fix: fixes AgentExecutor handle greyed out (#5900)

* Update styleUtils.ts

* 📝 (index.css): update color values for datatype-purple and datatype-purple-foreground to improve design consistency

---------

Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>

src/frontend/src/style/index.css

@@ -307,9 +307,9 @@
 
     --datatype-fuchsia: 291.1 93.1% 82.9%;
     --datatype-fuchsia-foreground: 293.4 69.5% 48.8%;
-
-    --datatype-purple: 269.2 97.4% 85.1%;
-    --datatype-purple-foreground: 293.4 69.5% 48.8%;
+    
+    --datatype-purple: 268.6 100% 91.8%;
+    --datatype-purple-foreground: 272.1 71.7% 47.1%;
 
     --datatype-cyan: 187 92.4% 69%;
     --datatype-cyan-foreground: 191.6 91.4% 36.5%;

src/frontend/src/utils/styleUtils.ts

@@ -432,6 +432,7 @@ export const nodeColors: { [char: string]: string } = {
   BaseLanguageModel: "#c026d3",
   LanguageModel: "#c026d3",
   Agent: "#903BBE",
+  AgentExecutor: "#903BBE",
   Tool: "#00fbfc",
 };
 
@@ -480,6 +481,7 @@ export const nodeColorsName: { [char: string]: string } = {
   BaseLanguageModel: "fuchsia",
   LanguageModel: "fuchsia",
   Agent: "purple",
+  AgentExecutor: "purple",
   Tool: "cyan",
   BaseChatMemory: "cyan",
   BaseChatMessageHistory: "orange",