fix(bin): pin dev ports in bin/up so shell BACKEND_PORT can't override .env

bin/up ran `bun --watch main.ts` without setting BACKEND_PORT, so a
shell-exported BACKEND_PORT (e.g. 24991 in ~/.bashrc, set so the Dispatch
CLI hits the prod server) overrode .env's dev value 24203 — Bun lets shell
env win over .env — binding the dev server onto the production port and
colliding with the active dispatch-server systemd service. transport-http
then failed to activate (Bun.serve "port in use"), so the HTTP server
never came up and the frontend got "Failed to fetch".

Force BACKEND_PORT=24203 + SURFACE_WS_PORT=24205 in the setsid invocation
so the dev stack is deterministic regardless of the shell environment.

1 files changed, 5 insertions, 1 deletions

diff --git a/bin/up b/bin/up
index 8d529bc..c0a7cbf 100755
--- a/bin/up
+++ b/bin/up
@@ -43,7 +43,11 @@ echo "[up] frontend → http://localhost:24204                          [vite HM
 echo "[up] Ctrl-C to stop both."
 echo
 
-setsid bash -c "cd '$BACKEND' && exec bun --watch packages/host-bin/src/main.ts" \
+# Force the dev ports: a shell-exported BACKEND_PORT (e.g. 24991 from ~/.bashrc,
+# set so the Dispatch CLI hits prod) would otherwise override .env and bind the
+# dev server onto the production port (colliding with the prod systemd service).
+# Bun lets shell env win over .env, so pin the dev ports here.
+setsid bash -c "cd '$BACKEND' && exec env BACKEND_PORT=24203 SURFACE_WS_PORT=24205 bun --watch packages/host-bin/src/main.ts" \
 	> >(sed -u 's/^/[backend]  /') 2>&1 &
 BACK_PG=$!