M10: review of #1609: no automatic recognition in Read mode or beneath a dialog

CodeRabbit: Read mode leaves the Edit tool picked, so the recognition Edit
starts could run in Read mode and change a scanned document; and it could run
while a dialog or prompt was open, which PdfCraftApp::modal_open says nothing
may act beneath. It now waits for Edit to be on outside Read mode with no modal
open, and is tried again once they are gone.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/ui-egui/src/ocr_ui.rs

@@ -184,7 +184,10 @@ impl PdfCraftApp {
         // the same test the page view uses for editing content.
         let editing = (self.left_open && self.left == crate::LeftPanel::Tool("edit"))
             || matches!(self.quick_tool, crate::QuickTool::EditText | crate::QuickTool::AddText);
-        if !editing || self.ocr_run.is_some() || self.ocr_batch.is_some() {
+        // Not in Read mode (which leaves the Edit tool picked but is not editing) and not beneath a
+        // dialog or prompt: nothing may change the document under those. It is tried again once
+        // they are gone.
+        if !editing || self.mode == crate::Mode::Read || self.modal_open() || self.ocr_run.is_some() || self.ocr_batch.is_some() {
             return;
         }
         let Some((vi, id)) = self.active_ids() else { return };

crates/ui-egui/tests/ocr.rs

@@ -309,6 +309,33 @@ fn a_page_that_becomes_a_scan_while_edit_is_on_is_recognized() {
     assert_eq!(h.state().session.get(id).unwrap().can_undo(), Some("Recognize text"));
 }
 
+/// Edit changes the document only while the user is editing: not in Read mode (which leaves the Edit
+/// tool picked), and not beneath a dialog. The page is recognized once those are gone.
+#[test]
+fn edit_recognizes_a_scan_only_outside_read_mode_and_beneath_no_dialog() {
+    if !pdfcraft_engine::ocr::available() {
+        eprintln!("skipped: OCR models not installed");
+        return;
+    }
+    let mut h = edit_harness(scan());
+    let id = h.state().active_ids().unwrap().1;
+    let undo = |h: &Harness<'static, PdfCraftApp>| -> Option<String> { h.state().session.get(id).unwrap().can_undo().map(String::from) };
+    // Read mode with the Edit tool still picked.
+    assert!(h.state_mut().execute("edit.edit_text"));
+    h.state_mut().set_option("mode", "read").unwrap();
+    h.run_steps(5);
+    assert_eq!(undo(&h), None, "not in Read mode");
+    // A dialog over the window.
+    h.state_mut().set_option("mode", "edit").unwrap();
+    h.state_mut().dialog = Some(pdfcraft_ui_egui::Dialog::JsConsole);
+    h.run_steps(5);
+    assert_eq!(undo(&h), None, "not beneath a dialog");
+    // Both gone: it is read now.
+    h.state_mut().dialog = None;
+    h.run_steps(5);
+    assert_eq!(undo(&h).as_deref(), Some("Recognize text"));
+}
+
 #[test]
 fn editing_a_page_that_has_text_does_not_recognize_anything() {
     let mut h = edit_harness(text_page());