Meow Apps - AI Engine v2.9.0

* Add: Persisted templates in Content Generator, Images Generator, and Playground.
* Update: Improved clarity in tables and selects.
* Fix: Limited PHP session starts to AI Engine's REST endpoints and added session status checks.
* Fix: Improved error handling for dynamic function additions via mwai_ai_query filter and ensured proper JSON encoding for mwai_ai_feedback objects in Chat Completions API.
* Fix: Enhanced CSV/JSON import error handling with detailed validation, specific error messages, and helpful examples in a modal dialog.
* Fix: Corrected guest user display in Discussions and Insights tables.

* Fix: Pinecone vector listing now correctly handles variable index dimensions by generating matching zero vectors instead of using a hardcoded size.
* Fix: Pinecone index name extraction has been improved to accurately process hyphenated index names, and a dimension mismatch indicator has been added next to the AI Environment title in embedding settings.
* Add: simpleTranscribeAudio method now provides a consistent API for audio transcription using the default AI audio settings.
* Fix: functions_list now exclusively retrieves snippets of the "function" type from Code Engine to improve accuracy.