fix(google): Fix 400 Bad Request error with Gemini 3 thought signatures (#6035)

Signed-off-by: rabi <ramishra@redhat.com>

ui/desktop/openapi.json

@@ -5561,9 +5561,8 @@
           "id": {
             "type": "string"
           },
-          "thoughtSignature": {
-            "type": "string",
-            "nullable": true
+          "metadata": {
+            "type": "object"
           },
           "toolCall": {
             "type": "object"
@@ -5580,6 +5579,9 @@
           "id": {
             "type": "string"
           },
+          "metadata": {
+            "type": "object"
+          },
           "toolResult": {
             "type": "object"
           }

ui/desktop/src/api/types.gen.ts

@@ -969,7 +969,9 @@ export type ToolPermission = {
 
 export type ToolRequest = {
     id: string;
-    thoughtSignature?: string | null;
+    metadata?: {
+        [key: string]: unknown;
+    };
     toolCall: {
         [key: string]: unknown;
     };
@@ -977,6 +979,9 @@ export type ToolRequest = {
 
 export type ToolResponse = {
     id: string;
+    metadata?: {
+        [key: string]: unknown;
+    };
     toolResult: {
         [key: string]: unknown;
     };