Add styles for outliner item rename and update tests for scene document serialization

src/app/app.css

@@ -458,6 +458,27 @@ button:disabled {
   font-weight: 600;
 }
 
+.outliner-item__rename {
+  flex: 1 1 auto;
+  min-width: 0;
+  width: 100%;
+  padding: 2px 6px;
+  margin: -2px -6px;
+  color: var(--color-text);
+  font: inherit;
+  font-size: 0.82rem;
+  font-weight: 600;
+  background: rgba(7, 9, 13, 0.22);
+  border: 1px solid transparent;
+  border-radius: 8px;
+}
+
+.outliner-item__rename:focus {
+  outline: none;
+  background: rgba(7, 9, 13, 0.38);
+  border-color: rgba(207, 123, 66, 0.45);
+}
+
 .outliner-item__delete {
   flex: 0 0 auto;
   width: 22px;
@@ -479,11 +500,6 @@ button:disabled {
   transform: none;
 }
 
-.outliner-item__editor {
-  width: 100%;
-  gap: 6px;
-}
-
 .asset-item--action {
   display: flex;
   flex-direction: row;

tests/serialization/scene-document-json.test.ts

@@ -257,6 +257,7 @@ describe("scene document JSON", () => {
   it("round-trips a document containing an authored PlayerStart entity", () => {
     const playerStart = createPlayerStartEntity({
       id: "entity-player-start-main",
+      name: "Main Spawn",
       position: {
         x: 4,
         y: 0,
@@ -274,6 +275,32 @@ describe("scene document JSON", () => {
     expect(parseSceneDocumentJson(serializeSceneDocument(document))).toEqual(document);
   });
 
+  it("migrates version 14 documents without entity names", () => {
+    const pointLight = createPointLightEntity({
+      id: "entity-point-light-legacy",
+      position: {
+        x: 2,
+        y: 3,
+        z: 1
+      },
+      colorHex: "#ffeeaa",
+      intensity: 1.75,
+      distance: 9
+    });
+    const legacyDocument = {
+      ...createEmptySceneDocument({ name: "Legacy Entity Name Scene" }),
+      version: 14 as const,
+      entities: {
+        [pointLight.id]: pointLight
+      }
+    };
+
+    const migratedDocument = migrateSceneDocument(legacyDocument);
+
+    expect(migratedDocument.version).toBe(SCENE_DOCUMENT_VERSION);
+    expect(migratedDocument.entities[pointLight.id]).toEqual(pointLight);
+  });
+
   it("round-trips the initial typed entity registry without mixing entities into model instances", () => {
     const playerStart = createPlayerStartEntity({
       id: "entity-player-start-main"