PR #120 rewrote auth.controller.spec.ts and environment.service.spec.ts in a
leaner style but dropped several edge cases that PR #116 covered. Port the
gaps so the server coverage matches the original review intent:
- auth.controller: returnToken=false must behave like the omitted case
(no token in the response body, cookie still set) — guards an
`!== undefined`-style regression.
- environment.getCorsAllowedOrigins: empty string -> [], single origin,
and leading/trailing/duplicate commas with spaces -> trimmed list.
- environment.isSwaggerEnabled: mixed-case "True" -> true; "false"/""/"1"
-> false.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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