docs: reorganize design navigation

Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>

docs/.nav.yml

@@ -101,30 +101,54 @@ nav:
   - CI: contributing/ci
   - Design Documents:
     - design/index.md
-    - design/architecture_overview.md
+    - Architecture Documents:
+      - Architecture Overview: design/architecture_overview.md
     - Feature Design:
-      - design/feature/disaggregated_inference.md
-      - design/feature/ray_based_execution.md
-      - design/feature/omni_connectors/
-      - design/feature/prefix_caching.md
-      - design/feature/cfg_parallel.md
-      - design/feature/expert_parallel.md
-      - design/feature/sequence_parallel.md
-      - design/feature/tensor_parallel.md
-      - design/feature/vae_parallel.md
-      - design/feature/hsdp.md
-      - design/feature/cache_dit.md
-      - design/feature/teacache.md
-      - design/feature/skip_softmax.md
-      - design/feature/async_chunk.md
-      - design/feature/omni_async_output_materialization.md
-      - design/feature/vae_parallel.md
-      - design/feature/diffusion_continuous_batching.md
+      - Runtime and Stage Execution:
+        - Disaggregated Inference: design/feature/disaggregated_inference.md
+        - Ray-based Execution: design/feature/ray_based_execution.md
+        - Async Chunk: design/feature/async_chunk.md
+        - Async Diffusion Output: design/feature/async_diffusion_output.md
+        - Async Omni Output Materialization: design/feature/omni_async_output_materialization.md
+        - Automatic Prefix Caching: design/feature/prefix_caching.md
+      - Communication:
+        - OmniConnector Implementations:
+          - Mooncake Store Connector: design/feature/omni_connectors/mooncake_store_connector.md
+          - Mooncake Transfer Engine Connector: design/feature/omni_connectors/mooncake_transfer_engine_connector.md
+          - Mori Transfer Engine Connector: design/feature/omni_connectors/mori_transfer_engine_connector.md
+          - Shared Memory Connector: design/feature/omni_connectors/shared_memory_connector.md
+          - Yuanrong Connector: design/feature/omni_connectors/yuanrong_connector.md
+          - Yuanrong Transfer Engine Connector: design/feature/omni_connectors/yuanrong_transfer_engine_connector.md
+      - Diffusion Acceleration:
+        - Parallelism:
+          - CFG-Parallel: design/feature/cfg_parallel.md
+          - Expert Parallel: design/feature/expert_parallel.md
+          - Hybrid Sharded Data Parallel (HSDP): design/feature/hsdp.md
+          - Pipeline Parallel: design/feature/pipeline_parallel.md
+          - Sequence Parallel: design/feature/sequence_parallel.md
+          - Tensor Parallel: design/feature/tensor_parallel.md
+          - VAE Patch Parallelism: design/feature/vae_parallel.md
+        - Attention Backends:
+          - Skip-Softmax: design/feature/skip_softmax.md
+        - Quantization: user_guide/quantization/overview.md
+        - Cache-DiT: design/feature/cache_dit.md
+        - TeaCache: design/feature/teacache.md
+        - Diffusion Continuous Batching: design/feature/diffusion_continuous_batching.md
+    - Infrastructure and Performance:
+      - Prometheus Metrics: design/metrics.md
+      - Speech Generation Performance Optimizations: design/qwen3_omni_tts_performance_optimization.md
     - Module Design:
-      - design/module/ar_module.md
-      - design/module/dit_module.md
-      - design/module/entrypoint_module.md
-      - design/module/async_omni_architecture.md
+      - Runtime Modules:
+        - AR Module: design/module/ar_module.md
+        - DIT Module: design/module/dit_module.md
+      - Orchestration:
+        - Entrypoint Module: design/module/entrypoint_module.md
+        - AsyncOmni Architecture: design/module/async_omni_architecture.md
+    - RFCs and Experimental Work:
+      - AR-Diffusion Pipeline Capability: design/ar_diffusion_pipeline_capability.md
+      - Diffusion Operator Boundary (RFC): design/diffusion_ops.md
+      - Unified Error Handling (RFC): design/unified_error_handling.md
+      - Production-Grade NVIDIA Blackwell Support (RFC): design/blackwell_production_support.md
   - Docs Guide: contributing/DOCS_GUIDE.md
 - API Reference:
   - api/README.md