fix(agents): make image sanitization dimension configurable

src/agents/image-sanitization.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+import type { OpenClawConfig } from "../config/config.js";
+import { resolveImageSanitizationLimits } from "./image-sanitization.js";
+
+describe("image sanitization config", () => {
+  it("defaults when no config value exists", () => {
+    expect(resolveImageSanitizationLimits(undefined)).toEqual({});
+    expect(
+      resolveImageSanitizationLimits({ agents: { defaults: {} } } as unknown as OpenClawConfig),
+    ).toEqual({});
+  });
+
+  it("reads and normalizes agents.defaults.imageMaxDimensionPx", () => {
+    expect(
+      resolveImageSanitizationLimits({
+        agents: { defaults: { imageMaxDimensionPx: 1600.9 } },
+      } as unknown as OpenClawConfig),
+    ).toEqual({ maxDimensionPx: 1600 });
+  });
+});