Update sandlot-statusline to show cwd basename

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@because/sandlot",
-  "version": "0.0.30",
+  "version": "0.0.31",
   "description": "Sandboxed, branch-based development with Claude",
   "type": "module",
   "bin": {

src/vm.ts

@@ -179,7 +179,7 @@ async function configureEnvironment(home: string, apiKey: string): Promise<void>
   await Bun.file(tmp).unlink()
 
   await installScript(home, "sandlot-activity", `#!/bin/bash\nP="\${CLAUDE_PROJECT_DIR%/}"\necho "$1" > "$(dirname "$P")/.activity-$(basename "$P")"\n`)
-  await installScript(home, "sandlot-statusline", `#!/bin/bash\ninput=$(cat)\nbranch=$(echo "$input" | grep -oP '"branch"\\s*:\\s*"\\K[^"]+' | head -1)\n[ -n "$branch" ] && printf '\\033[36m\u2387 %s\\033[0m\\n' "$branch"\n`)
+  await installScript(home, "sandlot-statusline", `#!/bin/bash\ninput=$(cat)\ncwd=$(echo "$input" | grep -oP '"cwd"\\s*:\\s*"\\K[^"]+' | head -1)\n[ -n "$cwd" ] && printf '\\033[36m\u2387 %s\\033[0m\\n' "$(basename "$cwd")"\n`)
 
   await $`container exec --user ${USER} ${CONTAINER_NAME} bash -c ${`
 mkdir -p ~/.claude