Initial release v1.0.0

frontend/utils/formatTime.ts

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+/**
+ * Format seconds into a human-readable time string
+ * For durations under 1 hour: m:ss (e.g., 5:32)
+ * For durations 1 hour or more: h:mm:ss (e.g., 1:05:32)
+ */
+export function formatTime(seconds: number): string {
+    if (isNaN(seconds) || !isFinite(seconds) || seconds < 0) return "0:00";
+    
+    const hours = Math.floor(seconds / 3600);
+    const mins = Math.floor((seconds % 3600) / 60);
+    const secs = Math.floor(seconds % 60);
+    
+    if (hours > 0) {
+        return `${hours}:${mins.toString().padStart(2, "0")}:${secs.toString().padStart(2, "0")}`;
+    }
+    return `${mins}:${secs.toString().padStart(2, "0")}`;
+}
+
+/**
+ * Format seconds into a human-readable duration string
+ * Always shows full format for clarity (e.g., "2h 30m" or "45m")
+ */
+export function formatDuration(seconds: number): string {
+    if (isNaN(seconds) || !isFinite(seconds) || seconds < 0) return "0m";
+    
+    const hours = Math.floor(seconds / 3600);
+    const mins = Math.floor((seconds % 3600) / 60);
+    
+    if (hours > 0) {
+        if (mins > 0) {
+            return `${hours}h ${mins}m`;
+        }
+        return `${hours}h`;
+    }
+    return `${mins}m`;
+}
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