fix(admin): harden clothing/pets/effects/clone imports

Align grids on data.items, only treat SSE done as success, hard-fail
clothing sets when libs fail, and add Cancel via AbortController.

Co-authored-by: Cursor <[email protected]>

src/lib/services/clothing-set-import.test.ts

@@ -87,4 +87,20 @@ describe("importClothingSet", () => {
 		const r = await importClothingSet({ setType: "ch", setId: 999999 });
 		expect(r.ok).toBe(false);
 	});
+
+	it("does not write set data when a required library import fails", async () => {
+		mergeSet.mockClear();
+		mergePalette.mockClear();
+		importSingleFigure.mockResolvedValueOnce({
+			ok: false,
+			lib: "shirt_M_x",
+			warnings: [],
+			error: "nitro missing",
+		});
+		const r = await importClothingSet({ setType: "ch", setId: 5000 });
+		expect(r.ok).toBe(false);
+		expect(r.error).toMatch(/required figure libraries failed/i);
+		expect(mergeSet).not.toHaveBeenCalled();
+		expect(mergePalette).not.toHaveBeenCalled();
+	});
 });