feat: add --yes support to teardown scripts

teardown_all.sh

@@ -70,12 +70,6 @@ if [[ "$AUTO_YES" == "false" ]]; then
   fi
 fi
 
-# ---------------------------------------------------------------------------
-# Export YES=true so individual teardown scripts skip their own prompts
-# when --yes is passed. Each teardown script checks for interactive input,
-# but when called from here with --yes, we pipe 'y' to them instead.
-# ---------------------------------------------------------------------------
-
 # Teardown scripts in reverse order (9 → 1)
 # Each entry: phase_num|script_path
 TEARDOWNS=(
@@ -105,12 +99,8 @@ for entry in "${TEARDOWNS[@]}"; do
   log_info ">>> Tearing down Phase ${phase_num}..."
 
   if [[ "$AUTO_YES" == "true" ]]; then
-    # Feed unlimited 'y' responses via process substitution.
-    # A pipeline (yes | script) would break under pipefail: when the script
-    # finishes and closes stdin, `yes` gets SIGPIPE (exit 141), making the
-    # pipeline report failure even though the teardown succeeded.
-    # Process substitution avoids this — only the script's exit code matters.
-    if "${SCRIPT_DIR}/${script}" < <(yes); then
+    # Pass --yes through to each teardown script so prompts are skipped.
+    if "${SCRIPT_DIR}/${script}" --yes; then
       PASS=$((PASS + 1))
     else
       log_warn "Phase ${phase_num} teardown had issues (continuing)"