增加复制粘贴交互

contracts/http/route-surface.v1.json

@@ -22,6 +22,7 @@
     { "method": "GET", "path": "/api/assets" },
     { "method": "POST", "path": "/api/assets" },
     { "method": "POST", "path": "/api/assets/upload" },
+    { "method": "POST", "path": "/api/assets/import-image" },
     { "method": "DELETE", "path": "/api/assets/{id}" },
     { "method": "GET", "path": "/api/assets/{id}/download" },
     { "method": "GET", "path": "/api/auth/callback" },