- app/services/diagnose/_llm_client.py: strip <think>…</think> blocks
(case-insensitive, multiline) from LLM response content before it
reaches the UI or any JSON parser — affects DeepSeek-R1, Qwen QwQ,
and any other model that emits chain-of-thought in content
- app/rest.py: suggest_sources now also returns untracked_names — query
tokens that look like hostnames/service names but don't appear in any
monitored source, so the UI can prompt the user to add them
- web/src/components/ChatDiagnose.vue: show amber "Not monitoring: X"
banner with "Add as a log source →" link when untracked_names present
- tests/test_llm_client.py: 13 tests covering think-strip edge cases
(single/multi-line, multiple blocks, case-insensitive, only-thinking)
plus existing extract_content and JSON-fence helpers
