A sample of an ideal gas undergoes a cyclic thermodynamic process \(A \rightarrow B \rightarrow C \rightarrow A\), as shown in the \(P\text{--}V\) diagram. Process \(A \rightarrow B\) is an isobaric expansion, process \(B \rightarrow C\) is an isochoric pressure drop, and process \(C \rightarrow A\) is a linear compression returning the gas to its initial state. What is the net thermal energy \(Q\) added to the gas during one complete cycle?