docs: 添加 Git LFS 克隆说明

Readme.md

@@ -1,3 +1,27 @@
+# 0. Repository Clone Instructions (Git LFS)
+
+The robotic hand STL model files (`.STL`) in this repository are hosted via Git LFS (Large File Storage). A plain `git clone` will only fetch pointer placeholder files, and the MuJoCo simulation will fail because it cannot find the STL models.
+
+**Install Git LFS before cloning:**
+```bash
+sudo apt install git-lfs
+git lfs install
+```
+
+**Then clone the repository:**
+```bash
+git clone https://gitea.robotquan.com/chenshijue/delay-measurement.git
+```
+
+After cloning, the STL files will be automatically downloaded as full content via LFS.
+
+**Verify LFS files were fetched (optional):**
+```bash
+git lfs ls-files        # should list all *.STL files
+```
+
+---
+
 # 1. LinkerFFG Glove
 
 ## 1.1 Product Introduction