refactor(tools): Avoid warnings. (#10161)

api/core/tools/provider/builtin/chart/chart.py

 import matplotlib.pyplot as plt
-from matplotlib.font_manager import FontProperties
+from matplotlib.font_manager import FontProperties, fontManager
 
 from core.tools.provider.builtin_tool_provider import BuiltinToolProviderController
 
     ]
 
     for font in font_list:
-        chinese_font = FontProperties(font)
-        if chinese_font.get_name() == font:
-            return chinese_font
+        if font in fontManager.ttflist:
+            chinese_font = FontProperties(font)
+            if chinese_font.get_name() == font:
+                return chinese_font
 
     return FontProperties()
 

api/core/tools/provider/builtin/podcast_generator/tools/podcast_audio_generator.py

 import io
 import random
 from typing import Any, Literal, Optional, Union
+from warnings import catch_warnings
 
 import openai
-from pydub import AudioSegment
 
 from core.tools.entities.tool_entities import ToolInvokeMessage
 from core.tools.errors import ToolParameterValidationError, ToolProviderCredentialValidationError
 from core.tools.tool.builtin_tool import BuiltinTool
 
+with catch_warnings(action="ignore", category=RuntimeWarning):
+    from pydub import AudioSegment
+
 
 class PodcastAudioGeneratorTool(BuiltinTool):
     @staticmethod