Simplify default command fallback to always run list when no args given

src/cli.ts

@@ -169,17 +169,10 @@ program
   .description("Output fish shell completions")
   .action((opts: { install?: boolean }) => completionsAction(program, opts))
 
-// ── Default: show list if sessions exist, otherwise help ─────────────
+// ── Default: `sandlot` → `sandlot list` ─────────────────────────────
 
-const args = process.argv.slice(2)
-if (args.length === 0) {
-  try {
-    const root = await git.repoRoot()
-    const st = await state.load(root)
-    if (Object.keys(st.sessions).length > 0) {
-      process.argv.push("list")
-    }
-  } catch {}
+if (process.argv.length === 2) {
+  process.argv.push("list")
 }
 
 program.parseAsync().catch((err) => {