Backed out reactivity for Binding panel per discussion. Pending some UX discussion

packages/builder/src/components/common/bindings/BindingPanel.svelte

@@ -67,10 +67,6 @@
   let targetMode = null
   let expressionResult
   let evaluating = false
-  let mounted = false
-
-  // Value updates must be reprocessed to avoid timing issues
-  $: processUpdate(value, mounted)
 
   $: useSnippets = allowSnippets && !$licensing.isFreePlan
   $: editorModeOptions = getModeOptions(allowHBS, allowJS)
@@ -98,13 +94,6 @@
     }
   }
 
-  const processUpdate = value => {
-    if (!mounted) return
-    let isJS = value?.startsWith?.("{{ js ")
-    jsValue = isJS ? value : null
-    hbsValue = isJS ? null : value
-  }
-
   const getHBSCompletions = bindingCompletions => {
     return [
       hbAutocomplete([
@@ -277,8 +266,6 @@
 
     // Set the initial side panel
     sidePanel = sidePanelOptions[0]
-
-    mounted = true
   })
 </script>