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/models/zone.py

@@ -46,6 +46,22 @@ class Zone(Model):
         if changed:
             self.save()
 
+    @staticmethod
+    def _normalized_content_kind(doc):
+        if not isinstance(doc, dict):
+            return None
+        kind = doc.get("content_kind")
+        return kind if kind in ("presets", "sequences") else None
+
+    def _enforce_content_kind_invariants(self, doc):
+        """Presets-only zones hold no sequences; sequences-only hold no preset tiles."""
+        kind = self._normalized_content_kind(doc)
+        if kind == "presets":
+            doc["sequence_ids"] = []
+        elif kind == "sequences":
+            doc["presets"] = []
+            doc["presets_flat"] = []
+
     def create(self, name="", names=None, presets=None, group_ids=None, content_kind=None):
         next_id = self.get_next_id()
         gid_list = []
@@ -62,6 +78,9 @@ class Zone(Model):
         }
         if content_kind in ("presets", "sequences"):
             doc["content_kind"] = content_kind
+        if "sequence_ids" not in doc:
+            doc["sequence_ids"] = []
+        self._enforce_content_kind_invariants(doc)
         self[next_id] = doc
         self.save()
         return next_id
@@ -74,7 +93,9 @@ class Zone(Model):
         id_str = str(id)
         if id_str not in self:
             return False
-        self[id_str].update(data)
+        patch = data if isinstance(data, dict) else {}
+        self[id_str].update(patch)
+        self._enforce_content_kind_invariants(self[id_str])
         self.save()
         return True