[CLI] Foundry local 0.10.2, Web UI does not work

### Describe the issue

Im using the described Foundry local 0.10.2 cli. After starting the server and seeing the web uri, the uri is "reachable", but it returns a 404 (from kestrel)

Maybe that should be that way, but then it feels bad. At least a simple "everything runs" message would have been feeling better here.

### To reproduce

- install the 0.10.2 CLI for foundry
- run the server (foundry server start)
- open the visible url
- receive a 404

### Urgency

_No response_

### Platform and architecture

Windows X64

### OS Version

Windows 11 24H2

### Installation type

Released package/binary

### Foundry Local version

0.10.2

### API or surface area

CLI

### Hardware acceleration/backend

WebGPU/CUDA

### Backend/runtime version

_No response_

Start with the `foundry server start` CLI entry point and the URL it prints, then trace how requests to the root path are handled. Reproduce the behavior with Foundry Local 0.10.2 on Windows and verify that opening the displayed URL provides a useful response instead of an unexplained 404.

Written by the indexing model from the issue text.