Fix not_int for Core.Const(false): use logical NOT, not bitwise

In unoptimized IR, the === comparison result type can be
Core.Const(false) instead of Bool. Check both for logical NOT.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Dale-Black

src/compiler/codegen.jl

@@ -1735,7 +1735,8 @@ function compile_intrinsic(ctx::JSCompilationContext, name::Symbol, args::Abstra
     elseif name === :not_int
         # Bool: use logical NOT; integers: use bitwise NOT
         arg_type = _get_ssa_type(ctx, args[1])
-        if arg_type === Bool
+        is_bool = arg_type === Bool || (arg_type isa Core.Const && arg_type.val isa Bool)
+        if is_bool
             return "!($(compiled_args[1]))"
         end
         return "(~$(compiled_args[1]))"