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/util/espnow_message.py

@@ -113,6 +113,21 @@ def resolve_preset_background_hex(preset_data, palette_colors=None):
     return _hex_from_background_raw(bg_raw)
 
 
+def wire_n6(preset_data, default=0):
+    """Resolve style mode for the wire (``n6``); preset may store ``mode`` or ``n6``."""
+    if not isinstance(preset_data, dict):
+        return default
+    if preset_data.get("mode") is not None:
+        try:
+            return max(0, int(preset_data["mode"]))
+        except (TypeError, ValueError):
+            pass
+    try:
+        return max(0, int(preset_data.get("n6", default) or 0))
+    except (TypeError, ValueError):
+        return default
+
+
 def build_preset_dict(preset_data, palette_colors=None):
     """
     Convert preset data to API-compliant format.
@@ -188,7 +203,7 @@ def build_preset_dict(preset_data, palette_colors=None):
         "n3": preset_data.get("n3", 0),
         "n4": preset_data.get("n4", 0),
         "n5": preset_data.get("n5", 0),
-        "n6": preset_data.get("n6", 0)
+        "n6": wire_n6(preset_data),
     }
     
     return preset