- Implemented a structured web-search query parsing module supporting directives, tokenization, date parsing, and syntax serialization.
- Updated search providers to map query directives and date bounds to native provider parameters and filters.
- Added lenient result constraint post-filtering and configuration settings for enhanced engine routing.
- Added comprehensive unit and integration tests covering query parsing, constraint filtering, and provider-specific request mapping.
When FIRECRAWL_API_KEY is not set, fall back to Firecrawl keyless mode
(omit Authorization header). Auto-chain still requires a credential via
isAvailable; explicit webSearch: firecrawl works keyless via
isExplicitlyAvailable returning true.
Closes https://github.com/can1357/oh-my-pi/issues/4332
can1357