9e67a7417f
Flip [source] from git=jackpot51/seatd to path="source" so the already-tracked in-tree source/ (52 files, incl. libseat/seatd-launch) is the authoritative implementation — a first-class local Red Bear package like evdevd and redbear-compositor, per Local Fork Supremacy and the operator decision (INPUT-STACK-LINUX-ALIGNMENT-PLAN.md §4b). We own it and integrate upstream into our tree rather than fetch+patch. Does not affect redbear-mini/bare (they do not pull seatd). Making it compile for Redox + wiring the compositor seat path remain part of the Mesa-gated desktop bring-up.