fix(runtime): restart daemon in background

README.md

@@ -103,10 +103,11 @@ from the build tree:
 ./strans map
 ```
 
-`run.sh` stays in the foreground and replaces itself with the daemon. Stop it
-with `Ctrl-C` or let a service supervisor own it. It neither finds nor kills
-other `strans` processes. Endpoint collisions and requested frontend startup
-failures make the process exit non-zero.
+`run.sh` stops every same-user process whose exact name is `strans`, starts one
+build-tree daemon in the background, and returns to the shell. It requires
+`pkill` from procps. Startup and frontend failures remain visible on the
+caller's standard error. A service supervisor should instead run
+`./strans map` directly in the foreground.
 
 The build does not copy or install the daemon or its data. `./strans DIR`
 opens `hira.map`, `kata.map`, `telex.map`, `kanji.dict`, `emoji.dict`, and

run.sh

@@ -11,4 +11,14 @@ if ! test -x ./strans; then
 	echo "run.sh: ./strans is not executable; run make first" >&2
 	exit 1
 fi
-exec ./strans map
+if ! command -v pkill >/dev/null 2>&1; then
+	echo "run.sh: pkill is required" >&2
+	exit 1
+fi
+
+uid=$(id -u) || exit 1
+pkill -TERM -u "$uid" -x strans 2>/dev/null || :
+sleep 0.1
+pkill -KILL -u "$uid" -x strans 2>/dev/null || :
+
+./strans map </dev/null &