A card with no button is read, never picked

The opener that says what the business does and the look-around card
lead nowhere: they are what the page says before its options, so a
task and a simulation step carry them as `page` context and offer
only the cards that lead somewhere. Five personas per round had been
"choosing" the opener and counted as misroutes.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/needs.rs

@@ -571,7 +571,8 @@ pub fn sim_model(
                 json!({
                     "page": step.page,
                     "question": page.name,
-                    "options": page.alternatives.iter().filter(|a| !a.disabled).map(|a| json!({
+                    "context": page_context(page),
+                    "options": page.alternatives.iter().filter(|a| !a.disabled && leads_somewhere(a)).map(|a| json!({
                         "name": a.name,
                         "description": plain(&a.description),
                     })).collect::<Vec<_>>(),
@@ -646,6 +647,41 @@ fn plain(text: &str) -> String {
     text.split_whitespace().collect::<Vec<_>>().join(" ")
 }
 
+/// A card a visitor can act on: it leads to a page, records an
+/// answer, or moves a record. A card with none of those is read, not
+/// picked - the opener that says what the business does, the look
+/// around - and is context on the page, never an option.
+pub fn leads_somewhere(a: &Alternative) -> bool {
+    a.action.is_some() || a.record_as.is_some() || a.self_transition.is_some()
+}
+
+/// What the page says before its options: every card that leads
+/// nowhere, its heading, description and features, as one line each.
+pub fn page_context(page: &Question) -> String {
+    page.alternatives
+        .iter()
+        .filter(|a| !a.disabled && !leads_somewhere(a))
+        .map(|a| {
+            let mut line = a.name.clone();
+            let description = plain(&a.description);
+            if !description.is_empty() {
+                line.push_str(&format!(": {description}"));
+            }
+            for f in &a.features {
+                let text = plain(&f.description);
+                match (f.name.trim().is_empty(), text.is_empty()) {
+                    (true, true) => {}
+                    (true, false) => line.push_str(&format!(" {text}")),
+                    (false, true) => line.push_str(&format!(" {}.", f.name.trim())),
+                    (false, false) => line.push_str(&format!(" {}: {text}", f.name.trim())),
+                }
+            }
+            line
+        })
+        .collect::<Vec<_>>()
+        .join("\n")
+}
+
 /// Every (persona, page-on-their-path) pair with a real choice on it.
 /// `skim` shows the engine only each alternative's heading - what a
 /// visitor who never reads the description has to go on.
@@ -660,10 +696,11 @@ pub fn tasks(file: &NeedsFile, questions: &Questions, skim: bool) -> Vec<Task> {
         };
         for (i, step) in path.iter().enumerate() {
             let page = &questions[&step.page];
-            let open: Vec<&Alternative> = page.alternatives.iter().filter(|a| !a.disabled).collect();
+            let open: Vec<&Alternative> = page.alternatives.iter().filter(|a| !a.disabled && leads_somewhere(a)).collect();
             if open.len() < 2 {
                 continue;
             }
+            let context = page_context(page);
             let mut trail: Vec<String> = path[..=i].iter().map(|s| s.page.clone()).collect();
             let expect: Vec<String> = viable(questions, need, page, need.max_steps - i, i == 0, false, &mut trail)
                 .into_iter()
@@ -684,7 +721,11 @@ pub fn tasks(file: &NeedsFile, questions: &Questions, skim: bool) -> Vec<Task> {
                 persona: persona.id.clone(),
                 need: need.id.clone(),
                 page: step.page.clone(),
-                state: BTreeMap::from([("body", plain(&persona.text))]),
+                state: if context.is_empty() {
+                    BTreeMap::from([("body", plain(&persona.text))])
+                } else {
+                    BTreeMap::from([("body", plain(&persona.text)), ("page", context)])
+                },
                 questions: BTreeMap::from([(
                     "pick",
                     ChoiceQuestion {