fix: normalize rounded duration units

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 
-## 0.0.14-beta.1 — 2026-07-14
+## 0.0.14-beta.1 — 2026-07-16
+
+### Fixes
+- Normalize rounded duration units so formatting never emits invalid `60.0s`, `1m 60s`, or `59m 60s` values. (#521)
 
 ### Docs
 - AgentEye docs: lead the Agent Observability sidebar with a Features group (one page per top-level feature), move Deployment to the last group, and publish the new per-feature pages, autoplaying demo embeds, and an AI assistant screenshot. (#548)

__tests__/lib/format-duration.test.ts

@@ -26,6 +26,10 @@ describe("formatDuration", () => {
     expect(formatDuration(3200)).toBe("3.2s");
   });
 
+  it("rounds seconds up to a minute", () => {
+    expect(formatDuration(59999)).toBe("1m 0s");
+  });
+
   it("boundary: exactly 60000ms", () => {
     expect(formatDuration(60000)).toBe("1m 0s");
   });
@@ -34,6 +38,14 @@ describe("formatDuration", () => {
     expect(formatDuration(312000)).toBe("5m 12s");
   });
 
+  it("rounds seconds up without emitting 60s", () => {
+    expect(formatDuration(119600)).toBe("2m 0s");
+  });
+
+  it("rounds minutes up to an hour", () => {
+    expect(formatDuration(3599600)).toBe("1h 0m");
+  });
+
   it("boundary: exactly 3600000ms", () => {
     expect(formatDuration(3600000)).toBe("1h 0m");
   });

lib/format-duration.ts

@@ -17,13 +17,18 @@ export function formatRelativeTime(ts: number): string {
 export function formatDuration(ms: number): string {
   if (ms < 1000) return `${ms}ms`;
   const seconds = ms / 1000;
-  if (seconds < 60) return `${seconds.toFixed(1)}s`;
-  const totalMinutes = Math.floor(seconds / 60);
+  if (seconds < 60) {
+    const tenths = Math.round(seconds * 10);
+    if (tenths < 600) return `${(tenths / 10).toFixed(1)}s`;
+  }
+
+  const totalSeconds = Math.round(seconds);
+  const totalMinutes = Math.floor(totalSeconds / 60);
   if (totalMinutes >= 60) {
     const hours = Math.floor(totalMinutes / 60);
     const remainingMinutes = totalMinutes % 60;
     return `${hours}h ${remainingMinutes}m`;
   }
-  const remainingSeconds = (seconds % 60).toFixed(0);
+  const remainingSeconds = totalSeconds % 60;
   return `${totalMinutes}m ${remainingSeconds}s`;
 }