- New app/services/embeddings.py: TURNSTONE_EMBED_* env vars, multi-backend support
- embedder.py delegates to service layer; re-exports EMBEDDING_AVAILABLE for compat
- retriever.py updated to use service layer
- Test coverage updated in tests/context/test_embedder.py
- wizard.py: wrap syslog_port int() in try/except to default 514 on non-numeric input
- ContextView: add try/catch to doDelete, doDeleteFact, addFact for network errors
- ContextView: arrow-key navigation for tablist (ArrowLeft/ArrowRight)
- DiagnoseView: arrow-key navigation for tablist (ArrowLeft/ArrowRight)
- WizardOverlay: reset current_step to last schema step when clicking 'Go back and edit'
- WizardOverlay: focus trap on Tab/Shift+Tab within dialog element
- Implement document type detection for yaml/json/markdown/text
- Extract service facts from docker-compose YAML (names, images, ports)
- Split text into overlapping word chunks (300-word default with 50-word overlap)
- Enforce 5 MB file size limit
- Comprehensive TDD test suite: 15 tests passing
