Add PKCE support for Tetrate Agent Router Service (#4165)

Signed-off-by: John Landa <jonathanlanda@gmail.com>
Co-authored-by: Michael Neale <michael.neale@gmail.com>

ui/desktop/src/utils/tetrateSetup.ts

@@ -0,0 +1,25 @@
+export interface TetrateSetupStatus {
+  isRunning: boolean;
+  error: string | null;
+}
+
+export async function startTetrateSetup(): Promise<{ success: boolean; message: string }> {
+  const baseUrl = `${window.appConfig.get('GOOSE_API_HOST')}:${window.appConfig.get('GOOSE_PORT')}`;
+  const response = await fetch(`${baseUrl}/handle_tetrate`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+  });
+
+  if (!response.ok) {
+    console.error('Failed to start Tetrate setup:', response.statusText);
+    return {
+      success: false,
+      message: `Failed to start Tetrate setup ['${response.status}]`,
+    };
+  }
+
+  const result = await response.json();
+  return result;
+}