新增多证书模板管理流程

backend/app/api/routes/admin_certificate_templates.py

@@ -0,0 +1,25 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.responses import FileResponse
+
+from app.api.deps import require_roles
+from app.models import AdminUser
+from app.schemas.certificate_template import CertificateTemplateOut
+from app.services.certificate_templates import get_certificate_template, list_certificate_templates
+
+router = APIRouter()
+
+
+@router.get("", response_model=list[CertificateTemplateOut])
+def list_templates(
+    _: AdminUser = Depends(require_roles("system_admin", "certificate_admin", "readonly")),
+) -> list[dict[str, object]]:
+    return [template.to_dict() for template in list_certificate_templates()]
+
+
+@router.get("/{template_code}/preview")
+def preview_template(template_code: str) -> FileResponse:
+    try:
+        template = get_certificate_template(template_code)
+    except (ValueError, FileNotFoundError) as exc:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
+    return FileResponse(template.asset_path, media_type="image/png")