fix: resolve unbound variable in trap and support equals sign in #Access

.opencode/01.wireguard-policy-firewall.md

@@ -421,7 +421,7 @@ main() {
     # Temporary file for atomic write
     local tmp_policy
     tmp_policy="$(mktemp /tmp/wg-policy.XXXXXX)"
-    trap 'rm -f "$tmp_policy" 2>/dev/null; release_lock' EXIT
+    trap "rm -f \"$tmp_policy\" 2>/dev/null; release_lock" EXIT
 
     echo '{"clients":{}}' > "$tmp_policy"
 
@@ -442,7 +442,7 @@ main() {
                 ip=c[1]
             }
             if($i ~ /^#Access/) {
-                sub(/^#Access[ \t]+/, "", $i)
+                sub(/^#Access[ \t]*=?[ \t]*/, "", $i)
                 access=$i
             }
         }