fix(mail): greeting follows the run time, not the clock (CI failed from noon on)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/api/notify.go

@@ -176,7 +176,7 @@ func (s *Server) flushNotifications(now time.Time) {
 			item := notifyItem{kind: q.Kind, title: q.Payload["title"], text: q.Payload["text"]}
 			out.add(set.Channels(q.Kind), item)
 		}
-		if err := s.deliver(uid, "Neuigkeiten", out, false); err != nil {
+		if err := s.deliver(uid, "Neuigkeiten", out, false, now); err != nil {
 			if maxAttempts+1 >= notifyMaxAttempts {
 				slog.Warn("Benachrichtigungen nach mehreren Fehlversuchen verworfen", "user_id", uid, "count", len(ids), "error", err)
 				_ = s.store.DeleteQueuedNotifications(ids)
@@ -210,7 +210,8 @@ func (c *channelItems) add(ch domain.ChannelChoice, items ...notifyItem) {
 }
 
 // deliver sends the items to the user's mail address, Discord webhook and/or own webhook.
-func (s *Server) deliver(userID, heading string, out channelItems, summary bool) error {
+// now is the time the run is for (greeting "Guten Morgen" follows the summary time, not the clock).
+func (s *Server) deliver(userID, heading string, out channelItems, summary bool, now time.Time) error {
 	emailItems, discordItems := out.email, out.discord
 	u, err := s.store.GetUserByID(userID)
 	if err != nil || u == nil || !u.IsActive {
@@ -226,9 +227,9 @@ func (s *Server) deliver(userID, heading string, out channelItems, summary bool)
 		if len(emailItems) == 1 {
 			subject = "MindSift: " + emailItems[0].text
 		}
-		c := s.digestMail(u.DisplayName, emailItems)
+		c := s.digestMail(u.DisplayName, emailItems, now)
 		if summary {
-			c = s.summaryMail(u.DisplayName, emailItems)
+			c = s.summaryMail(u.DisplayName, emailItems, now)
 		}
 		text, htmlBody := renderMail(c)
 		if err := s.sendNotifyEmail(to, subject, text, htmlBody); err != nil {
@@ -368,7 +369,7 @@ func (s *Server) sendDiscordDigest(webhookURL, heading string, items []notifyIte
 }
 
 // digestMail: what happened since the last mail (shares, completed shared tasks, watched tasks).
-func (s *Server) digestMail(name string, items []notifyItem) mailContent {
+func (s *Server) digestMail(name string, items []notifyItem, now time.Time) mailContent {
 	entries := make([]mailItem, 0, len(items))
 	for _, it := range items {
 		entries = append(entries, mailItem{Title: it.text})
@@ -379,7 +380,7 @@ func (s *Server) digestMail(name string, items []notifyItem) mailContent {
 	}
 	c := mailContent{
 		Preheader: items[0].text,
-		Greeting:  mailGreeting(time.Now(), name),
+		Greeting:  mailGreeting(now, name),
 		Intro:     intro,
 		Sections:  []mailSection{{Items: entries}},
 		Footer:    mailFooterAlarms,
@@ -391,7 +392,7 @@ func (s *Server) digestMail(name string, items []notifyItem) mailContent {
 }
 
 // summaryMail: the morning overview, grouped into overdue / today / tomorrow.
-func (s *Server) summaryMail(name string, items []notifyItem) mailContent {
+func (s *Server) summaryMail(name string, items []notifyItem, now time.Time) mailContent {
 	groups := []struct{ key, title, tone string }{
 		{"overdue", "Überfällig", "danger"},
 		{"today", "Heute", ""},
@@ -437,7 +438,7 @@ func (s *Server) summaryMail(name string, items []notifyItem) mailContent {
 	}
 	c := mailContent{
 		Preheader: "Deine Aufgaben: " + strings.Join(parts, ", "),
-		Greeting:  mailGreeting(time.Now(), name),
+		Greeting:  mailGreeting(now, name),
 		Intro:     "Hier ist dein Überblick für heute – " + strings.Join(parts, ", ") + ".",
 		Sections:  sections,
 		Outro:     outro,
@@ -471,7 +472,7 @@ func (s *Server) sendDailySummaries(now time.Time) {
 		}
 		var out channelItems
 		out.add(domain.ChannelChoice{Email: ds.Email, Discord: ds.Discord, Webhook: ds.Webhook, Push: ds.Push}, items...)
-		if err := s.deliver(uid, "Deine Aufgaben für heute", out, true); err != nil {
+		if err := s.deliver(uid, "Deine Aufgaben für heute", out, true, now); err != nil {
 			slog.Warn("Tageszusammenfassung konnte nicht verschickt werden", "user_id", uid, "error", err)
 		}
 	}