feat: make each plugin an npm workspace built by a termix-plugin CLI

plugins/host-metrics/tests/frontend/temperature-preference.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it } from "vitest";
+import {
+  selectTemperatureSensor,
+  temperaturePreferenceKey,
+} from "../../src/frontend/temperature-preference";
+
+const sensors = [
+  { label: "k10temp: Tctl", celsius: 55 },
+  { label: "nvme-pci-0100: Composite", celsius: 70 },
+];
+
+describe("temperature sensor preference", () => {
+  it("selects the configured sensor by its complete label", () => {
+    expect(selectTemperatureSensor(sensors, "k10temp: Tctl")).toEqual(
+      sensors[0],
+    );
+  });
+
+  it("falls back when a sensor disappears", () => {
+    expect(selectTemperatureSensor(sensors, "missing")).toBeNull();
+  });
+
+  it("scopes the preference to a host", () => {
+    expect(temperaturePreferenceKey(42)).toBe(
+      "termix-host-metrics:42:temperature-sensor",
+    );
+  });
+});