feat(zones): rename tabs to zones across api, ui, and storage

Made-with: Cursor

src/models/device.py

@@ -2,7 +2,7 @@
 LED driver registry persisted in ``db/device.json``.
 
 Storage key and **id** field are the device **MAC**: 12 lowercase hex characters
-(no colons). **name** is for ``select`` / tabs (not unique). **address** is the
+(no colons). **name** is for ``select`` / zones (not unique). **address** is the
 reachability hint: same as MAC for ESP-NOW, or IP/hostname for Wi-Fi.
 """
 
@@ -160,7 +160,7 @@ class Device(Model):
         address=None,
         mac=None,
         default_pattern=None,
-        tabs=None,
+        zones=None,
         device_type="led",
         transport="espnow",
     ):
@@ -183,7 +183,7 @@ class Device(Model):
             "transport": tr,
             "address": addr,
             "default_pattern": default_pattern if default_pattern else None,
-            "tabs": list(tabs) if tabs else [],
+            "zones": list(zones) if zones else [],
         }
         self.save()
         return mac_hex
@@ -273,7 +273,7 @@ class Device(Model):
             "transport": "wifi",
             "address": ip,
             "default_pattern": None,
-            "tabs": [],
+            "zones": [],
         }
         self.save()
         return mac_hex