fix local_chat and update balance-serve and SUMMARY doc

doc/README.md

@@ -22,6 +22,7 @@ Our vision for KTransformers is to serve as a flexible platform for experimentin
 
 <h2 id="Updates">🔥 Updates</h2>
 
+* **Apr 2, 2025**: Support Multi-concurrency. ([Tutorial](./en/balance-serve.md)).
 * **Mar 27, 2025**: Support Multi-concurrency.
 * **Mar 15, 2025**: Support ROCm on AMD GPU ([Tutorial](./en/ROCm.md)).
 * **Mar 5, 2025**: Support unsloth 1.58/2.51 bits weights and [IQ1_S/FP8 hybrid](./en/fp8_kernel.md) weights. Support 139K [Longer Context](./en/DeepseekR1_V3_tutorial.md#v022-longer-context) for DeepSeek-V3 and R1 in 24GB VRAM.

doc/SUMMARY.md

@@ -11,6 +11,7 @@
 - [Multi-GPU Tutorial](en/multi-gpu-tutorial.md)
 - [Use FP8 GPU Kernel](en/fp8_kernel.md)
 - [Use AMD GPU](en/ROCm.md)
+- [Use Multi-concurrency](en/balance-serve.md)
 # Server
   - [Server](en/api/server/server.md)
   - [Website](en/api/server/website.md)

doc/en/balance-serve.md

@@ -74,6 +74,9 @@ strings ~/anaconda3/envs/ktransformers/lib/libstdc++.so.6 | grep GLIBCXX
 
 ```bash
 sudo apt install libtbb-dev libssl-dev libcurl4-openssl-dev libaio1 libaio-dev libfmt-dev libgflags-dev zlib1g-dev patchelf
+pip3 install packaging ninja cpufeature numpy openai
+pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu126
+
 ```
 
 ### 3. Build ktransformers
@@ -87,7 +90,7 @@ git submodule update --init --recursive
 
 # Install single NUMA dependencies
 USE_BALANCE_SERVE=1  bash ./install.sh
-# Or Install Dual NUMA dependencies
+# For those who have two cpu and 1T RAM（Dual NUMA）:
 USE_BALANCE_SERVE=1 USE_NUMA=1 bash ./install.sh
 ```