SETTINGS-35: species $/bdft in Settings + taxonomy parent fix (#76)

Add Settings species pricing UI (children of Species grouper by slug,
never hardcoded ids). Map Woo REST parent→parent_id on taxonomy sync;
upsert categories so slab FKs survive re-sync. Tests: parent map, FK-safe
sync, TV-8 0.96×12.50→12.00, Playwright mock e2e. UAT verified on 5060.

backend/tests/test_woo.py

@@ -141,6 +141,75 @@ def test_anchor_stable_across_identical_syncs(db_dir):
     assert r1["taxonomy_anchor"] == r2["taxonomy_anchor"]
 
 
+def test_sync_maps_woo_parent_field_to_parent_id(db_dir):
+    """Woo REST categories use `parent` (0 = top-level), not `parent_id`.
+
+    Live UAT lost hierarchy when sync only read parent_id (SETTINGS-35 / METADATA-10).
+    Fixture ids are local to this test — not production store ids.
+    """
+    cats = (
+        200,
+        {"X-WP-TotalPages": "1"},
+        json.dumps(
+            [
+                {"id": 10, "name": "Species", "slug": "species", "parent": 0},
+                {"id": 11, "name": "Cedar", "slug": "cedar", "parent": 10},
+                {"id": 20, "name": "Wood category", "slug": "wcat", "parent": 0},
+                {"id": 21, "name": "Live edge wood", "slug": "liveedge", "parent": 20},
+            ]
+        ).encode(),
+    )
+    tags = (200, {"X-WP-TotalPages": "1"}, b"[]")
+    attrs = (200, {"X-WP-TotalPages": "1"}, b"[]")
+    c, _ = _client([cats, tags, attrs])
+    taxonomy_mod.sync(c, db_mod.get_connection())
+    conn = db_mod.get_connection()
+    rows = {
+        r[0]: {"name": r[1], "slug": r[2], "parent_id": r[3], "woo_id": r[4]}
+        for r in conn.execute("SELECT id, name, slug, parent_id, woo_id FROM woo_categories")
+    }
+    assert rows[10]["parent_id"] is None
+    assert rows[11]["parent_id"] == 10
+    assert rows[20]["parent_id"] is None
+    assert rows[21]["parent_id"] == 20
+    # woo_id falls back to Woo category id when the payload has no woo_id field
+    assert rows[11]["woo_id"] == 11
+
+
+def test_sync_with_slab_species_fk_does_not_fail(db_dir):
+    """Live UAT: DELETE woo_categories fails when a slab still points at species_id."""
+    conn = db_mod.get_connection()
+    conn.execute(
+        "INSERT INTO woo_categories(id,name,slug,parent_id,woo_id) VALUES (11,'Old Cedar','old-cedar',NULL,11)"
+    )
+    conn.execute(
+        "INSERT INTO slabs(id, status, species_id, server_rev, created_at, updated_at) "
+        "VALUES ('slab-fk-1', 'draft', 11, 1, 't', 't')"
+    )
+    conn.commit()
+
+    cats = (
+        200,
+        {"X-WP-TotalPages": "1"},
+        json.dumps(
+            [
+                {"id": 10, "name": "Species", "slug": "species", "parent": 0},
+                {"id": 11, "name": "Cedar", "slug": "cedar", "parent": 10},
+            ]
+        ).encode(),
+    )
+    tags = (200, {"X-WP-TotalPages": "1"}, b"[]")
+    attrs = (200, {"X-WP-TotalPages": "1"}, b"[]")
+    c, _ = _client([cats, tags, attrs])
+    taxonomy_mod.sync(c, conn)
+    rows = {
+        r[0]: r[3]
+        for r in conn.execute("SELECT id, name, slug, parent_id FROM woo_categories")
+    }
+    assert rows[11] == 10  # parent mapped; row kept for FK
+    assert conn.execute("SELECT species_id FROM slabs WHERE id='slab-fk-1'").fetchone()[0] == 11
+
+
 def test_403_raises_forbidden_error(db_dir):
     def fake_request(url, method, data, headers):
         raise WooForbiddenError("request forbidden (403)")