server.go starts listenAndServe in an anonymous function (closes #162)

The server's OnStart hook started the HTTP listener with
`go s.listenAndServe()`; the Go style guide asks for a function called
with `go` to be wrapped in an anonymous function, so it is now
`go func() { s.listenAndServe() }()`. No other go statement in the Go
code called a function directly. Nothing the server does changed.

Model: opus-5-5

TODO.md

@@ -23,6 +23,11 @@ Run `make frontend-viewport-test` in CI as its own step; it is not part of
 
 # Completed Steps
 
+- 2026-10-19: the server's `OnStart` hook in `internal/server/server.go` starts
+  `listenAndServe` with `go func() { s.listenAndServe() }()`, as the Go style
+  guide asks ([#162](https://git.eeqj.de/sneak/netwatch/issues/162)); it was
+  `go s.listenAndServe()`. No other `go` statement in the Go code called a
+  function directly. Nothing the server does changed
 - 2026-10-19: `.gitignore`, `.editorconfig` and `.golangci.yml` are the
   sneak/prompts copies at `0653579`
   ([#174](https://git.eeqj.de/sneak/netwatch/issues/174)). `.gitignore` is the

internal/server/server.go

@@ -79,7 +79,7 @@ func New(
 			s.SetupRoutes()
 			s.httpServer = s.newHTTPServer()
 
-			go s.listenAndServe()
+			go func() { s.listenAndServe() }()
 
 			return nil
 		},