fix: missing URLs for extract() with array schema (#1107)

# why
- before this change, when we convert `z.string().url()` to an ID, if it
was inside a `z.array()`, it was not getting converted back into a URL
- this meant that if you defined a schema like this:
```ts
schema: z.object({
  records: z.array(z.string().url()),
})
```
you would receive an array like this:
```
{
  records: [
    '0-302', '0-309',
    '0-316', '0-323',
    '0-330', '0-337',
    '0-344', '0-351',
    '0-358', '0-365'
  ]
}
```
- with this change, you will now receive the actual URLs, ie:
```
{
  records: [
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10003-10041.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10004-10143%20(C06932208).pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10004-10143.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10004-10156.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10004-10213.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10005-10321.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10006-10247.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10007-10345.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10009-10021.pdf',
    'https://www.archives.gov/files/research/jfk/releases/2025/0318/104-10009-10222.pdf'
  ]
}
```

# what changed
- updated the `injectUrls` function so that when it hits an array and
there is not deeper path, it loops through the array and injects the
URLs
# test plan
- evals

Author: seanmcguire12

.changeset/twelve-suits-peel.md

@@ -0,0 +1,5 @@
+---
+"@browserbasehq/stagehand": patch
+---
+
+fix: url extraction not working inside an array

lib/utils.ts

@@ -382,11 +382,29 @@ export function injectUrls(
   idToUrlMapping: Record<string, string>,
 ): void {
   if (path.length === 0) return;
+  const toId = (value: unknown): string | undefined => {
+    if (typeof value === "number") {
+      return String(value);
+    }
+    if (typeof value === "string" && ID_PATTERN.test(value)) {
+      return value;
+    }
+    return undefined;
+  };
   const [key, ...rest] = path;
 
   if (key === "*") {
     if (Array.isArray(obj)) {
-      for (const item of obj) injectUrls(item, rest, idToUrlMapping);
+      if (rest.length === 0) {
+        for (let i = 0; i < obj.length; i += 1) {
+          const id = toId(obj[i]);
+          if (id !== undefined) {
+            obj[i] = idToUrlMapping[id] ?? "";
+          }
+        }
+      } else {
+        for (const item of obj) injectUrls(item, rest, idToUrlMapping);
+      }
     }
     return;
   }
@@ -395,14 +413,7 @@ export function injectUrls(
     const record = obj as Record<string | number, unknown>;
     if (path.length === 1) {
       const fieldValue = record[key];
-
-      const id =
-        typeof fieldValue === "number"
-          ? String(fieldValue)
-          : typeof fieldValue === "string" && ID_PATTERN.test(fieldValue)
-            ? fieldValue
-            : undefined;
-
+      const id = toId(fieldValue);
       if (id !== undefined) {
         record[key] = idToUrlMapping[id] ?? "";
       }