fix(wp7-02): normalize generated image dimensions

tests/unit/wp7-02-image-output-normalizer.test.ts

@@ -1,10 +1,13 @@
 import { describe, expect, it } from "vitest";
 
+import { GeminiFlashAdapter } from "../../apps/worker/src/ai-adapter-gemini-flash.js";
+import { GeminiProAdapter } from "../../apps/worker/src/ai-adapter-gemini-pro.js";
+import { GptImageAdapter } from "../../apps/worker/src/ai-adapter-gpt-image.js";
 import {
   gptImageRequestSizeForRatio,
   normalizeImageOutputToRatio,
   productDimensionsForRatio,
-} from "../../apps/worker/src/image-output-normalizer.js";
+} from "../../apps/worker/src/image-output-normalizer.mjs";
 
 const onePixelPng = Buffer.from(
   "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=",
@@ -39,4 +42,29 @@ describe("TDD-WP7-EXT-001 exact image output normalization", () => {
     expect(output.bytes.subarray(0, 8).toString("hex")).toBe("89504e470d0a1a0a");
     expect(productDimensionsForRatio("9:16")).toEqual({ pixelHeight: 1920, pixelWidth: 1080 });
   });
+
+  it("is used by all three production adapter boundaries", async () => {
+    const encoded = onePixelPng.toString("base64");
+    const adapters = [
+      new GeminiFlashAdapter({ transport: {
+        async start() { return { candidates: [{ inline_data: { data: encoded, mime_type: "image/png" }, pixelHeight: 1, pixelWidth: 1 }] }; },
+        async poll() { return {}; },
+      } }),
+      new GeminiProAdapter({ transport: {
+        async start() { return { operation: { done: true, response: { candidates: [{ inline_data: { data: encoded, mime_type: "image/png" }, pixelHeight: 1, pixelWidth: 1 }] } } }; },
+        async poll() { return {}; },
+      } }),
+      new GptImageAdapter({ transport: {
+        async start() { return { data: [{ b64_json: encoded, pixelHeight: 1, pixelWidth: 1 }] }; },
+        async poll() { return {}; },
+      } }),
+    ];
+    for (const adapter of adapters) {
+      const result = await adapter.start({
+        configSnapshot: {}, generationId: `normalization-${adapter.modelId}`, modelId: adapter.modelId,
+        prompt: "sanitized fixture", ratio: "1:1", referenceAssetIds: [],
+      });
+      expect(result).toMatchObject({ status: "completed", outputs: [{ mimeType: "image/png", pixelHeight: 1080, pixelWidth: 1080 }] });
+    }
+  });
 });