Feature: Add interaction reach property and persistence tests for Player Start entity

tests/unit/entity-instances.test.ts

@@ -18,6 +18,7 @@ import {
   DEFAULT_PLAYER_START_CAPSULE_RADIUS,
   DEFAULT_PLAYER_START_CROUCH_SETTINGS,
   DEFAULT_PLAYER_START_EYE_HEIGHT,
+  DEFAULT_PLAYER_START_INTERACTION_REACH_METERS,
   DEFAULT_PLAYER_START_JUMP_SETTINGS,
   DEFAULT_PLAYER_START_MOVE_SPEED,
   DEFAULT_PLAYER_START_MOVEMENT_CAPABILITIES,
@@ -49,6 +50,7 @@ describe("entity registry defaults", () => {
       position: { x: 0, y: 0, z: 0 },
       yawDegrees: 0,
       navigationMode: "firstPerson",
+      interactionReachMeters: DEFAULT_PLAYER_START_INTERACTION_REACH_METERS,
       movementTemplate: {
         kind: "default",
         moveSpeed: DEFAULT_PLAYER_START_MOVE_SPEED,

tests/unit/player-start-inspector.integration.test.tsx

@@ -250,6 +250,56 @@ describe("Player Start inspector", () => {
     });
   });
 
+  it("persists the authored interaction reach for a selected Player Start", async () => {
+    const playerStart = createPlayerStartEntity({
+      id: "entity-player-start-interaction-reach",
+      name: "Interaction Reach"
+    });
+    const store = createEditorStore({
+      initialDocument: {
+        ...createEmptySceneDocument({ name: "Player Start Reach Scene" }),
+        entities: {
+          [playerStart.id]: playerStart
+        }
+      }
+    });
+
+    render(<App store={store} />);
+
+    await waitFor(() => {
+      expect(viewportHostInstances.length).toBeGreaterThan(0);
+    });
+
+    act(() => {
+      store.setSelection({
+        kind: "entities",
+        ids: [playerStart.id]
+      });
+    });
+
+    const reachInput = await screen.findByTestId(
+      "player-start-interaction-reach"
+    );
+
+    expect(reachInput).toHaveValue(1.5);
+
+    act(() => {
+      fireEvent.change(reachInput, {
+        target: {
+          value: "3.2"
+        }
+      });
+      fireEvent.blur(reachInput);
+    });
+
+    await waitFor(() => {
+      expect(store.getState().document.entities[playerStart.id]).toMatchObject({
+        kind: "playerStart",
+        interactionReachMeters: 3.2
+      });
+    });
+  });
+
   it("shows authored jump, sprint, and crouch bindings for a selected Player Start", async () => {
     const playerStart = createPlayerStartEntity({
       id: "entity-player-start-locomotion-bindings",