chore: commit remaining working changes

Backend:
- agent: confirmation, persistence, app, langgraph_setup updates
- routes: agent_superset_explore, environments, git helpers/operations
- services: git sync refactoring
- tests: git_status_route expanded

Frontend:
- Navbar: minor cleanup
- Profile: i18n (en/ru), page enhancements, integration tests
- New: _llm_params.py

backend/src/agent/langgraph_setup.py

@@ -21,6 +21,7 @@ from langgraph.prebuilt import create_react_agent
 from psycopg.rows import dict_row
 
 from src.agent._config import FASTAPI_URL, AGENT_CONFIRM_TOOLS, AGENT_INTERRUPT_BEFORE as _INTERRUPT_BEFORE
+from src.agent._llm_params import chat_openai_kwargs
 from src.core.logger import logger
 
 # ── Monkey-patch: OpenAI SDK for Pydantic BaseModel classes ──
@@ -167,13 +168,12 @@ async def create_agent(
         extra={"src": "AgentChat.LangGraph.Setup"},
     )
 
-    llm = ChatOpenAI(
+    llm = ChatOpenAI(**chat_openai_kwargs(
         model=model,
         base_url=base_url,
         api_key=api_key,
-        temperature=0,
         max_tokens=2048,
-    )
+    ))
 
     # System prompt — env_id injected deterministically, not in user message
     prompt = (