fix(phase-285): restore weak_basic_llvm + complete LLVM detection/quick SSOT

src/cli/args.rs

@@ -30,7 +30,7 @@ pub fn parse() -> CliConfig {
 
 pub fn build_command() -> Command {
     Command::new("nyash")
-        .version("1.0")
+        .version(if cfg!(feature = "llvm") { "1.0 features:llvm" } else { "1.0" })
         .author("Claude Code <claude@anthropic.com>")
         .about("🦀 Nyash Programming Language - Everything is Box in Rust! 🦀")
         .arg(Arg::new("dev").long("dev").help("Enable development defaults (AST using ON; Operator Boxes observe; safe diagnostics)").action(clap::ArgAction::SetTrue))

src/runtime/host_handles.rs

@@ -73,3 +73,8 @@ pub fn get(h: u64) -> Option<Arc<dyn NyashBox>> {
 pub fn snapshot() -> Vec<Arc<dyn NyashBox>> {
     reg().snapshot()
 }
+
+/// Drop a handle from the registry, decrementing its reference count
+pub fn drop_handle(h: u64) {
+    reg().drop_handle(h)
+}