feat: complete go rewrite

internal/handlers/newsletter.go

@@ -0,0 +1,28 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/rideaware/admin-panel/internal/email"
+
+	"github.com/gin-gonic/gin"
+)
+
+func SendUpdateGet(c *gin.Context) {
+	c.HTML(http.StatusOK, "send_update.html", gin.H{})
+}
+
+func SendUpdatePost(c *gin.Context) {
+	subject := c.PostForm("subject")
+	body := c.PostForm("body")
+
+	message, err := email.SendUpdate(subject, body)
+	if err != nil {
+		c.HTML(http.StatusOK, "send_update.html",
+			gin.H{"error": message})
+		return
+	}
+
+	c.HTML(http.StatusOK, "send_update.html",
+		gin.H{"success": message})
+}