The manual Frontend editor, wizard and visual ACL builder hard-rejected the ACL
`-f <file>` flag while bulk import accepted it. Worse, a frontend imported with
an `-f` ACL could not be edited at all (422) until the ACL was dropped.
The original guard predated the fail-safe apply flow: the agent runs `haproxy -c`
before every reload, so a missing pattern file is rejected safely and the previous
config keeps running. Pattern files are operator-managed host files — the same
policy adopted for SPOE filter configs in v1.8.8.
- models: remove the 5 `-f` hard rejects (frontend acl/redirect/use_backend
validators + wizard string/dict-redirect guards); `$(`/backtick and X!X
contradiction guards unchanged
- routers/frontend: `_pattern_file_warnings` helper; non-blocking warning on
create + update responses listing referenced pattern files (empty when no
rule uses `-f` — zero noise)
- routers/config: bulk-import preview advisory listing pattern files per
frontend (cluster config-dir aware, next to the SPOE advisories)
- React: remove the FrontendManagement submit gate and SiteWizard step gate;
ACLRuleBuilder renders informational notes instead of errors and re-adds
`-f (pattern file on host)` to the flag dropdown; create path now renders
server warnings like update
- tests: 4 reject-pins inverted to accept-pins; new test_acl_pattern_file_allow.py
(accept/guards-kept/zero-noise/advisory); full suite green (1094 passed)
taylanbakircioglu