Replace toxicity model with multi-label classifier

tests/settings.test.ts

@@ -24,4 +24,9 @@ describe("legacy settings", () => {
     expect(mergeSettings({ cpuThreads: 99 })).not.toHaveProperty("cpuThreads");
     expect(mergeSettings({ inferenceDevice: "webgpu" } as never)).not.toHaveProperty("inferenceDevice");
   });
+
+  it("defaults missing categories and removes invalid stored labels", () => {
+    expect(mergeSettings({}).enabledLabels).toEqual(DEFAULT_SETTINGS.enabledLabels);
+    expect(mergeSettings({ enabledLabels: ["threat", "threat", "unknown"] as never }).enabledLabels).toEqual(["threat"]);
+  });
 });