Merge pull request #16800 from overleaf/jpa-fix-double-loaded

[web] fix detection of writefull extension

GitOrigin-RevId: 2bfad36ec14edf4d95acfcdfd8094f3769871d44

services/web/types/window.ts

@@ -49,7 +49,9 @@ declare global {
     brandVariation?: Record<string, any>
     data?: Record<string, any>
     expectingLinkedFileRefreshedSocketFor?: string | null
-    writefull?: any
+    writefull?: {
+      type: 'extension' | 'integration'
+    }
     io?: any
     overleaf: {
       unstable: {