Fix _aser_component: evaluate kwargs with _aser not async_eval

_aser_component expands component bodies in SX wire format mode,
but was evaluating kwarg values with async_eval (HTML mode). This
caused SxExpr kwargs to be fully rendered to HTML strings, which
then broke when serialized back to SX — producing bare symbols
like 'div' that the client couldn't resolve.

Fix: use _aser() for kwarg evaluation to keep values in SX format.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/static/scripts/sx.js

@@ -418,9 +418,6 @@
       if (name === "true") return true;
       if (name === "false") return false;
       if (name === "nil") return NIL;
-      // Debug: log env keys to help diagnose
-      var envKeys = Object.keys(env).filter(function(k) { return typeof env[k] !== "function"; }).slice(0, 20);
-      console.error("Undefined symbol: " + name + " | env keys (non-fn): " + envKeys.join(", "));
       throw new Error("Undefined symbol: " + name);
     }