Keep transition decisions visible and add native lifecycle oracle

crates/oa-desktop/src/workflow.rs

@@ -1407,16 +1407,6 @@ impl Workflow {
                             .color(style::MUTED),
                     );
                 }
-                content = content.push(
-                    text(format!(
-                        "{} changes · {} required boundary choices · {} unresolved conflicts · {} modeling warnings",
-                        d.plan.changes.len(),
-                        d.plan.conflicts.iter().filter(|c| d.boundary_choice(p, c)).count(),
-                        d.plan.conflicts.iter().filter(|c| !d.boundary_choice(p, c)).count(),
-                        d.plan.warnings.len()
-                    ))
-                    .size(12),
-                );
             }
         }
         let enabled = match self {
@@ -1433,12 +1423,50 @@ impl Workflow {
                     .color(iced::Color::from_rgb8(178, 54, 58)),
             );
         }
-        column![
-            scrollable(content.padding(iced::Padding {
-                right: 14.,
-                ..Default::default()
-            }))
-            .height(480),
+        let mut footer = column![].spacing(8);
+        if let Self::Transition(d) = self {
+            let boundary_choices = d
+                .plan
+                .conflicts
+                .iter()
+                .filter(|c| d.boundary_choice(p, c))
+                .count();
+            footer = footer.push(
+                text(format!(
+                    "{} reviewed items · {} boundary choices · {} conflicts · {} warnings",
+                    d.plan.changes.len(),
+                    boundary_choices,
+                    d.plan.conflicts.len() - boundary_choices,
+                    d.plan.warnings.len()
+                ))
+                .size(12),
+            );
+            let guidance = if d.destination_error(p).is_some() {
+                Some("Choose a compatible diagram in Show result in, above the mappings.".into())
+            } else if boundary_choices > 0 {
+                Some("Choose the counterpart kind in each mapping that needs a system boundary decision.".into())
+            } else if let Some(field) = d.plan.conflicts.iter().find_map(|c| c.field) {
+                let field = match field {
+                    TransitionField::Name => "Name",
+                    TransitionField::Description => "Description",
+                };
+                Some(format!(
+                    "Review {field} below the mappings: choose Keep target, Take source, or merged text."
+                ))
+            } else if !d.plan.conflicts.is_empty() {
+                Some("Review the conflict messages below the mappings and complete the required decisions.".into())
+            } else {
+                None
+            };
+            if let Some(guidance) = guidance {
+                footer = footer.push(
+                    text(guidance)
+                        .size(12)
+                        .color(iced::Color::from_rgb8(178, 54, 58)),
+                );
+            }
+        }
+        footer = footer.push(
             row![
                 Space::new().width(Fill),
                 button(text("Cancel").size(12))
@@ -1458,7 +1486,15 @@ impl Workflow {
                 .padding(10)
                 .on_press_maybe(enabled.then_some(Message::Workflow(Event::Apply)))
             ]
-            .spacing(10)
+            .spacing(10),
+        );
+        column![
+            scrollable(content.padding(iced::Padding {
+                right: 14.,
+                ..Default::default()
+            }))
+            .height(480),
+            footer
         ]
         .spacing(18)
         .into()