as the plops rather than to the
+// garden's whole history, so the two selections always agree and a decade-old
+// garden doesn't load a decade of catalog to draw one season.
+func (d *DB) ListReferencedPlants(ctx context.Context, gardenID int64, year *int) ([]domain.Plant, error) {
+	where := ` AND pl.removed_at IS NULL`
+	args := []any{gardenID}
+	if year != nil {
+		where = ` AND (pl.planted_at IS NULL OR pl.planted_at <= ?)
+		          AND (pl.removed_at IS NULL OR pl.removed_at >= ?)`
+		args = append(args, fmt.Sprintf("%04d-12-31", *year), fmt.Sprintf("%04d-01-01", *year))
 	}
 	rows, err := d.sql.QueryContext(ctx,
 		`SELECT DISTINCT `+qualifyColumns("p", plantColumns)+` FROM plants p
 		   JOIN plantings pl ON pl.plant_id = p.id
 		   JOIN garden_objects o ON o.id = pl.object_id
-		  WHERE o.garden_id = ?`+activeOnly+`
+		  WHERE o.garden_id = ?`+where+`
 		  ORDER BY p.id`,
-		gardenID,
+		args...,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("store: list referenced plants: %w", err)