fix: terminate failed scans in Temporal and surface the reason when following (#429)

* fix(cli): skip splash screen off a TTY (e.g. CI)

* fix: terminate failed scans in Temporal and surface the reason when following

* fix(cli): indent embedded newlines within failure-error segments

* fix(worker): omit the Agent Breakdown section when no agents completed

* fix(cli): don't reprint the failure reason when the log already showed it

* fix(worker): indent embedded newlines within the workflow.log error block

apps/cli/src/scan/failure.ts

@@ -0,0 +1,31 @@
+/**
+ * Rendering for the worker's '|'-delimited failure string.
+ *
+ * `formatWorkflowError` in the worker joins error segments — phase context, error type,
+ * message, and remediation hint — with '|' as a delimiter. These helpers turn that raw
+ * string into readable output for the CLI's own surfaces.
+ */
+
+/**
+ * Split the failure string into trimmed, non-empty lines. Segments are delimited by '|', and a
+ * segment's own embedded newlines (e.g. a multi-line validation message) become their own lines so
+ * each aligns with the rest of the block.
+ */
+export function parseFailureSegments(message: string): string[] {
+  return message
+    .split(/[|\n]/)
+    .map((segment) => segment.trim())
+    .filter((segment) => segment.length > 0);
+}
+
+/** Multi-line block: one segment per indented line (the caller prints the header). */
+export function indentFailureSegments(message: string, indent = '  '): string {
+  return parseFailureSegments(message)
+    .map((segment) => `${indent}${segment}`)
+    .join('\n');
+}
+
+/** Single-line summary for compact contexts like the status footer. */
+export function inlineFailureReason(message: string): string {
+  return parseFailureSegments(message).join(' — ');
+}