[moz] fix: M1 label type/feature→type/feat 对齐仓库实际 label（姜维 Review）

- impl.yml: type/feature → type/feat
- toolchain_routes.py: business_type feature→feat（匹配 Gitea label）
- toolchain-templates.yaml: feature→feat

.gitea/ISSUE_TEMPLATE/impl.yml

@@ -2,7 +2,7 @@ name: 实现任务
 about: 按设计文档实现功能
 title: "[moz] impl: "
 labels:
-  - type/feature
+  - type/feat
 body:
   - type: textarea
     id: description

config/toolchain-templates.yaml

@@ -6,7 +6,7 @@
 # issue_assigned（按 Issue label 分 6 路 + infrastructure）
 # ---------------------------------------------------------------------------
 issue_assigned:
-  feature:
+  feat:
     steps:
       - "理解需求（Issue body）→ 如有不明确在 Issue comment 追问"
       - "git checkout main && git pull origin main"

src/api/toolchain_routes.py

@@ -1026,13 +1026,15 @@ async def _handle_issues(payload: Dict[str, Any]) -> None:
             )
         else:
             # §21 §5 按 type/* label 解析 business_type
-            business_type = "feature"  # default
+            business_type = "feat"  # default
             for lbl in labels_list:
                 lbl_lower = lbl.lower()
                 if "bug" in lbl_lower:
                     business_type = "bug"
-                elif "impl" in lbl_lower or "feature" in lbl_lower:
-                    business_type = "feature" if "feature" in lbl_lower else "impl"
+                elif "impl" in lbl_lower:
+                    business_type = "impl"
+                elif "feat" in lbl_lower:
+                    business_type = "feat"
                 elif "docs" in lbl_lower or "documentation" in lbl_lower:
                     business_type = "docs"
                 elif "refactor" in lbl_lower: