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>

tests/test_binary_envelope.py

@@ -29,6 +29,21 @@ def test_pack_parse_v2_brightness_only():
     assert data == {"v": "1", "b": 128}
 
 
+def test_pack_parse_v2_mode_maps_to_n6():
+    raw = pack_binary_envelope_v2(
+        presets={
+            "m": {
+                "p": "meteor",
+                "c": ["#aabbcc"],
+                "mode": 2,
+                "n6": 0,
+            }
+        },
+    )
+    data = parse_binary_envelope_v2(raw)
+    assert data["presets"]["m"]["n6"] == 2
+
+
 def test_pack_parse_v2_full():
     raw = pack_binary_envelope_v2(
         presets={