Convert all LLM-facing prompts, templates, and tool output labels to
language-neutral English so the model responds in the user's input
language. Update frontend relevance/match-type mappings to match.
Output language strategy:
- User-facing: reply in user's input language
- Vector-indexed: match source document language
- LLM-internal: fixed English
- Added automatic filtering for `deleted_at IS NULL` in database queries to ensure only active records are returned.
- Updated the `database_query.go` documentation to reflect the new soft-delete feature and its implications for query construction.
- Enhanced the SQL validation process to include soft-delete conditions, improving data integrity and security.
These changes enhance the robustness of database interactions by enforcing soft-delete logic across relevant queries.
- Replaced `vlm_model_id` with a structured `vlm_config` object in knowledge base configurations, including `enabled` flag and `model_id`.
- Updated API documentation to reflect changes in VLM configuration structure.
- Enhanced frontend interfaces to accommodate new VLM configuration format.
- Improved localization for new features related to knowledge graph and multimodal capabilities.
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