feat(oci): GPU selection per host and per image, one notification per update, and App tab for stack containers

- Immich asks what runs its video and its recognition in one menu, in both
  modes, and gives the GPU to the server and to Machine learning; AMD uses ROCm
- Frigate, Ollama, llama.cpp, Faster Whisper and Piper take the image built
  for the chosen GPU
- The acceleration menu offers only what the host can run
- An update or a recreation sends one notification with its result instead of
  the stop, backup and start of each container
- A private bridge with nothing connected is not reported as down
- Secondary containers of a stack appear in the App tab with their version and
  logo; Secure Gateway shows the same update state in both views
- A mistyped value in the wizard asks the same question again

AppImage/scripts/tests/test_idle_bridge.py

@@ -0,0 +1,39 @@
+"""A bridge with no port attached has no carrier and is not a failure: the
+private network of an application whose containers are stopped."""
+import sys
+import tempfile
+from pathlib import Path
+import unittest
+
+SCRIPTS = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(SCRIPTS))
+from health_monitor import HealthMonitor
+
+
+class IdleBridgeTests(unittest.TestCase):
+    def bridge(self, flags, ports=()):
+        tmp = tempfile.TemporaryDirectory()
+        self.addCleanup(tmp.cleanup)
+        folder = Path(tmp.name) / 'vmbr10'
+        (folder / 'brif').mkdir(parents=True)
+        (folder / 'flags').write_text(flags + '\n')
+        for port in ports:
+            (folder / 'brif' / port).mkdir()
+        return HealthMonitor._bridge_is_idle('vmbr10', tmp.name)
+
+    def test_an_up_bridge_with_no_port_is_idle(self):
+        self.assertTrue(self.bridge('0x1003'))
+
+    def test_a_bridge_with_ports_and_no_carrier_is_not_idle(self):
+        self.assertFalse(self.bridge('0x1003', ['enp3s0']))
+        self.assertFalse(self.bridge('0x1003', ['veth115i1']))
+
+    def test_a_bridge_set_down_is_not_idle(self):
+        self.assertFalse(self.bridge('0x1002'))
+
+    def test_an_interface_that_is_not_a_bridge_is_not_idle(self):
+        self.assertFalse(HealthMonitor._bridge_is_idle('vmbr10', '/nonexistent'))
+
+
+if __name__ == '__main__':
+    unittest.main()