Allow agent edits to be accepted/rejected before the end the turn (#29941)

Release Notes:

- N/A

crates/agent/src/agent_diff.rs

@@ -324,10 +324,6 @@ fn keep_edits_in_ranges(
     window: &mut Window,
     cx: &mut Context<Editor>,
 ) {
-    if thread.read(cx).is_generating() {
-        return;
-    }
-
     let diff_hunks_in_ranges = editor
         .diff_hunks_in_ranges(&ranges, buffer_snapshot)
         .collect::<Vec<_>>();
@@ -353,10 +349,6 @@ fn reject_edits_in_ranges(
     window: &mut Window,
     cx: &mut Context<Editor>,
 ) {
-    if thread.read(cx).is_generating() {
-        return;
-    }
-
     let diff_hunks_in_ranges = editor
         .diff_hunks_in_ranges(&ranges, buffer_snapshot)
         .collect::<Vec<_>>();
@@ -703,10 +695,6 @@ fn render_diff_hunk_controls(
 ) -> AnyElement {
     let editor = editor.clone();
 
-    if thread.read(cx).is_generating() {
-        return Empty.into_any();
-    }
-
     h_flex()
         .h(line_height)
         .mr_0p5()