storkit: merge 427_story_server_side_text_normalization_for_chat_message_line_breaks

server/src/chat/transport/matrix/bot/format.rs

@@ -14,11 +14,12 @@ pub fn format_startup_announcement(bot_name: &str) -> String {
 /// tasklists) so that common Markdown constructs render correctly in Matrix
 /// clients such as Element.
 pub fn markdown_to_html(markdown: &str) -> String {
+    let normalized = crate::chat::util::normalize_line_breaks(markdown);
     let options = Options::ENABLE_TABLES
         | Options::ENABLE_FOOTNOTES
         | Options::ENABLE_STRIKETHROUGH
         | Options::ENABLE_TASKLISTS;
-    let parser = Parser::new_ext(markdown, options);
+    let parser = Parser::new_ext(&normalized, options);
     let mut html_output = String::new();
     html::push_html(&mut html_output, parser);
     html_output
@@ -80,6 +81,20 @@ mod tests {
         );
     }
 
+    #[test]
+    fn markdown_to_html_single_newline_prose_becomes_paragraphs() {
+        // Single newlines between prose sentences should produce separate paragraphs.
+        let html = markdown_to_html("Sentence one.\nSentence two.");
+        assert!(
+            html.contains("<p>Sentence one.</p>"),
+            "expected separate paragraph for first sentence: {html}"
+        );
+        assert!(
+            html.contains("<p>Sentence two.</p>"),
+            "expected separate paragraph for second sentence: {html}"
+        );
+    }
+
     #[test]
     fn startup_announcement_uses_bot_name() {
         assert_eq!(format_startup_announcement("Timmy"), "Timmy is online.");

server/src/chat/transport/slack/format.rs

@@ -6,9 +6,13 @@
 /// This function converts common Markdown constructs so messages render
 /// nicely in Slack instead of showing raw Markdown syntax.
 pub fn markdown_to_slack(text: &str) -> String {
+    use crate::chat::util::normalize_line_breaks;
     use regex::Regex;
     use std::sync::LazyLock;
 
+    let normalized = normalize_line_breaks(text);
+    let text = normalized.as_str();
+
     // Regexes are compiled once and reused across calls.
     static RE_FENCED_BLOCK: LazyLock<Regex> =
         LazyLock::new(|| Regex::new(r"(?ms)^```.*?\n(.*?)^```").unwrap());

server/src/chat/transport/whatsapp/format.rs

@@ -55,6 +55,9 @@ pub fn chunk_for_whatsapp(text: &str) -> Vec<String> {
 /// This function converts common Markdown constructs so messages render
 /// nicely in WhatsApp instead of showing raw Markdown syntax.
 pub fn markdown_to_whatsapp(text: &str) -> String {
+    let normalized = crate::chat::util::normalize_line_breaks(text);
+    let text = normalized.as_str();
+
     // Regexes are compiled once and reused across calls.
     static RE_FENCED_BLOCK: LazyLock<Regex> =
         LazyLock::new(|| Regex::new(r"(?ms)^```.*?\n(.*?)^```").unwrap());