feat(mail): one layout for all mails with logo, greeting, cards and footer

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

internal/api/alarms.go

@@ -8,12 +8,63 @@ import (
 	"time"
 
 	"github.com/sandrodach/mindsift/internal/domain"
+	"github.com/sandrodach/mindsift/internal/storage"
 )
 
 // --- MULTI-CHANNEL ALARM DISPATCHER (EMAIL, DISCORD, CUSTOM WEBHOOK) ---
 
-func (s *Server) sendEmailNotification(toEmail, subject, bodyText string) error {
-	return s.sendEmailHTML(toEmail, subject, bodyText, "")
+// sendMailContent sends a mail in the common MindSift look (mailtemplate.go), as text and HTML.
+func (s *Server) sendMailContent(toEmail, subject string, c mailContent) error {
+	text, htmlBody := renderMail(c)
+	return s.sendEmailHTML(toEmail, subject, text, htmlBody)
+}
+
+// Footers: why a mail came
+const (
+	mailFooterAlarms  = "Du bekommst diese E-Mail, weil du E-Mail-Benachrichtigungen eingeschaltet hast. Ändern kannst du das in MindSift unter Kontoeinstellungen → Alarme."
+	mailFooterAccount = "Diese E-Mail betrifft dein MindSift-Konto und kommt deshalb unabhängig von deinen Benachrichtigungen."
+)
+
+// priorityLabel / priorityTone: how a task's priority reads and is coloured in mails
+func priorityLabel(p string) string {
+	switch p {
+	case "urgent":
+		return "Dringend"
+	case "high":
+		return "Wichtig"
+	case "low":
+		return "Niedrig"
+	}
+	return "Normal"
+}
+
+func priorityTone(p string) string {
+	switch p {
+	case "urgent":
+		return "danger"
+	case "high":
+		return "warning"
+	}
+	return ""
+}
+
+// dueAlarmMail: one task is due now.
+func (s *Server) dueAlarmMail(a storage.DueTaskAlarm, due string) mailContent {
+	meta := "Fällig: " + due
+	if a.Priority != "" && a.Priority != "normal" {
+		meta += " · " + priorityLabel(a.Priority)
+	}
+	c := mailContent{
+		Preheader: "Fällig: " + a.Title,
+		Greeting:  mailGreeting(time.Now(), a.UserName),
+		Intro:     "Eine deiner Aufgaben ist jetzt fällig:",
+		Sections:  []mailSection{{Items: []mailItem{{Title: a.Title, Meta: meta, Body: a.Notes, Tone: priorityTone(a.Priority)}}}},
+		Footer:    mailFooterAlarms,
+	}
+	if link := s.notifyLink(); link != "" {
+		c.Button = &mailButton{Label: "In MindSift öffnen", URL: link}
+	}
+	return c
 }
 
 // sendEmailHTML sends text plus an optional HTML version (multipart/alternative).
@@ -181,8 +232,7 @@ func (s *Server) startAlarmTicker() {
 					}
 				case "email":
 					if a.AlarmEmail != "" {
-						emailBody := fmt.Sprintf("Hallo,\n\ndeine Aufgabe in MindSift ist fällig:\n\nAufgabe: %s\nFällig am: %s\nPriorität: %s\nNotizen: %s\n", a.Title, due, a.Priority, desc)
-						if err := s.sendEmailNotification(a.AlarmEmail, "⏰ Aufgabe fällig: "+a.Title, emailBody); err == nil {
+						if err := s.sendMailContent(a.AlarmEmail, "⏰ Fällig: "+a.Title, s.dueAlarmMail(a, due)); err == nil {
 							sentAny = true
 						}
 					}