In next.config.mjs around line 26, the images remotePatterns entry allows
protocol:'http' hostname:'localhost' which should only be enabled in
development; modify the config to add the localhost/http pattern conditionally
based on an environment variable (e.g. process.env.NODE_ENV === 'development' or
a specific DEV flag) so that the localhost pattern is included only when that
flag is true, keeping production config free of the localhost entry and ensuring
remotePatterns is built from a base array plus the conditional localhost
pattern.

package.json around line 31: the dependency "@vercel/og": "^0.8.6" references a
non-existent 0.8.6 release; change it to a valid published version (e.g.,
"@vercel/og": "^0.8.5") or query the npm registry for the actual latest tag and
update the version range accordingly, then run your package manager
(npm/yarn/pnpm) to install and verify the lockfile updates.

In src/app/api/badge/components/Posts.tsx around lines 18 to 42, the component
calls posts.map without guarding against posts being undefined or null; add a
defensive check (e.g., default posts to an empty array via posts = posts ?? []
or use (posts || []).map(...) or return a safe empty state early) so the
component never calls map on undefined, keep the rendered structure the same
when posts is empty, and ensure the prop typing still accepts undefined if
necessary.

In src/app/api/badge/util.tsx around lines 8 to 20, the template-literal
Tailwind classes like text-[${parseInt(size)}px] and
leading-[${parseInt(lineHeight)}px] are generated at runtime and won't be picked
up by Tailwind/Satori; change the function to apply dynamic fontSize, lineHeight
and color via the style object (e.g., set fontSize, lineHeight, color alongside
fontFamily) and keep only static Tailwind classes in the tw string, or
alternatively add all possible generated classes to tailwind.config.js safelist
if you must keep them; update the returned object accordingly so dynamic values
are applied via inline styles or CSS variables rather than runtime Tailwind
class names.

In src/app/api/badge/util.tsx around line 22, loadFonts currently does a blind
fetch and may return undefined on network or HTTP errors; add proper error
handling by awaiting fetch once, checking response.ok, and throwing a
descriptive Error (including the URL and HTTP status) when fetch fails or
response is not ok, otherwise return the awaited arrayBuffer; ensure any thrown
errors propagate so callers can catch them or adjust the API to return a
Result/nullable explicitly.

In src/app/api/badge/util.tsx around lines 35 to 70, the code loads NotoBold and
NotoMedium but does not check whether the loads succeeded, which can pass
undefined into ImageResponse and cause runtime errors; update the function to
validate the loaded font buffers immediately after the await calls and handle
failures by either (1) throwing a clear, descriptive error (or logging and
returning an error response) if a required font is missing, or (2) supplying a
safe fallback (e.g., built-in system font buffer or omitting the fonts entry) so
that ImageResponse never receives undefined; finally ensure the fonts array only
includes entries with defined data and keep the existing names/weights.

In src/app/components/BadgeGenerator/index.tsx around line 6, uncomment the
import "import { ENVS } from '@/constants';" and replace both occurrences of the
hardcoded "http://localhost:3000" with ENVS.BASE_URL; for QRCode generation
follow the existing pattern so the URL becomes something like
`${ENVS.BASE_URL}/api/qr-login?token=${data?.token}` and update any other link
construction similarly to use ENVS.BASE_URL instead of the literal localhost
string.

In src/app/components/BadgeGenerator/index.tsx around lines 73 and 97, the API
base URL is hardcoded to http://localhost:3000 which will break in production;
replace both occurrences with a configurable environment variable (e.g. use
process.env.NEXT_PUBLIC_API_BASE or a similarly named NEXT_PUBLIC_* var exposed
to the client), defaulting to an empty string or safer fallback if undefined,
and construct the badge URL using that env var (ensuring to update both lines 73
and 97); make sure the env var is documented and available in production builds.