fix: update setup script to install PaddlePaddle GPU version from official source

Changes to setup_dev_env.sh:
- Add support for CUDA 13.x (install CUDA 12.x compatible version)
- Use official PaddlePaddle source for GPU versions
- Install paddlepaddle-gpu==3.0.0b2 from official index
- CUDA 13.x: use cu123 package (backward compatible)
- CUDA 12.x: use cu123 package
- CUDA 11.7+: use cu118 package
- CUDA 11.2-11.6: use cu117 package

Changes to requirements.txt:
- Comment out paddlepaddle dependency
- Let setup script handle GPU/CPU version installation

This fixes the issue where pip installed CPU-only paddlepaddle 3.2.1
instead of GPU version, causing GPU acceleration to be unavailable.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements.txt

@@ -10,7 +10,7 @@ email-validator>=2.0.0  # For pydantic EmailStr validation
 
 # ===== OCR Engine =====
 paddleocr>=3.0.0
-paddlepaddle>=3.0.0
+# paddlepaddle>=3.0.0  # Installed separately in setup script (GPU/CPU version)
 paddlex[ocr]>=3.0.0  # Required for PP-StructureV3 layout analysis
 
 # ===== Image Processing =====

setup_dev_env.sh

@@ -106,6 +106,9 @@ echo -e "${YELLOW}[6/9] 偵測 GPU 和 CUDA 支援...${NC}"
 
 # GPU 偵測函數
 detect_gpu() {
+    # 初始化變量
+    PADDLE_INDEX=""
+
     # 檢查是否有 NVIDIA GPU
     if command -v nvidia-smi &> /dev/null; then
         echo -e "${GREEN}✓ 偵測到 NVIDIA GPU${NC}"
@@ -120,19 +123,29 @@ detect_gpu() {
             CUDA_MAJOR=$(echo $CUDA_VERSION | cut -d. -f1)
             CUDA_MINOR=$(echo $CUDA_VERSION | cut -d. -f2)
 
-            if [ "$CUDA_MAJOR" -ge 12 ]; then
+            if [ "$CUDA_MAJOR" -ge 13 ]; then
+                echo -e "${YELLOW}⚠ CUDA 13.x 偵測到${NC}"
+                echo "PaddlePaddle 目前最高支援 CUDA 12.x"
+                echo "將嘗試安裝 CUDA 12.x 編譯的 GPU 版本（可能兼容）"
+                USE_GPU=true
+                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"  # 使用支援 CUDA 12.x 的版本
+                PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu123/"
+            elif [ "$CUDA_MAJOR" -eq 12 ]; then
                 echo "將安裝 PaddlePaddle GPU 版本 (CUDA 12.x)"
                 USE_GPU=true
-                PADDLE_PACKAGE="paddlepaddle-gpu"
+                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
+                PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu123/"
             elif [ "$CUDA_MAJOR" -eq 11 ]; then
                 if [ "$CUDA_MINOR" -ge 7 ]; then
                     echo "將安裝 PaddlePaddle GPU 版本 (CUDA 11.7+)"
                     USE_GPU=true
-                    PADDLE_PACKAGE="paddlepaddle-gpu"
+                    PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
+                    PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu118/"
                 elif [ "$CUDA_MINOR" -ge 2 ]; then
                     echo "將安裝 PaddlePaddle GPU 版本 (CUDA 11.2-11.6)"
                     USE_GPU=true
-                    PADDLE_PACKAGE="paddlepaddle-gpu"
+                    PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
+                    PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu117/"
                 else
                     echo -e "${YELLOW}⚠ CUDA 版本過舊 ($CUDA_VERSION)，建議升級到 11.2+${NC}"
                     echo "將安裝 CPU 版本"
@@ -172,10 +185,16 @@ echo ""
 echo -e "${YELLOW}安裝 PaddlePaddle...${NC}"
 if [ "$USE_GPU" = true ]; then
     echo "安裝 GPU 加速版本..."
-    pip install $PADDLE_PACKAGE -i https://pypi.tuna.tsinghua.edu.cn/simple
+    if [ -n "$PADDLE_INDEX" ]; then
+        echo "使用官方源: $PADDLE_INDEX"
+        pip install "$PADDLE_PACKAGE" -i "$PADDLE_INDEX"
+    else
+        echo "使用 PyPI..."
+        pip install "$PADDLE_PACKAGE"
+    fi
 else
     echo "安裝 CPU 版本..."
-    pip install $PADDLE_PACKAGE -i https://pypi.tuna.tsinghua.edu.cn/simple
+    pip install paddlepaddle
 fi
 
 # 安裝其他依賴（跳過 requirements.txt 中的 paddlepaddle）