Implement UI for managing multiple models (#24023)

* Implement hardware detection and UI management

* Cleanup Frigate+ detection

* Don't count model as changed

* Fixes for audio map error

* Add descriptions

* Enforce that all model must exist

* Fix hardware picking

* Docs fixes

* WebUI cleanup

* Cleanup handling of scenes

* UI refinement

* Cleanup recommended UI

* test fixews

web/e2e/fixtures/mock-data/hardware.ts

@@ -0,0 +1,39 @@
+/**
+ * Detection hardware as reported by GET /api/hardware/probe.
+ *
+ * A mixed payload on purpose: two Corals exercise the per-unit checkboxes and
+ * the "already used by another model" state, while the Intel GPU exercises the
+ * unlimited detector-count dropdown.
+ */
+export const DETECTION_HARDWARE = [
+  {
+    key: "edgetpu:pci",
+    detector: "edgetpu",
+    name: "Coral EdgeTPU (PCIe)",
+    units: [
+      { device: "edgetpu:pci:0", label: "PCIe 0" },
+      { device: "edgetpu:pci:1", label: "PCIe 1" },
+    ],
+    count: 2,
+    unlimited: false,
+  },
+  {
+    key: "openvino:GPU",
+    detector: "openvino",
+    name: "Intel GPU",
+    units: [
+      { device: "openvino:GPU.0", label: "0000:00:02.0" },
+      { device: "openvino:GPU.1", label: "0000:03:00.0" },
+    ],
+    count: 2,
+    unlimited: true,
+  },
+  {
+    key: "cpu",
+    detector: "cpu",
+    name: "CPU",
+    units: [{ device: "cpu", label: "CPU" }],
+    count: 1,
+    unlimited: true,
+  },
+];