Confirmed on the live system
On the live system, CRLF line endings were confirmed in the autologin configuration and appended CR to its values. Separately, the fallback greeter emitted python3\r; its exact originating file has not been established. Neither observation proves a corrected ISO. A durable fix and a newly built ISO have not been delivered or proven; both still require clean-boot validation.
Blockers
Xorg stops while opening vt1 with a “permission denied” error. The Safe Graphics and GPU paths have not been validated. The proprietary NVIDIA driver is outside this test scope.
Next validations
A durable fix and a newly built ISO have not been delivered or proven; both still require clean-boot validation.
Status
Desktop verdict: NO-GO. A durable fix and a newly built ISO have not been delivered or proven; both still require clean-boot validation.