packages/application/recipe/use_cases.py

@@ -12,13 +12,10 @@ from packages.application.recipe.commands import (
     UpdateRecipeCommand,
 )
 from packages.domain.recipe import Recipe, RecipeItem
+from packages.domain.exceptions import NotFoundError
 from packages.infrastructure.feature_flags import FeatureScope, feature_flags
 
 
-class NotFoundError(Exception):
-    pass
-
-
 class FeatureDisabledError(Exception):
     pass
 

packages/application/template/use_cases.py

@@ -15,19 +15,11 @@ from packages.application.template.commands import (
     ValidateTemplateCommand,
 )
 from packages.domain.editing_mode import EditingMode
+from packages.domain.exceptions import NotFoundError, ValidationError
 from packages.domain.template import Template, TemplateCategory, TemplateSegment
 from packages.ports.template_repository import TemplateRepositoryPort
 
 
-class NotFoundError(Exception):
-    pass
-
-
-class ValidationError(Exception):
-    """业务规则校验失败."""
-
-    pass
-
 
 VALID_MODES = {m.value for m in EditingMode}
 VALID_MATERIAL_TYPES = {"人物", "场景"}

packages/application/title_library/use_cases.py

@@ -12,6 +12,7 @@ from packages.application.title_library.commands import (
     PickTitleCommand,
     UpdateTitleLibraryCommand,
 )
+from packages.domain.exceptions import NotFoundError, QuotaExceededError
 from packages.domain.quota import QuotaDimension, quota_checker
 from packages.domain.title_library import TitleLibraryItem
 
@@ -162,15 +163,3 @@ class PickTitleUseCase:
 
         # 随机选一个
         return random.choice(pool)
-
-
-class QuotaExceededError(Exception):
-    def __init__(self, dimension: str, limit: float, used: float) -> None:
-        self.dimension = dimension
-        self.limit = limit
-        self.used = used
-        super().__init__(f"Quota exceeded for {dimension}: {used}/{limit}")
-
-
-class NotFoundError(Exception):
-    pass

packages/application/tts_job/exceptions.py

@@ -0,0 +1,7 @@
+"""TTS Job 模块公共异常定义。"""
+
+
+class TTSJobNotFoundError(Exception):
+    """TTS 任务未找到。"""
+
+    pass

packages/application/tts_job/use_cases.py

@@ -5,14 +5,10 @@ from __future__ import annotations
 from typing import List, Optional
 
 from packages.domain.tts_job import TTSJob
+from packages.application.tts_job.exceptions import TTSJobNotFoundError
 from packages.ports.tts_job_repository import TTSJobRepository
 
 
-class TTSJobNotFoundError(Exception):
-    """TTS 任务未找到。"""
-
-    pass
-
 
 class CreateTTSJobUseCase:
     """创建 TTS 合成任务。"""

packages/application/tts_job/workflow.py

@@ -19,6 +19,7 @@ from typing import Optional
 
 from packages.application.cosyvoice_service import CosyVoiceAuthError, CosyVoiceError, CosyVoiceService
 from packages.application.tts_job.audio_merger import AudioMerger
+from packages.application.tts_job.exceptions import TTSJobNotFoundError
 from packages.application.tts_job.text_splitter import split_text
 from packages.domain.tts_job import TTSJob, TTSJobStatus
 from packages.ports.tts_job_repository import TTSJobRepository
@@ -43,12 +44,6 @@ class TTSWorkflowError(Exception):
     pass
 
 
-class TTSJobNotFoundError(Exception):
-    """TTS 任务未找到。"""
-
-    pass
-
-
 class TTSWorkflowService:
     """TTS 合成工作流编排服务。
 

packages/application/video_share/use_cases.py

@@ -13,15 +13,10 @@ from packages.application.video_share.commands import (
 from packages.domain.generated_video import GeneratedVideo
 from packages.domain.video_share import VideoShare
 from packages.ports.generated_video_repository import GeneratedVideoRepository
+from packages.domain.exceptions import NotFoundError
 from packages.ports.video_share_repository import VideoShareRepositoryPort
 
 
-class NotFoundError(Exception):
-    """分享记录不存在."""
-
-    pass
-
-
 class VideoNotFoundError(Exception):
     """视频不存在."""
 

packages/application/voice_library/use_cases.py

@@ -10,6 +10,7 @@ from packages.application.voice_library.commands import (
     CreateVoiceLibraryCommand,
     UpdateVoiceLibraryCommand,
 )
+from packages.domain.exceptions import NotFoundError, QuotaExceededError
 from packages.domain.quota import QuotaDimension, quota_checker
 from packages.domain.voice_library import VoiceLibraryItem
 
@@ -117,15 +118,3 @@ class DeleteVoiceLibraryUseCase:
 
     def execute(self, voice_id: str, user_id: str) -> bool:
         return self.repository.delete(voice_id, user_id)
-
-
-class QuotaExceededError(Exception):
-    def __init__(self, dimension: str, limit: float, used: float) -> None:
-        self.dimension = dimension
-        self.limit = limit
-        self.used = used
-        super().__init__(f"Quota exceeded for {dimension}: {used}/{limit}")
-
-
-class NotFoundError(Exception):
-    pass

packages/domain/exceptions.py

@@ -0,0 +1,35 @@
+"""
+领域层通用异常定义。
+
+所有应用层共享的通用异常在此统一定义，
+消除各 use_cases 模块中重复的异常类。
+领域特定的异常仍在各模块内定义。
+"""
+
+
+class DomainError(Exception):
+    """领域层异常基类。"""
+
+    pass
+
+
+class NotFoundError(DomainError):
+    """资源不存在。"""
+
+    pass
+
+
+class ValidationError(DomainError):
+    """业务规则校验失败。"""
+
+    pass
+
+
+class QuotaExceededError(DomainError):
+    """配额超限。"""
+
+    def __init__(self, dimension: str, limit: float, used: float) -> None:
+        self.dimension = dimension
+        self.limit = limit
+        self.used = used
+        super().__init__(f"Quota exceeded for {dimension}: {used}/{limit}")