fix(workflow-form): a rebuild that arrives while the reader is typing is dropped instead of held (from #8437) #8497

What happened?

On the Form View, a rebuild of the input cards that arrives while the focus is inside a form control is discarded rather than postponed. Two paths reach it:

• Compilation finishes while a reader is typing in a card: the schema refresh (for example the column names an attribute dropdown offers) never lands until the next compile or a reload.
• With feat(gui): author the Form View in place with an edit mode #8455's edit mode: ticking a property in the step panel to expose it. The tick box is an <input type="checkbox"> inside the page, so it has the focus at the moment the change fires; the rebuild is dropped and the card only appears after some unrelated rebuild or a refresh. Unticking behaves the same way.

Expected: the rebuild runs as soon as it safely can. A tick box is not typing, so its rebuild should run at once; a rebuild that does arrive mid-typing should run when the focus leaves the field, not vanish.

Root cause: isTypingInTheForm() (from #8437) counts any focused INPUT inside the page as typing, tick boxes included, and both subscribers (getCompilationStateInfoChangedStream, formBindingChanged$) return when it says so. Nothing runs the emission later.

Fix: only text-like inputs, textareas, selects and content-editables count as typing; a rebuild that arrives while typing is held and runs once the focus leaves the text control (focusout, decided a tick later so tabbing to the next text field keeps it held). Found while verifying #8455 (parent #8011). #8455 carries the same change so it stays self-contained; whichever merges first, the other rebases and the duplicate hunk disappears.

How to reproduce?

On main (reader path):

1. Open a workflow in the Form View with an exposed attribute input.
2. Put the cursor in a text input and, while it is focused, cause a compile (for example a co-editor changes an upstream operator on the canvas).
3. The attribute dropdown keeps its old column list until the next compile or a reload.

With #8455 checked out (author path):

1. Open the Form View, click Edit, click a step in the preview.
2. Tick a property in the panel. No card appears until something else rebuilds the page.

Version/Branch

1.4.0-incubating-SNAPSHOT (main)

Commit Hash (Optional)

357d901 (#8437) introduced the guard; reproduced on 1fbd346.

What browsers are you seeing the problem on?

Chrome

Relevant log output

No log output: the emission is dropped client-side with no error.