feat: completed input box ui + ux (#12927)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Introduced a document picker UI for embedding and selecting AFFiNE
documents, with improved search and recent document functionality.
- Added support for searching and fetching recently updated documents
within a workspace.
- Enhanced error handling for login and metadata validation during
document operations.
  - Added ability to attach documents directly from the input box.

- **Improvements**
- Refined UI animations and layout behaviors for attachment and document
picker components.
- Updated attachment and header views for clearer pluralization and
display logic.
- Improved selection indicators and search experience in the document
picker.
- Enhanced delegate handling for user actions across input and
attachment components.

- **Bug Fixes**
- Fixed progress indicators and error alerts for failed document
operations.

- **Chores**
- Updated project configuration for improved build and signing
processes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

packages/frontend/apps/ios/App/App/AffineViewController+AIButton.swift

@@ -13,10 +13,21 @@ extension AFFiNEViewController: IntelligentsButtonDelegate {
     IntelligentContext.shared.webView = webView!
     button.beginProgress()
     
-    IntelligentContext.shared.preparePresent() { _ in
+    IntelligentContext.shared.preparePresent() { result in
       button.stopProgress()
-      let controller = IntelligentsController()
-      self.present(controller, animated: true)
+      switch result {
+      case .success(let success):
+        let controller = IntelligentsController()
+        self.present(controller, animated: true)
+      case .failure(let failure):
+        let alert = UIAlertController(
+          title: "Error",
+          message: failure.localizedDescription,
+          preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .default))
+        self.present(alert, animated: true)
+      }
     }
   }
 }