fix: accept vLLM thinking in reasoning or reasoning_content

Newer vLLM parsers put CoT in reasoning; older builds and DeepSeek still use reasoning_content. Canonicalize to the UI field and echo only the original wire field so other ChatOpenAI models stay unchanged. Point qwen3.6 at VllmChatModel.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -88,18 +88,20 @@ skills/
 hermes-agent-main/
 .gitignore
 offline-backend-20260512/backend/tests/*
-# Keep the openGauss URL/dialect/schema compatibility regression coverage versioned.
-!offline-backend-20260512/backend/tests/test_gauss_database.py
+# Keep the openGauss URL/dialect/schema compatibility regression coverage versioned.
+!offline-backend-20260512/backend/tests/test_gauss_database.py
 !offline-backend-20260512/backend/tests/test_llmwiki_weknora.py
-!offline-backend-20260512/backend/tests/test_llmwiki_knowledge_management.py
+!offline-backend-20260512/backend/tests/test_llmwiki_knowledge_management.py
 !offline-backend-20260512/backend/tests/test_health_auth_bypass.py
 # Keep formal Word OOXML and embedded-font regression coverage versioned.
 !offline-backend-20260512/backend/tests/test_word_export.py
-# Keep generated-file library aggregation and filtering regression coverage versioned.
-!offline-backend-20260512/backend/tests/test_artifact_library.py
+# Keep generated-file library aggregation and filtering regression coverage versioned.
+!offline-backend-20260512/backend/tests/test_artifact_library.py
 # Keep the model configuration regression coverage versioned even though
 # this deployment repository otherwise ignores newly added backend tests.
 !offline-backend-20260512/backend/tests/test_model_management.py
+# Keep vLLM reasoning/reasoning_content field compatibility regressions versioned.
+!offline-backend-20260512/backend/tests/test_reasoning_fields.py
 # Keep the forced-research agent runtime gate and sandbox-policy regressions versioned.
 !offline-backend-20260512/backend/tests/test_forced_research_agent.py
 # Keep fixed-question exact-match and streaming regression coverage versioned.
@@ -176,10 +178,10 @@ docs/backups
 # Frontend skills components must be tracked (excluded from the broad skills/ ignore above)
 !frontend-web/src/components/workspace/skills/
 
-# uv lockfile (not tracked per project preference)
-offline-backend-20260512/backend/uv.lock
-
-!offline-backend-20260512/backend/tests/test_wiki_package_roundtrip.py
+# uv lockfile (not tracked per project preference)
+offline-backend-20260512/backend/uv.lock
+
+!offline-backend-20260512/backend/tests/test_wiki_package_roundtrip.py
 
 # Local-only scratch directory (not committed)
 0622/