feat(ui): pattern modes, bundles, and zone content kind

Add profile/preset/sequence JSON import and export; map preset mode to
wire n6 with a mode dropdown for multi-mode patterns; zone edit shows
presets or sequences only with content_kind on save; update catalogue
and tests for merged pattern names.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/controllers/sequence.py

@@ -3,11 +3,14 @@ from microdot.session import with_session
 from models.sequence import Sequence
 from models.profile import Profile
 from models.transport import get_current_sender
+from models.preset import Preset
+from util.profile_bundle import export_sequence_bundle, import_sequence_bundle
 import json
 
 controller = Microdot()
 sequences = Sequence()
 profiles = Profile()
+presets = Preset()
 
 
 def get_current_profile_id(session=None):
@@ -39,6 +42,57 @@ async def list_sequences(request, session):
     return json.dumps(scoped), 200, {"Content-Type": "application/json"}
 
 
+@controller.get("/<id>/export")
+@with_session
+async def export_sequence(request, session, id):
+    """Export a sequence and referenced presets as a JSON bundle."""
+    current_profile_id = get_current_profile_id(session)
+    if not current_profile_id:
+        return json.dumps({"error": "No profile available"}), 404, {"Content-Type": "application/json"}
+    try:
+        bundle = export_sequence_bundle(
+            id,
+            sequences,
+            presets,
+            profile_id=current_profile_id,
+        )
+        return json.dumps(bundle), 200, {"Content-Type": "application/json"}
+    except ValueError as e:
+        return json.dumps({"error": str(e)}), 404, {"Content-Type": "application/json"}
+
+
+@controller.post("/import")
+@with_session
+async def import_sequence(request, session):
+    """Import a sequence bundle into the current profile."""
+    try:
+        current_profile_id = get_current_profile_id(session)
+        if not current_profile_id:
+            return (
+                json.dumps({"error": "No profile available"}),
+                404,
+                {"Content-Type": "application/json"},
+            )
+        body = request.json or {}
+        bundle = body.get("bundle") if isinstance(body, dict) else body
+        if not isinstance(bundle, dict):
+            return (
+                json.dumps({"error": "Expected JSON bundle"}),
+                400,
+                {"Content-Type": "application/json"},
+            )
+        new_id, seq_data = import_sequence_bundle(bundle, sequences, presets, current_profile_id)
+        return (
+            json.dumps({new_id: seq_data}),
+            201,
+            {"Content-Type": "application/json"},
+        )
+    except ValueError as e:
+        return json.dumps({"error": str(e)}), 400, {"Content-Type": "application/json"}
+    except Exception as e:
+        return json.dumps({"error": str(e)}), 400, {"Content-Type": "application/json"}
+
+
 @controller.get("/<id>")
 @with_session
 async def get_sequence(request, session, id):