Add draggable splitter between APDU list and detail view

- Insert .splitter div between .apdu-list and .apdu-detail
- Replace flex:1 / max-height:40% with --detail-height CSS var
- Drag handler with clamp 10%-80%, persisted in localStorage
- Bump 1.22.12, SW cache v43->v44

tests/test_pcap_import.py

@@ -224,7 +224,7 @@ class TestImportEndpoint(unittest.TestCase):
 class TestVersion(unittest.TestCase):
     def test_package_version(self):
         from simtrace2_pysniff import __version__
-        self.assertEqual(__version__, '1.22.11')
+        self.assertEqual(__version__, '1.22.12')
 
     def test_status_includes_version(self):
         import os