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_oci_operation_quiet.py

@@ -0,0 +1,75 @@
+"""While the OCI manager updates or recreates an application, the stop, the
+backup and the start of its containers are steps of that operation."""
+import json
+import sys
+import tempfile
+import time
+from pathlib import Path
+from types import SimpleNamespace
+import unittest
+
+SCRIPTS = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(SCRIPTS))
+import oci_operations
+
+
+def event(kind, vmid=None, severity='INFO', **data):
+    if vmid is not None:
+        data['vmid'] = str(vmid)
+    return SimpleNamespace(event_type=kind, severity=severity, data=data, entity_id=str(vmid or ''))
+
+
+class OperationQuietTests(unittest.TestCase):
+    def setUp(self):
+        tmp = tempfile.TemporaryDirectory()
+        self.addCleanup(tmp.cleanup)
+        self.root = tmp.name
+
+    def mark(self, vmid, started, ended=None):
+        Path(self.root, str(vmid)).write_text(json.dumps({'started': started, 'ended': ended}))
+
+    def test_the_steps_of_a_running_operation_are_quiet(self):
+        self.mark(115, time.time())
+        for kind in ('ct_shutdown', 'ct_stop', 'ct_start', 'ct_restart', 'backup_start', 'backup_complete'):
+            self.assertTrue(oci_operations.quiet(event(kind, 115), self.root), kind)
+
+    def test_another_container_is_still_reported(self):
+        self.mark(115, time.time())
+        self.assertFalse(oci_operations.quiet(event('ct_stop', 200), self.root))
+        self.assertFalse(oci_operations.quiet(event('ct_stop'), self.root))
+
+    def test_a_problem_is_never_silenced(self):
+        self.mark(115, time.time())
+        self.assertFalse(oci_operations.quiet(event('ct_stop', 115, severity='WARNING'), self.root))
+        self.assertFalse(oci_operations.quiet(event('ct_fail', 115), self.root))
+        self.assertFalse(oci_operations.quiet(event('backup_fail', 115), self.root))
+
+    def test_the_last_start_is_still_quiet_just_after_the_operation(self):
+        now = time.time()
+        self.mark(115, now - 60, ended=now - 60)
+        self.assertTrue(oci_operations.quiet(event('ct_start', 115), self.root))
+        self.mark(115, now - 3600, ended=now - 3600)
+        self.assertFalse(oci_operations.quiet(event('ct_start', 115), self.root))
+
+    def test_a_mark_left_by_a_dead_operation_expires(self):
+        self.mark(115, time.time() - 7 * 3600)
+        self.assertFalse(oci_operations.quiet(event('ct_stop', 115), self.root))
+
+    def test_the_working_copy_of_an_update_is_recognised_by_its_path(self):
+        archive = ('/usr/local/share/proxmenux/oci/instances/115/stack-transactions/abc/backup-117/'
+                   'vzdump-lxc-117-2026_10_02-20_45_41.tar.zst')
+        self.assertTrue(oci_operations.quiet(event('backup_complete', pve_message=archive), self.root))
+        self.assertFalse(oci_operations.quiet(
+            event('backup_complete', pve_message='/var/lib/vz/dump/vzdump-lxc-117-2026.tar.zst'), self.root))
+
+    def test_a_backup_of_several_guests_is_quiet_only_when_all_belong_to_the_operation(self):
+        self.mark(115, time.time())
+        self.mark(117, time.time())
+        both = event('backup_start', reason='VM/CT:\n  CT immich-server (115)\n  CT immich-db (117)')
+        mixed = event('backup_start', reason='VM/CT:\n  CT immich-db (117)\n  CT other (200)')
+        self.assertTrue(oci_operations.quiet(both, self.root))
+        self.assertFalse(oci_operations.quiet(mixed, self.root))
+
+
+if __name__ == '__main__':
+    unittest.main()