Some checks failed
CI Code / Check spelling (pull_request) Successful in 21s
CI Code / Check coding style (pull_request) Successful in 37s
CI Code / Linux (debian) (pull_request) Failing after 2m56s
CI Code / Linux (ubuntu) (pull_request) Failing after 3m7s
CI Code / Code Coverage (pull_request) Successful in 2m55s
CI Code / Linux (arch) (pull_request) Failing after 3m45s
Update ai_providers_find() to handle NULL search_str safely by treating it as an empty string, preventing a segfault in strdup() within autocomplete_complete(). Rename test_ai_providers_find_case_sensitive to test_ai_providers_find_case_insensitive to reflect the new case-insensitive matching contract. Update all affected tests to expect cycling behavior (NULL/empty returns first provider) and use auto_gchar for automatic memory management. Use `gchar` instead of `char` in ai_providers_find for consistency