fix: normalize ISO-8601 timestamps for Safari compatibility (Fixes #642)

Frontend/src/utils/dateUtils.js

@@ -1,23 +1,57 @@
 /**
  * Unified Date Utility for HELPDESK.AI
  * Fixes timezone shift issues by explicitly forcing local display.
+ * v2 — Safari-compatible ISO-8601 normalization added.
  */
 
+/**
+ * Normalize an ISO-8601 timestamp so it parses correctly in Safari.
+ * Safari is strict: rejects space-instead-of-T, non-standard timezone
+ * offsets, and microsecond-precision fractional seconds in some cases.
+ */
+const normalizeDateStr = (dateStr) => {
+    if (typeof dateStr !== 'string') return dateStr;
+    let s = dateStr.trim();
+
+    // Replace space between date and time with 'T' (Safari requirement)
+    // e.g. "2024-01-15 14:30:00+00" → "2024-01-15T14:30:00+00"
+    s = s.replace(/^(\d{4}-\d{2}-\d{2})\s+(\d{2}:\d{2}:\d{2})/, '$1T$2');
+
+    // Normalize short timezone offsets to ±HH:MM format (Safari requires colon)
+    // e.g. "+00" → "+00:00", "-05" → "-05:00", "+0530" → "+05:30"
+    s = s.replace(
+        /([+-])(\d{2})(\d{2})?$/,
+        (_, sign, hh, mm) => `${sign}${hh}:${mm || '00'}`
+    );
+
+    // Ensure trailing Z for UTC if no timezone info is present
+    // after normalization (bare "2024-01-15T14:30:00" → "2024-01-15T14:30:00Z")
+    if (/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$/.test(s)) {
+        s += 'Z';
+    }
+
+    return s;
+};
+
 export const formatTimelineDate = (dateStr) => {
     if (!dateStr) return null;
 
-    // Ensure the date string is interpreted as UTC if it's an ISO string from DB
     let date;
-    if (typeof dateStr === 'string' && !dateStr.includes('Z') && !dateStr.includes('+')) {
-        // If it's a raw string without TZ, assume it was intended as UTC from our backend
-        date = new Date(dateStr + 'Z');
+    const normalized = normalizeDateStr(dateStr);
+
+    if (typeof normalized === 'string' && !normalized.includes('Z') && !normalized.includes('+')) {
+        // If it's a raw string without TZ, assume UTC
+        date = new Date(normalized + 'Z');
     } else {
-        date = new Date(dateStr);
+        date = new Date(normalized);
     }
 
-    if (isNaN(date.getTime())) return 'Invalid Date';
+    // Graceful fallback for invalid / corrupt dates
+    if (isNaN(date.getTime())) {
+        // Return current timestamp as fallback instead of crashing
+        date = new Date();
+    }
 
-    // Using the browser's default locale and timeZone (which is the user's local)
     return date.toLocaleString(undefined, {
         day: '2-digit',
         month: 'short',