fix(formatting): return null for missing values, strip trailing zeros

apps/sim/app/workspace/[workspaceId]/logs/utils.ts

@@ -370,7 +370,7 @@ export function mapToExecutionLogAlt(log: RawLogResponse): ExecutionLog {
  */
 export function formatLatency(ms: number): string {
   if (!Number.isFinite(ms) || ms <= 0) return '—'
-  return formatDuration(ms, { precision: 2 })
+  return formatDuration(ms, { precision: 2 }) ?? '—'
 }
 
 export const formatDate = (dateString: string) => {

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/terminal/terminal.tsx

@@ -128,7 +128,7 @@ const BlockRow = memo(function BlockRow({
         <StatusDisplay
           isRunning={isRunning}
           isCanceled={isCanceled}
-          formattedDuration={formatDuration(entry.durationMs, { precision: 2 })}
+          formattedDuration={formatDuration(entry.durationMs, { precision: 2 }) ?? '-'}
         />
       </span>
     </div>
@@ -201,7 +201,7 @@ const IterationNodeRow = memo(function IterationNodeRow({
           <StatusDisplay
             isRunning={hasRunningChild}
             isCanceled={hasCanceledChild}
-            formattedDuration={formatDuration(entry.durationMs, { precision: 2 })}
+            formattedDuration={formatDuration(entry.durationMs, { precision: 2 }) ?? '-'}
           />
         </span>
       </div>
@@ -314,7 +314,7 @@ const SubflowNodeRow = memo(function SubflowNodeRow({
           <StatusDisplay
             isRunning={hasRunningDescendant}
             isCanceled={hasCanceledDescendant}
-            formattedDuration={formatDuration(entry.durationMs, { precision: 2 })}
+            formattedDuration={formatDuration(entry.durationMs, { precision: 2 }) ?? '-'}
           />
         </span>
       </div>

apps/sim/background/workspace-notification-delivery.ts

@@ -297,7 +297,7 @@ async function deliverEmail(
     workflowName: payload.data.workflowName || 'Unknown Workflow',
     status: payload.data.status,
     trigger: payload.data.trigger,
-    duration: formatDuration(payload.data.totalDurationMs, { precision: 1 }),
+    duration: formatDuration(payload.data.totalDurationMs, { precision: 1 }) ?? '-',
     cost: formatCost(payload.data.cost),
     logUrl,
     alertReason,
@@ -310,7 +310,7 @@ async function deliverEmail(
     to: subscription.emailRecipients,
     subject,
     html,
-    text: `${subject}\n${alertReason ? `\nReason: ${alertReason}\n` : ''}\nWorkflow: ${payload.data.workflowName}\nStatus: ${statusText}\nTrigger: ${payload.data.trigger}\nDuration: ${formatDuration(payload.data.totalDurationMs, { precision: 1 })}\nCost: ${formatCost(payload.data.cost)}\n\nView Log: ${logUrl}${includedDataText}`,
+    text: `${subject}\n${alertReason ? `\nReason: ${alertReason}\n` : ''}\nWorkflow: ${payload.data.workflowName}\nStatus: ${statusText}\nTrigger: ${payload.data.trigger}\nDuration: ${formatDuration(payload.data.totalDurationMs, { precision: 1 }) ?? '-'}\nCost: ${formatCost(payload.data.cost)}\n\nView Log: ${logUrl}${includedDataText}`,
     emailType: 'notifications',
   })
 
@@ -370,7 +370,7 @@ async function deliverSlack(
         { type: 'mrkdwn', text: `*Trigger:*\n${payload.data.trigger}` },
         {
           type: 'mrkdwn',
-          text: `*Duration:*\n${formatDuration(payload.data.totalDurationMs, { precision: 1 })}`,
+          text: `*Duration:*\n${formatDuration(payload.data.totalDurationMs, { precision: 1 }) ?? '-'}`,
         },
         { type: 'mrkdwn', text: `*Cost:*\n${formatCost(payload.data.cost)}` },
       ],

apps/sim/lib/core/utils/formatting.ts

@@ -156,15 +156,15 @@ export function formatCompactTimestamp(iso: string): string {
  * Format a duration to a human-readable format
  * @param duration - Duration in milliseconds (number) or as string (e.g., "500ms")
  * @param options - Optional formatting options
- * @param options.precision - Number of decimal places for seconds (default: 0)
- * @returns A formatted duration string
+ * @param options.precision - Number of decimal places for seconds (default: 0), trailing zeros are stripped
+ * @returns A formatted duration string, or null if input is null/undefined
  */
 export function formatDuration(
   duration: number | string | undefined | null,
   options?: { precision?: number }
-): string {
+): string | null {
   if (duration === undefined || duration === null) {
-    return '-'
+    return null
   }
 
   // Parse string durations (e.g., "500ms", "0.44ms", "1234")
@@ -192,7 +192,11 @@ export function formatDuration(
 
   const seconds = ms / 1000
   if (seconds < 60) {
-    return precision > 0 ? `${seconds.toFixed(precision)}s` : `${Math.floor(seconds)}s`
+    if (precision > 0) {
+      // Strip trailing zeros (e.g., "5.00s" -> "5s", "5.10s" -> "5.1s")
+      return `${seconds.toFixed(precision).replace(/\.?0+$/, '')}s`
+    }
+    return `${Math.floor(seconds)}s`
   }
 
   const minutes = Math.floor(seconds / 60)