refactor(send): inline hidden_template_count into its two call sites

A one-line saturating_sub wrapper exported for one production line (the prompt text) and two assertions — the expression is shorter than its name at every use.

crates/xmedia-bot/src/send/mod.rs

@@ -907,12 +907,21 @@ mod tests {
         // Names are folded, not one per row.
         assert_eq!(keyboard.inline_keyboard[0].len(), 3);
         assert_eq!(keyboard.inline_keyboard.last().unwrap().len(), 2);
-        assert_eq!(super::post_send::hidden_template_count(&templates), 140);
+        assert_eq!(
+            templates
+                .len()
+                .saturating_sub(super::post_send::MAX_TEMPLATE_BUTTONS),
+            140
+        );
         // Under the cap nothing is hidden and every name gets a button.
         let few: HashMap<String, String> = (0..4)
             .map(|i| (format!("t{i}"), "[]".to_string()))
             .collect();
-        assert_eq!(super::post_send::hidden_template_count(&few), 0);
+        assert_eq!(
+            few.len()
+                .saturating_sub(super::post_send::MAX_TEMPLATE_BUTTONS),
+            0
+        );
         assert_eq!(
             build_edit_markup(&few)
                 .inline_keyboard

crates/xmedia-bot/src/send/post_send.rs

@@ -212,11 +212,6 @@ pub(super) fn build_edit_markup(templates: &HashMap<String, String>) -> InlineKe
     InlineKeyboardMarkup::new(rows)
 }
 
-/// How many templates the markup could not fit, for the prompt text.
-pub(super) fn hidden_template_count(templates: &HashMap<String, String>) -> usize {
-    templates.len().saturating_sub(MAX_TEMPLATE_BUTTONS)
-}
-
 /// Notifies a chat about a dead-lettered task (skips when `notify_chat_id` is
 /// absent).
 pub(crate) async fn notify_failure(
@@ -282,7 +277,7 @@ pub(crate) async fn post_send_actions(ctx: &AppContext<'_>, task: &Task, message
         let templates = ctx.chat_store.get(chat_id).await.template;
         let keyboard = build_edit_markup(&templates);
         let mut text = edit_prompt_text(ctx.config.edit_message_ttl);
-        let hidden = hidden_template_count(&templates);
+        let hidden = templates.len().saturating_sub(MAX_TEMPLATE_BUTTONS);
         if hidden > 0 {
             // The keyboard is capped; say so instead of silently hiding them.
             text.push_str(&format!(