[cue def] does not keep the "template" correctly

[quanghungb]

What version of CUE are you using (cue version)?

cue version v0.11.0

go version go1.23.3
      -buildmode exe
       -compiler gc
       -trimpath true
     CGO_ENABLED 0
          GOARCH amd64
            GOOS linux
         GOAMD64 v1
cue.lang.version v0.11.0

Does this issue reproduce with the latest stable release?

Yes

What did you do?

• Code source (see https://cuelang.org/play/?id=iNX2moWNafp#w=function&i=cue&f=def&o=cue)

outputs: [Name=string]: metadata: {
	name:   "\(Name)"
	labels: string
}
outputs: "test": metadata: labels: "test-label"

• Output with cue def

outputs: {
	{
		[Name=string]: metadata: {
			name:   "\(string)"
			labels: string
		}
	}
	test: metadata: labels: "test-label"
}

What did you expect?

As you can see the field name is not correct in the definition output name: "\(string)". Therefore if we are executing the output def we will get this following error

outputs.objectstorage.metadata.name: invalid interpolation: non-concrete value string (type string)