chore: import upstream snapshot with attribution

tests/unit/image-compat-node-alias-shadow.test.ts

@@ -0,0 +1,80 @@
+/**
+ * Regression test — ported from decolua/9router commit 047fdc89:
+ *   "fix(image): prevent compatible nodes from shadowing provider aliases"
+ *
+ * A user-defined openai-compatible provider node with `prefix: "cf"` must NOT
+ * shadow the built-in `cloudflare-ai` provider (alias `cf`). Cloudflare image
+ * routes like `cf/@cf/black-forest-labs/...` must keep resolving to the
+ * built-in cloudflare-ai provider, regardless of any compatible-node prefix
+ * collision.
+ *
+ * Inverse case: a non-reserved compatible-node prefix (e.g. `oct`) must still
+ * resolve to the compatible node. The fix is a reserved-prefix guard — it must
+ * not break user-defined prefixes that don't collide with built-in aliases.
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(
+  path.join(os.tmpdir(), "omniroute-image-compat-shadow-")
+);
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const core = await import("../../src/lib/db/core.ts");
+const providersDb = await import("../../src/lib/db/providers.ts");
+const { getModelInfo } = await import("../../src/sse/services/model.ts");
+
+test.before(async () => {
+  await providersDb.createProviderNode({
+    id: "openai-compatible-cf-collision",
+    type: "openai-compatible",
+    name: "Compatible CF Collision",
+    prefix: "cf",
+    baseUrl: "https://compatible.test/v1",
+    chatPath: "/v1/chat/completions",
+    modelsPath: "/v1/models",
+  });
+  await providersDb.createProviderNode({
+    id: "openai-compatible-oct-passthrough",
+    type: "openai-compatible",
+    name: "Compatible OCT",
+    prefix: "oct",
+    baseUrl: "https://compatible-oct.test/v1",
+    chatPath: "/v1/chat/completions",
+    modelsPath: "/v1/models",
+  });
+});
+
+test.after(() => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+});
+
+test("compatible node with prefix=cf must NOT shadow the built-in cloudflare-ai alias", async () => {
+  const info = (await getModelInfo("cf/@cf/black-forest-labs/flux-2-klein-9b")) as {
+    provider?: string;
+    model?: string;
+  };
+  assert.equal(
+    info.provider,
+    "cloudflare-ai",
+    "cf/ must keep routing to the built-in cloudflare-ai provider (not the compatible node)"
+  );
+  assert.equal(info.model, "@cf/black-forest-labs/flux-2-klein-9b");
+});
+
+test("non-reserved compatible-node prefix (oct) still routes to the compatible node", async () => {
+  const info = (await getModelInfo("oct/gpt-image-1")) as {
+    provider?: string;
+    model?: string;
+  };
+  assert.equal(
+    info.provider,
+    "openai-compatible-oct-passthrough",
+    "user-defined prefixes that don't collide with built-in aliases must still resolve to the compatible node"
+  );
+  assert.equal(info.model, "gpt-image-1");
+});