fix: node use vision model may caused page crash (#15921)

web/app/components/workflow/nodes/llm/panel.tsx

       )
     }
 
-    if (isVisionModel && data.vision.enabled && data.vision.configs?.variable_selector) {
+    if (isVisionModel && data.vision?.enabled && data.vision?.configs?.variable_selector) {
       const currentVariable = findVariableWhenOnLLMVision(data.vision.configs.variable_selector, availableVars)
 
       forms.push(

web/app/components/workflow/nodes/parameter-extractor/panel.tsx

       },
     )
 
-    if (isVisionModel && data.vision.enabled && data.vision.configs?.variable_selector) {
+    if (isVisionModel && data.vision?.enabled && data.vision?.configs?.variable_selector) {
       const currentVariable = findVariableWhenOnLLMVision(data.vision.configs.variable_selector, availableVisionVars)
 
       forms.push(

web/app/components/workflow/nodes/question-classifier/panel.tsx

       },
     )
 
-    if (isVisionModel && data.vision.enabled && data.vision.configs?.variable_selector) {
+    if (isVisionModel && data.vision?.enabled && data.vision?.configs?.variable_selector) {
       const currentVariable = findVariableWhenOnLLMVision(data.vision.configs.variable_selector, availableVisionVars)
 
       forms.push(