fix: 清理22个F841 unused-variable，解除CI Validate-Style阻塞

全部为 except Exception as e: 中变量e未使用的模式，
ruff自动修复将 e: 改为 :。不涉及任何业务逻辑变更。

apps/api/app/api/routes/asset_diagnosis.py

@@ -336,7 +336,7 @@ def get_project_asset_diagnosis(
             assets.extend(asset_repository.list_by_library(library.id))
     except HTTPException:
         raise
-    except Exception as e:
+    except Exception:
         logger.exception("素材诊断查询失败: project_id=%s", project_id)
         # 返回空诊断结果，避免 500
         return _build_diagnosis(project_id, [])

apps/api/app/api/routes/chunked_upload.py

@@ -177,7 +177,7 @@ def _cleanup_expired_uploads() -> int:
                 meta_file.unlink()
                 cleaned += 1
                 logger.info(f"Cleaned up expired upload: {upload_id}")
-        except Exception as e:
+        except Exception:
             logger.exception("Failed to cleanup upload metadata: %s", meta_file)
 
     return cleaned

apps/api/app/api/routes/generation_variant_plans.py

@@ -107,7 +107,7 @@ def create_variant_plans(
             )
             if _latest:
                 source_plan_id = _latest.id
-        except Exception as e:
+        except Exception:
             logger.exception("[variant-plans] 源 plan 解析失败")
 
     if not source_plan_id:
@@ -121,7 +121,7 @@ def create_variant_plans(
         from app.api.routes.generation_tasks import _query_voice_durations
 
         voice_durations = _query_voice_durations(db, voices)
-    except Exception as e:
+    except Exception:
         logger.exception("[variant-plans] 配音时长查询失败（按占位段长选片）")
         voice_durations = [0.0] * request.count
 

apps/api/app/api/routes/templates_editor/ai_features.py

@@ -65,7 +65,7 @@ def _build_asset_analyses(
                 if url:
                     video_urls.append(url)
                     valid_asset_ids.append(aid)
-            except Exception as e:
+            except Exception:
                 logger.exception("获取素材URL失败: asset_id=%s", aid)
 
         if not video_urls:
@@ -176,7 +176,7 @@ def editor_ai_recommend(
         )
         try:
             db.rollback()
-        except Exception as e:
+        except Exception:
             logger.exception("db rollback failed in ai_recommend")
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,

apps/api/app/api/routes/templates_editor/clips.py

@@ -140,7 +140,7 @@ def _build_asset_url_map(
     try:
         assets = asset_repo.find_by_ids(unique_ids)
         asset_map = {a.id: a for a in assets}
-    except Exception as e:
+    except Exception:
         logger.exception("批量查询素材失败: asset_ids=%s", asset_ids)
         return {aid: None for aid in asset_ids if aid}
 
@@ -155,7 +155,7 @@ def _build_asset_url_map(
                 result[aid] = None
                 continue
             result[aid] = storage.get_download_url(storage_key, expires_seconds=3600)
-        except Exception as e:
+        except Exception:
             logger.exception("生成素材签名URL失败: asset_id=%s", aid)
             result[aid] = None
 
@@ -486,7 +486,7 @@ def _get_mediakit_recommendations(
                 if url:
                     video_urls.append(url)
                     valid_asset_ids.append(asset_id)
-            except Exception as e:
+            except Exception:
                 logger.exception("获取素材URL失败: asset_id=%s", asset_id)
 
         if not video_urls:
@@ -987,7 +987,7 @@ def _update_mediakit_recommendations_async(  # pragma: no cover
             if storage_key and mime.startswith("video/"):
                 try:
                     video_url = storage.get_download_url(storage_key)
-                except Exception as e:
+                except Exception:
                     logger.exception("后台任务: 获取素材URL失败: asset_id=%s", asset_id)
 
             # 构建该素材的占用区间列表（排除已更新片段）
@@ -1039,7 +1039,7 @@ def _update_mediakit_recommendations_async(  # pragma: no cover
                             asset_id,
                             len(scene_changes),
                         )
-                    except Exception as cache_err:
+                    except Exception:
                         # 缓存写入失败不影响本次片段更新
                         logger.exception(
                             "后台任务: 场景点缓存写入失败: asset_id=%s",
@@ -1123,7 +1123,7 @@ def _update_mediakit_recommendations_async(  # pragma: no cover
                                 recommended_start + clip_duration,
                                 plan_id,
                             )
-                    except Exception as me:
+                    except Exception:
                         logger.exception(
                             "后台任务: 同步素材区间记录失败，回滚本次片段更新: clip_id=%s",
                             clip.id,
@@ -1142,27 +1142,27 @@ def _update_mediakit_recommendations_async(  # pragma: no cover
                         asset_id,
                         recommended_start,
                     )
-                except Exception as ue:
+                except Exception:
                     logger.exception("后台任务: 单个片段更新失败: clip_id=%s", clip.id)
                     try:
                         db.rollback()
-                    except Exception as e:
+                    except Exception:
                         pass
                     continue
 
         logger.info("后台任务完成: plan_id=%s 成功更新 %d 个片段", plan_id, updated_count)
 
-    except Exception as e:
+    except Exception:
         # 后台任务失败不影响已创建的片段，静默处理
         logger.exception("后台任务异常: plan_id=%s", plan_id)
         if db:
             try:
                 db.rollback()
-            except Exception as e:
+            except Exception:
                 pass
     finally:
         if db:
             try:
                 db.close()
-            except Exception as e:
+            except Exception:
                 pass

apps/api/app/api/routes/voice_clones.py

@@ -167,7 +167,7 @@ def create_voice_clone(
             # P2-3: Celery 调度失败时标记 profile 为 failed，避免永久卡在 processing
             try:
                 workflow.process_clone_failure(profile.id, f"Celery 任务调度失败: {e}")
-            except Exception as inner_e:
+            except Exception:
                 logger.exception("Failed to mark profile as failed after dispatch error")
 
     return _to_response(profile)
@@ -281,7 +281,7 @@ def retry_voice_clone(
             # P2-3: Celery 调度失败时标记 profile 为 failed，避免永久卡在 processing
             try:
                 workflow.process_clone_failure(profile.id, f"Celery 任务调度失败: {e}")
-            except Exception as inner_e:
+            except Exception:
                 logger.exception("Failed to mark profile as failed after dispatch error")
 
     return _to_response(profile)

apps/api/app/api/routes/voices.py

@@ -105,7 +105,7 @@ def _resolve_preset_preview_url(
         _preset_preview_cache[voice_id] = (audio_url, time.time())
         logger.info("Preset voice preview generated: %s", voice_id)
         return audio_url
-    except Exception as e:
+    except Exception:
         logger.exception("Failed to generate preset voice preview: voice_id=%s", voice_id)
         return fallback_url
 
@@ -126,7 +126,7 @@ def _resolve_all_preset_preview_urls(
     for p in presets:
         try:
             result_map[p.voice_id] = _resolve_preset_preview_url(p.voice_id, p.preview_url, cosyvoice)
-        except Exception as e:
+        except Exception:
             logger.exception("Failed to resolve preset preview URL: voice_id=%s", p.voice_id)
             result_map[p.voice_id] = p.preview_url
     return result_map
@@ -732,7 +732,7 @@ def _find_or_create_voice_library_for_extract(*, user_id, project_repository, as
         if session is not None:
             try:
                 session.rollback()
-            except Exception as e:
+            except Exception:
                 logger.exception("session rollback failed in _find_or_create_voice_library")
         for lib in asset_library_repository.find_by_project(project.id):
             kind = lib.kind.value if hasattr(lib.kind, "value") else lib.kind