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/preset.py

@@ -7,6 +7,7 @@ from models.device import Device, normalize_mac
 from models.transport import get_current_sender
 from util.driver_delivery import deliver_json_messages, deliver_preset_broadcast_then_per_device
 from util.espnow_message import build_message, build_preset_dict
+from util.profile_bundle import export_preset_bundle, import_preset_bundle
 import json
 
 controller = Microdot()
@@ -50,6 +51,41 @@ async def list_presets(request, session):
     }
     return json.dumps(scoped), 200, {'Content-Type': 'application/json'}
 
+@controller.get('/<preset_id>/export')
+@with_session
+async def export_preset(request, session, preset_id):
+    """Export one preset as a JSON bundle."""
+    current_profile_id = get_current_profile_id(session)
+    preset = presets.read(preset_id)
+    if not preset or str(preset.get("profile_id")) != str(current_profile_id):
+        return json.dumps({"error": "Preset not found"}), 404, {'Content-Type': 'application/json'}
+    try:
+        bundle = export_preset_bundle(preset_id, presets)
+        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_preset(request, session):
+    """Import a preset 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, preset_data = import_preset_bundle(bundle, presets, current_profile_id)
+        return json.dumps({new_id: preset_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('/<preset_id>')
 @with_session
 async def get_preset(request, session, preset_id):