Sort exercise records by weight descending (#113)

- Updated record rendering to sort fetched exercise records before displaying them in the table. Records are now ordered by weight descending (heaviest first), and for equal weights by reps ascending (fewest reps first), matching your requested top-to-bottom order.
- Switched empty-state and caption logic to use the sorted list, keeping the “no records” and context messaging behavior consistent after sorting.
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[Codex Task](https://chatgpt.com/codex/tasks/task_e_698c3e1f243c83258e357104e9028d7f)

Author: rodrigogiraoserrao

workout-exercise-record.html

@@ -349,18 +349,20 @@ <h2 style="margin: 0;">Workout tools</h2>
             noRecordNote.textContent = '';
             try {
                 const data = await apiFetch(`/exercises/${encodeURIComponent(name)}/records`);
-                (data.records || []).forEach((rec) => {
+                const sortedRecords = sortRecords(data.records || []);
+
+                sortedRecords.forEach((rec) => {
                     const row = document.createElement('tr');
                     row.innerHTML = `<td>${rec.weight}</td><td>${rec.reps}</td>`;
                     recordRows.appendChild(row);
                 });
-                if (!data.records || data.records.length === 0) {
+                if (sortedRecords.length === 0) {
                     const row = document.createElement('tr');
                     row.innerHTML = '<td colspan="2">No personal bests yet.</td>';
                     recordRows.appendChild(row);
                     noRecordNote.textContent = `${displayName} has no records yet.`;
                 }
-                updateRecordsCaption(displayName, data.records && data.records.length > 0);
+                updateRecordsCaption(displayName, sortedRecords.length > 0);
                 loadStatus.textContent = '';
             } catch (error) {
                 loadStatus.textContent = error.message;
@@ -376,6 +378,13 @@ <h2 style="margin: 0;">Workout tools</h2>
             );
         }
 
+        function sortRecords(records) {
+            return [...records].sort((a, b) => {
+                if (b.weight !== a.weight) return b.weight - a.weight;
+                return a.reps - b.reps;
+            });
+        }
+
         function clearRecordInputs() {
             recordWeight.value = '';
             recordReps.value = '';