fix: use correct Chinese font path on Linux Docker container

app/services/pdf_generator.py

@@ -12,13 +12,42 @@ from reportlab.pdfbase import pdfmetrics
 from reportlab.pdfbase.ttfonts import TTFont
 from reportlab.lib.enums import TA_CENTER, TA_LEFT
 
-# 注册中文字体（包含常规和粗体）
-FONT_PATH = r"C:\Windows\Fonts\msyh.ttc"
-FONT_BOLD_PATH = r"C:\Windows\Fonts\msyhbd.ttc"
+# 注册中文字体
+# Windows 和 Linux 使用不同路径
+if os.name == 'nt':  # Windows
+    FONT_PATH = r"C:\Windows\Fonts\msyh.ttc"
+    FONT_BOLD_PATH = r"C:\Windows\Fonts\msyhbd.ttc"
+else:  # Linux (Docker)
+    # 直接尝试常见的中文字体路径
+    possible_paths = [
+        "/usr/share/fonts/truetype/wqy/wqy-microhei.ttc",
+        "/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc",
+        "/usr/share/fonts/truetype/noto/NotoSansCJK-Regular.ttc",
+        "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
+    ]
+    FONT_PATH = None
+    for p in possible_paths:
+        if os.path.exists(p):
+            FONT_PATH = p
+            break
+    if not FONT_PATH:
+        FONT_PATH = possible_paths[0]  # 使用第一个作为默认值（会触发异常）
+    FONT_BOLD_PATH = FONT_PATH  # 使用同一字体（不支持粗体分离）
 
 try:
     pdfmetrics.registerFont(TTFont("Chinese", FONT_PATH))
+    # 注册粗体（如果路径不同才注册，相同则复用）
+    if FONT_BOLD_PATH != FONT_PATH:
+        try:
             pdfmetrics.registerFont(TTFont("Chinese-Bold", FONT_BOLD_PATH))
+        except:
+            pdfmetrics.registerFont(TTFont("Chinese-Bold", FONT_PATH))
+    else:
+        # 同一字体，注册为 Chinese-Bold 别名
+        try:
+            pdfmetrics.registerFont(TTFont("Chinese-Bold", FONT_PATH))
+        except:
+            pass
     CHINESE_FONT_OK = True
 except Exception as e:
     CHINESE_FONT_OK = False