rewrite selection system

packages/core/src/schema/index.ts

@@ -15,3 +15,6 @@ export type { AnyNodeType, AnyNodeId } from "./types";
 
 // Camera
 export { CameraSchema } from "./camera";
+
+// Zones
+export type { Zone, ZonePolygon } from "./zone";

packages/core/src/schema/zone.ts

@@ -0,0 +1,35 @@
+import dedent from "dedent";
+import { z } from "zod";
+import { objectId } from "./base";
+import { LevelNode } from "./nodes/level";
+
+// Polygon boundary for zone area - array of [x, z] coordinates
+export const ZonePolygon = z.array(z.tuple([z.number(), z.number()]));
+
+export const ZoneSchema = z
+  .object({
+    id: objectId("zone"),
+    object: z.literal("zone").default("zone"),
+    levelId: LevelNode.shape.id, // Required - must be attached to a level
+    name: z.string(),
+    // Polygon boundary - array of [x, z] coordinates defining the zone
+    polygon: ZonePolygon,
+    // Visual styling
+    color: z.string().default("#3b82f6"), // Default blue
+    metadata: z.json().optional().default({}),
+  })
+  .describe(
+    dedent`
+  Zone schema - a polygon zone attached to a level
+  - object: "zone"
+  - id: zone id
+  - levelId: level this zone is attached to
+  - name: zone name
+  - polygon: array of [x, z] points defining the zone boundary
+  - color: hex color for visual styling
+  - metadata: zone metadata (optional)
+  `,
+  );
+
+export type Zone = z.infer<typeof ZoneSchema>;
+export type ZonePolygon = z.infer<typeof ZonePolygon>;