feat(backend): 添加 Groq供应商支持并优化笔记生成流程- 在 builtin_providers.json 中添加 Groq 供应商信息

- 实现 GroqTranscriber 类以支持 Groq 语音转录服务
- 新增异常处理中间件以提高系统稳定性
- 优化笔记生成流程，增加错误处理和日志记录
- 添加思维导图功能和相关组件
-重构 Markdown 查看器以支持切换视图模式

backend/app/transcriber/groq.py

@@ -0,0 +1,52 @@
+from abc import ABC
+import os
+
+from app.decorators.timeit import timeit
+from app.models.transcriber_model import TranscriptResult, TranscriptSegment
+from app.services.provider import ProviderService
+from app.transcriber.base import Transcriber
+from openai import OpenAI
+from dotenv import load_dotenv
+load_dotenv()
+
+class GroqTranscriber(Transcriber, ABC):
+
+
+    @timeit
+    def transcript(self, file_path: str) -> TranscriptResult:
+        provider = ProviderService.get_provider_by_id('groq')
+        if not provider:
+            raise Exception("Groq 供应商未配置,请配置以后使用。")
+        client = OpenAI(
+            api_key=provider.get('api_key'),
+            base_url=provider.get('base_url')
+        )
+        filename = file_path
+
+        with open(filename, "rb") as file:
+            transcription = client.audio.transcriptions.create(
+                file=(filename, file.read()),
+                model=os.getenv('GROQ_TRANSCRIBER_MODEL'),
+                response_format="verbose_json",
+            )
+            print(transcription.text)
+        print(transcription)
+        segments = []
+        full_text = ""
+
+        for seg in transcription.segments:
+            text = seg.text.strip()
+            full_text += text + " "
+            segments.append(TranscriptSegment(
+                start=seg.start,
+                end=seg.end,
+                text=text
+            ))
+
+        result = TranscriptResult(
+            language=transcription.language,
+            full_text=full_text.strip(),
+            segments=segments,
+            raw=transcription.to_dict()
+        )
+        return result