fix: keep notification header title and event line on separate rows

Rich Markdown collapses single newlines, so repo and Release/PR/push summary
rendered on one visual line. Use a blank line between header rows.

Author: amtiYo

CHANGELOG.md

@@ -8,7 +8,12 @@ GitHub Releases.
 
 ## Unreleased
 
-Use this section for changes that are merged but not released yet.
+### Fixed
+
+- **Notification headers keep a line break under the repo name.** Rich Markdown
+  collapses a single `\n`, so the event line (`Release · …`, commit summary,
+  PR action) sat on the same visual row as `📦 repo`. Headers now use a blank
+  line between the title row and the event row.
 
 ## v1.1.0-alpha.1 - 2026-07-16
 

internal/notify/format.go

@@ -77,7 +77,7 @@ func GitHubEvent(event Event) string {
 }
 
 func TestMessage(repoFullName string) string {
-	return "<b>" + esc(repoFullName) + "</b>\nTest notification. Branchy can deliver notifications to this chat."
+	return "<b>" + esc(repoFullName) + "</b>\n\nTest notification. Branchy can deliver notifications to this chat."
 }
 
 func eventTitle(eventType string) string {
@@ -111,7 +111,8 @@ func commitEvent(event Event) string {
 	if event.Branch != "" {
 		summary += fmt.Sprintf(" · <code>%s</code>", esc(event.Branch))
 	}
-	header := fmt.Sprintf("%s <b>%s</b>\n%s", iconCommits, esc(event.RepoFullName), summary)
+	// Double newline: Rich Markdown collapses single \n into one visual line.
+	header := fmt.Sprintf("%s <b>%s</b>\n\n%s", iconCommits, esc(event.RepoFullName), summary)
 
 	var list []string
 	used := 0
@@ -142,7 +143,7 @@ func commitEvent(event Event) string {
 
 func pullRequestEvent(event Event) string {
 	action := humanizePRAction(event)
-	header := fmt.Sprintf("%s <b>%s</b>\nPull request %s", iconPR, esc(event.RepoFullName), esc(action))
+	header := fmt.Sprintf("%s <b>%s</b>\n\nPull request %s", iconPR, esc(event.RepoFullName), esc(action))
 
 	var meta []string
 	if title := truncateText(event.Title, maxTitleRunes); title != "" {
@@ -220,7 +221,7 @@ func releaseEvent(event Event) string {
 			versionLine += " · " + esc(version)
 		}
 	}
-	header := fmt.Sprintf("%s <b>%s</b>\n%s", iconRelease, esc(event.RepoFullName), versionLine)
+	header := fmt.Sprintf("%s <b>%s</b>\n\n%s", iconRelease, esc(event.RepoFullName), versionLine)
 
 	var meta string
 	if event.Actor != "" {

internal/notify/format_test.go

@@ -51,7 +51,7 @@ func TestGitHubEventFormatsSingleCommit(t *testing.T) {
 		CommitCount: 1,
 	})
 	for _, want := range []string{
-		iconCommits + " <b>FreshLabDev/branchy</b>",
+		iconCommits + " <b>FreshLabDev/branchy</b>\n\n1 new commit · <code>main</code>",
 		"1 new commit · <code>main</code>",
 		"Pushed by <b>amtiYo</b>",
 		`<a href="https://github.com/FreshLabDev/branchy/compare/a...b">Compare changes</a>`,
@@ -211,7 +211,7 @@ func TestGitHubEventFormatsPullRequest(t *testing.T) {
 		Body:         "This PR **improves** things.\n\nSee `notify` for details.",
 	})
 	for _, want := range []string{
-		iconPR + " <b>FreshLabDev/branchy</b>",
+		iconPR + " <b>FreshLabDev/branchy</b>\n\nPull request opened",
 		"Pull request opened",
 		"into <code>main</code> · by <b>amtiYo</b>",
 		`<a href="https://github.com/FreshLabDev/branchy/pull/7">#7 Fix &lt;format&gt; &amp; &#34;escape&#34;</a>`,
@@ -267,7 +267,7 @@ func TestGitHubEventFormatsRelease(t *testing.T) {
 			"<ins>Underlined bit</ins>",
 	})
 	for _, want := range []string{
-		iconRelease + " <b>FreshLabDev/branchy</b>",
+		iconRelease + " <b>FreshLabDev/branchy</b>\n\n<b>Pre-release</b>",
 		`<b>Pre-release</b> · <a href="https://github.com/FreshLabDev/branchy/releases/tag/v0.1.0-alpha.1">v0.1.0-alpha.1 &lt;format&gt; &amp; &#34;escape&#34;</a>`,
 		"> ## Added",
 		"> - **Commit notifications** with [compare links](https://github.com/FreshLabDev/branchy/compare/a...b)",