add run.sh: one-shot server launch/restart

run.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+# launch (or restart) the ani-web server
+cd "$(dirname "$0")" || exit 1
+[ -x .venv/bin/python ] || { echo "no .venv — run: uv venv .venv && uv pip install --python .venv/bin/python -r requirements.txt"; exit 1; }
+pkill -f "[u]vicorn app:app" 2>/dev/null; sleep 1
+nohup .venv/bin/python -m uvicorn app:app --host 0.0.0.0 --port 8321 > server.log 2>&1 &
+echo "ani-web on http://localhost:8321 (pid $!)"