Initial PQC Design & Algorithm Selection

Design a high-level architecture for your PQC-secured client-server communication channel. Select a pair of NIST-recommended PQC algorithms for Key Encapsulation Mechanism (KEM) and Digital Signatures (e.g., Kyber and Dilithium). Justify your choice based on security level, performance considerations, and existing library support. Outline how `DeepSeek-R1` could assist in understanding these algorithms or generating initial code structures. Provide a diagram and a brief written explanation.