Align controller backend and data with new presets

Update palettes, profiles, tabs, preset sending, and ESPNow message format to match the new preset defaults and driver short-field schema.

src/models/pallet.py

@@ -6,22 +6,30 @@ class Palette(Model):
 
     def create(self, name="", colors=None):
         next_id = self.get_next_id()
-        self[next_id] = {
-            "name": name,
-            "colors": colors if colors else []
-        }
+        # Store palette as a simple list of colors; name is ignored.
+        self[next_id] = list(colors) if colors else []
         self.save()
         return next_id
 
     def read(self, id):
         id_str = str(id)
-        return self.get(id_str, None)
+        value = self.get(id_str, None)
+        # Backwards compatibility: if stored as {"colors": [...]}, unwrap.
+        if isinstance(value, dict) and "colors" in value:
+            return value.get("colors") or []
+        # Otherwise, expect a list of colors.
+        return value or []
     
     def update(self, id, data):
         id_str = str(id)
         if id_str not in self:
             return False
-        self[id_str].update(data)
+        # Accept either {"colors": [...]} or a raw list.
+        if isinstance(data, dict):
+            colors = data.get("colors", [])
+        else:
+            colors = data
+        self[id_str] = list(colors) if colors else []
         self.save()
         return True