web: simplify `?inline` handler for Storybook #26154

Job	Run time
lint (bandit)	2m 16s
test-migrations	2m 59s
lint (black)	2m 6s
lint (codespell)	1m 58s
test-migrations-from-stable - PostgreSQL 15-alpine	18m 51s
lint (pending-migrations)	2m 3s
test-migrations-from-stable - PostgreSQL 16-alpine	18m 40s
lint (ruff)	1m 45s
test-e2e (proxy)	8m 16s
test-e2e (oauth)	7m 43s
test-e2e (oauth-oidc)	6m 9s
test-e2e (saml)	6m 41s
test-e2e (ldap)	10m 21s
test-integration	5m 19s
test-e2e (radius)	5m 9s
test-e2e (scim)	3m 53s
test-e2e (flows)	5m 14s
test-unittest - PostgreSQL 15-alpine	17m 25s
test-unittest - PostgreSQL 16-alpine	20m 7s
ci-core-mark	1s
build (amd64)	7m 56s
build (arm64)	27m 41s
pr-comment	7s
	3h 2m 40s

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