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The deploy gate only installs chromium, so imaging had no browser-level coverage. Add two Playwright specs: - e2e/imaging/avatar-endpoint.spec.ts: HTTP contract for the avatar (/api/imaging/avatar), default (/imaging) and badge endpoints — animated APNG for a figure with an effect, the trailing-`.0` regression figure, ETag/304 revalidation, and a 400 for a malformed figure. Runs in the deploy gate automatically via the default Playwright config. - e2e/imaging/avatar-render.spec.ts: loads the avatar in a real browser and asserts it decodes at a non-zero size and animates. Navigates to the image URL directly so production CSP `upgrade-insecure-requests` cannot rewrite the request over a plain-HTTP host. Add playwright.imaging.config.ts running both across chromium, firefox and webkit, a `test:imaging` script, and a non-blocking CI job that installs all three engines and checks the live site.