Blender 5.0 compat + STB XML import + sequence/stamps improvements

- Fix Blender 5.0 API: active_sequence_strip → active_strip, bracket
  property access on AddonPreferences, _RestrictContext during register()
- Fix new_effect() frame_end → length for Blender 5.0
- Fix OTIO adapter kwargs (rate/ignore_timecode_mismatch only for cmx_3600)
- Fix OTIO global_start_time RationalTime → int conversion
- Add Import STB XML operator with movie strip import and XML patching
  for Storyboard Pro transitions missing <alignment>
- Add Create Sequence Strip operator (select shots → create sequence)
- Improve Set Stamps: channel at top, no conflict with existing strips,
  use raw strip names in templates
- TVSHOW episode fixes: sequence loading, episode creation
- Kitsu: new_asset, new_episode, admin_connect fix, gazu version pin
- Fix escape warnings in file_utils regex patterns
- Guard handler registration against duplicates

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/properties.py

@@ -299,7 +299,28 @@ def get_episodes_items(self, context):
 
 def on_episode_updated(self, context):
     settings = get_scene_settings()
-    os.environ['TRACKER_EPISODE_ID'] = settings.active_episode.id
+    project = settings.active_project
+    episode = settings.active_episode
+
+    if not episode or not episode.id:
+        return
+
+    os.environ['TRACKER_EPISODE_ID'] = episode.id
+
+    # Reload sequences for the selected episode (TVSHOW workflow)
+    prefs = get_addon_prefs()
+    tracker = prefs.tracker
+    if not tracker or not project:
+        return
+
+    project.sequences.clear()
+    try:
+        for seq in tracker.get_sequences(project.id, episode=episode.id):
+            item = project.sequences.add()
+            item.name = seq['name']
+            item.id = seq['id']
+    except Exception as e:
+        print(f'Could not load sequences for episode {episode.name}: {e}')
 
 class Project(PropertyGroup):
     id : StringProperty(default='')
@@ -715,7 +736,7 @@ class VSETB_PGT_strip_settings(PropertyGroup):
 
     @property
     def strip(self):
-        sequences = bpy.context.scene.sequence_editor.sequences_all
+        sequences = bpy.context.scene.sequence_editor.strips_all
         return next(s for s in sequences if s.vsetb_strip_settings == self)
 
     @property
@@ -808,7 +829,7 @@ def register():
         bpy.utils.register_class(cls)
         
     bpy.types.Scene.vsetb_settings = PointerProperty(type=VSETB_PGT_scene_settings)
-    bpy.types.Sequence.vsetb_strip_settings = PointerProperty(type=VSETB_PGT_strip_settings)
+    bpy.types.Strip.vsetb_strip_settings = PointerProperty(type=VSETB_PGT_strip_settings)
 
     #load_metadata_types()
     bpy.app.handlers.load_post.append(load_handler)
@@ -818,7 +839,7 @@ def unregister():
     for cls in reversed(classes):
         bpy.utils.unregister_class(cls)
 
-    del bpy.types.Sequence.vsetb_strip_settings
+    del bpy.types.Strip.vsetb_strip_settings
     del bpy.types.Scene.vsetb_settings
 
     bpy.app.handlers.load_post.remove(load_handler)