fix: prefer OpenAI media for Codex defaults

extensions/openai/image-generation-provider.test.ts

@@ -194,6 +194,7 @@ describe("openai image generation provider", () => {
     const provider = buildOpenAIImageGenerationProvider();
 
     expect(provider.defaultModel).toBe("gpt-image-2");
+    expect(provider.aliases).toContain("openai-codex");
     expect(provider.models).toEqual([
       "gpt-image-2",
       "gpt-image-1.5",

extensions/openai/image-generation-provider.ts

@@ -537,6 +537,7 @@ function createOpenAIImageGenerationProviderBase(params: {
 }): ImageGenerationProvider {
   return {
     id: params.id,
+    aliases: ["openai-codex"],
     label: params.label,
     defaultModel: DEFAULT_OPENAI_IMAGE_MODEL,
     models: [...OPENAI_IMAGE_MODELS],

extensions/openai/video-generation-provider.test.ts

@@ -17,6 +17,12 @@ beforeAll(async () => {
 installProviderHttpMockCleanup();
 
 describe("openai video generation provider", () => {
+  it("declares the openai-codex alias for default-model ordering", () => {
+    const provider = buildOpenAIVideoGenerationProvider();
+
+    expect(provider.aliases).toContain("openai-codex");
+  });
+
   it("declares explicit mode capabilities", () => {
     expectExplicitVideoGenerationCapabilities(buildOpenAIVideoGenerationProvider());
   });

extensions/openai/video-generation-provider.ts

@@ -180,6 +180,7 @@ async function downloadOpenAIVideo(params: {
 export function buildOpenAIVideoGenerationProvider(): VideoGenerationProvider {
   return {
     id: "openai",
+    aliases: ["openai-codex"],
     label: "OpenAI",
     defaultModel: DEFAULT_OPENAI_VIDEO_MODEL,
     models: [DEFAULT_OPENAI_VIDEO_MODEL, "sora-2-pro"],