Improve deploy key and webhook URL display

- Format deploy key with comment: upaas-<date>-<vhost>
- Build webhook URL using Host header with https://

internal/handlers/app.go

@@ -5,6 +5,8 @@ import (
 	"database/sql"
 	"net/http"
 	"strconv"
+	"strings"
+	"time"
 
 	"github.com/go-chi/chi/v5"
 
@@ -124,7 +126,9 @@ func (h *Handlers) HandleAppDetail() http.HandlerFunc {
 			recentDeploymentsLimit,
 		)
 
-		webhookURL := "/webhook/" + application.WebhookSecret
+		host := request.Host
+		webhookURL := "https://" + host + "/webhook/" + application.WebhookSecret
+		deployKey := formatDeployKey(application.SSHPublicKey, application.CreatedAt, host)
 
 		data := map[string]any{
 			"App":         application,
@@ -133,6 +137,7 @@ func (h *Handlers) HandleAppDetail() http.HandlerFunc {
 			"Volumes":     volumes,
 			"Deployments": deployments,
 			"WebhookURL":  webhookURL,
+			"DeployKey":   deployKey,
 			"Success":     request.URL.Query().Get("success"),
 		}
 
@@ -679,3 +684,18 @@ func (h *Handlers) HandleVolumeDelete() http.HandlerFunc {
 		http.Redirect(writer, request, "/apps/"+appID, http.StatusSeeOther)
 	}
 }
+
+// formatDeployKey formats an SSH public key with a descriptive comment.
+// Format: ssh-ed25519 AAAA... upaas-2025-01-15-example.com.
+func formatDeployKey(pubKey string, createdAt time.Time, host string) string {
+	const minKeyParts = 2
+
+	parts := strings.Fields(pubKey)
+	if len(parts) < minKeyParts {
+		return pubKey
+	}
+
+	comment := "upaas-" + createdAt.Format("2006-01-02") + "-" + host
+
+	return parts[0] + " " + parts[1] + " " + comment
+}

templates/app_detail.html

@@ -50,7 +50,7 @@
         <h2 class="section-title mb-4">Deploy Key</h2>
         <p class="text-sm text-gray-500 mb-3">Add this SSH public key to your repository as a read-only deploy key:</p>
         <div class="copy-field">
-            <code id="deploy-key" class="copy-field-value text-xs">{{.App.SSHPublicKey}}</code>
+            <code id="deploy-key" class="copy-field-value text-xs">{{.DeployKey}}</code>
             <button
                 type="button"
                 data-copy-target="deploy-key"