Add deployment improvements and UI enhancements

- Clone specific commit SHA from webhook instead of just branch HEAD
- Log webhook payload in deployment logs
- Add build/deploy timing to ntfy and Slack notifications
- Implement container rollback on deploy failure
- Remove old container only after successful deployment
- Show relative times in deployment history (hover for full date)
- Update port mappings UI with labeled text inputs
- Add footer with version info, license, and repo link
- Format deploy key comment as upaas_DATE_appname

internal/models/deployment.go

@@ -21,6 +21,14 @@ const (
 	DeploymentStatusFailed    DeploymentStatus = "failed"
 )
 
+// Display constants.
+const (
+	// secondsPerMinute is used for duration formatting.
+	secondsPerMinute = 60
+	// shortCommitLength is the number of characters to show for commit SHA.
+	shortCommitLength = 12
+)
+
 // Deployment represents a deployment attempt for an app.
 type Deployment struct {
 	db *database.Database
@@ -90,6 +98,61 @@ func (d *Deployment) MarkFinished(
 	return d.Save(ctx)
 }
 
+// Duration returns the duration of the deployment as a formatted string.
+// Returns empty string if deployment is not finished.
+func (d *Deployment) Duration() string {
+	if !d.FinishedAt.Valid {
+		return ""
+	}
+
+	duration := d.FinishedAt.Time.Sub(d.StartedAt)
+
+	// Format as minutes and seconds
+	minutes := int(duration.Minutes())
+	seconds := int(duration.Seconds()) % secondsPerMinute
+
+	if minutes > 0 {
+		return fmt.Sprintf("%dm %ds", minutes, seconds)
+	}
+
+	return fmt.Sprintf("%ds", seconds)
+}
+
+// ShortCommit returns a truncated commit SHA for display.
+// Returns "-" if no commit SHA is set.
+func (d *Deployment) ShortCommit() string {
+	if !d.CommitSHA.Valid || d.CommitSHA.String == "" {
+		return "-"
+	}
+
+	sha := d.CommitSHA.String
+	if len(sha) > shortCommitLength {
+		return sha[:shortCommitLength]
+	}
+
+	return sha
+}
+
+// FinishedAtISO returns the finished time in ISO format for JavaScript parsing.
+// Falls back to started time if not finished yet.
+func (d *Deployment) FinishedAtISO() string {
+	if d.FinishedAt.Valid {
+		return d.FinishedAt.Time.Format(time.RFC3339)
+	}
+
+	return d.StartedAt.Format(time.RFC3339)
+}
+
+// FinishedAtFormatted returns the finished time formatted for display.
+// Falls back to started time if not finished yet.
+func (d *Deployment) FinishedAtFormatted() string {
+	if d.FinishedAt.Valid {
+		return d.FinishedAt.Time.Format("2006-01-02 15:04:05")
+	}
+
+	return d.StartedAt.Format("2006-01-02 15:04:05")
+}
+
 func (d *Deployment) insert(ctx context.Context) error {
 	query := `
 		INSERT INTO deployments (