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

Made-with: Cursor

src/models/zone.py

@@ -0,0 +1,62 @@
+import os
+import shutil
+
+from models.model import Model
+
+
+def _maybe_migrate_tab_json_to_zone():
+    """One-time copy ``db/tab.json`` → ``db/zone.json`` when upgrading."""
+    try:
+        base = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+        db_dir = os.path.join(base, "db")
+        zone_path = os.path.join(db_dir, "zone.json")
+        tab_path = os.path.join(db_dir, "tab.json")
+        if not os.path.exists(zone_path) and os.path.exists(tab_path):
+            shutil.copy2(tab_path, zone_path)
+            print("Migrated db/tab.json -> db/zone.json")
+    except OSError:
+        pass
+
+
+class Zone(Model):
+    """Preset layout row (stored in ``db/zone.json``); legacy storage was ``tab.json`` / Tab."""
+
+    def __init__(self):
+        if not getattr(Zone, "_migration_checked", False):
+            _maybe_migrate_tab_json_to_zone()
+            Zone._migration_checked = True
+        super().__init__()
+
+    def create(self, name="", names=None, presets=None):
+        next_id = self.get_next_id()
+        self[next_id] = {
+            "name": name,
+            "names": names if names else [],
+            "presets": presets if presets else [],
+            "default_preset": None,
+        }
+        self.save()
+        return next_id
+
+    def read(self, id):
+        id_str = str(id)
+        return self.get(id_str, None)
+
+    def update(self, id, data):
+        id_str = str(id)
+        if id_str not in self:
+            return False
+        self[id_str].update(data)
+        self.save()
+        return True
+
+    def delete(self, id):
+        id_str = str(id)
+        if id_str not in self:
+            return False
+        self.pop(id_str)
+        self.save()
+        return True
+
+    def list(self):
+        return list(self.keys())