ui does not correctly display in dynamically allocated ports "0:[port]"

Steps to Reproduce

1. Update tilt-example-html with

k8s_resource('example-html', port_forwards=["0:8000"])

1. Run tilt up
2. Visit the Tilt ui

Expected Behavior

the UI should link to the service we're port-fowarding to

Current Behavior

the UI links to localhost:0

Additional Info

The weirdest part of this bug is that the API server actually knows the correct port

$ tilt get pf -o yaml
apiVersion: v1
items:
- apiVersion: tilt.dev/v1alpha1
  kind: PortForward
  metadata:
    annotations:
      tilt.dev/log-span-id: kubernetesapply:example-html
      tilt.dev/resource: example-html
    creationTimestamp: "2023-10-10T21:53:23Z"
    name: example-html-example-html-bc598cb58-pxq7t
    ownerReferences:
    - apiVersion: tilt.dev/v1alpha1
      blockOwnerDeletion: true
      controller: true
      kind: KubernetesDiscovery
      name: example-html
      uid: 28f91202-4a98-4dd6-bf11-5e48f87c9fa4
    resourceVersion: "92"
    uid: 7b36ea85-6ab4-4cf6-a640-ab5ec31f86e7
  spec:
    cluster: default
    forwards:
    - containerPort: 8000
      host: localhost
    namespace: default
    podName: example-html-bc598cb58-pxq7t
  status:
    forwardStatuses:
    - addresses:
      - 127.0.0.1
      - ::1
      containerPort: 8000
      localPort: 46753
      startedAt: "2023-10-10T21:53:36.204691Z"
kind: List
metadata:
  resourceVersion: ""

Reproduce the issue with port_forwards=["0:8000"], then inspect how the Tilt UI renders port-forward links and compare that with the localPort reported by tilt get pf -o yaml. Done means the UI links to the dynamically allocated local port, such as 46753, instead of localhost:0.