test: comprehensive test coverage and type fixes

- Add 100+ new test files covering provider sources, platform adapters,
  agent runners, star/plugin system, knowledge base, core utils,
  pipeline, computer tools, builtin commands, and dashboard routes
- Fix Python type errors in sqlite.py (col() wrappers for SQLModel),
  astr_agent_tool_exec, core_lifecycle, star context/manager
- Fix TypeScript strict mode errors across 30+ dashboard Vue files
- Add import smoke tests, auth roundtrip, startup tests
- Add compile-all check and CLI entry test for AUR compatibility
- Restore BotMessageAccumulator and helpers lost in merge

tests/test_deerflow_api_client.py

@@ -38,11 +38,9 @@ async def test_delete_thread_raises_api_error_with_thread_context():
         _FakeDeleteResponse(status=500, body="thread cleanup failed"),
     )
 
-    try:
-        with pytest.raises(DeerFlowAPIError) as exc_info:
-            await client.delete_thread("thread-123")
-    finally:
-        client._closed = True
+    with pytest.raises(DeerFlowAPIError) as exc_info:
+        await client.delete_thread("thread-123")
+    client._closed = True
 
     assert exc_info.value.status == 500
     assert exc_info.value.thread_id == "thread-123"