feat: add forms domain and durable window binding (v0.9.0) (#14)

- Add forms domain with a universal field setter that auto-detects element
  type and fires framework-compatible input events (React native-setter trick)
- Add window-binding helper to capture and bind the real Chrome windowId as the
  session's durable window identity on every new-window code path
- Wire supporting changes across CDP session/ownership, client, navigate,
  isolated-tab, prompt, and state
- Add manual tests for forms and window binding
- Bump version 0.8.3 -> 0.9.0

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/src/domains/isolated-tab.ts b/src/domains/isolated-tab.ts
index c759cec..73ed158 100644
--- a/src/domains/isolated-tab.ts
+++ b/src/domains/isolated-tab.ts
@@ -13,6 +13,7 @@
 import type { BrowserClient } from "../client";
 import { type Result, err, ok } from "../util/result";
 import { safeJs } from "../util/js-template";
+import { bindHarnessWindowId } from "../cdp/window-binding";
 import type { ToolErr } from "../util/tool";
 
 /** A tab attached by its own sessionId, ready to drive via callOnTarget. */
@@ -40,7 +41,10 @@ export const openIsolatedTab = async (client: BrowserClient): Promise<Result<Iso
   if (!created.success) return err(toToolErr(created.error.message));
   const { targetId } = created.data as { targetId: string };
 
-  if (createParams["newWindow"]) client.ownership().setHarnessWindow(targetId);
+  if (createParams["newWindow"]) {
+    client.ownership().setHarnessWindow(targetId);
+    await bindHarnessWindowId(client, targetId);
+  }
   client.ownership().add(targetId);
 
   const attached = await client.session().callBrowser("Target.attachToTarget", { targetId, flatten: true });