fix(profile): correct heatmap month labels

scripts/generate_heatmap_svg.py

@@ -55,18 +55,30 @@ def weekday_row(day):
     return (day.weekday() + 1) % 7
 
 
-def month_labels(start, end):
-    labels = [(0, start.strftime("%b"))]
-    total_weeks = ((end - start).days // 7) + 1
+def month_labels(grid_start, visible_start, grid_end):
+    labels = []
+    total_weeks = ((grid_end - grid_start).days // 7) + 1
 
     for week in range(total_weeks):
-        week_start = start + timedelta(days=week * 7)
+        week_start = grid_start + timedelta(days=week * 7)
+        week_label = None
+
         for offset in range(7):
             day = week_start + timedelta(days=offset)
-            if day.day == 1 and week != 0:
-                labels.append((week, day.strftime("%b")))
+            if day < visible_start:
+                continue
+
+            if week == 0 and week_label is None:
+                week_label = day.strftime("%b")
+
+            if day.day == 1:
+                week_label = day.strftime("%b")
                 break
 
+        if week_label is not None:
+            if not labels or labels[-1][1] != week_label:
+                labels.append((week, week_label))
+
     return labels
 
 
@@ -108,7 +120,7 @@ def generate_svg(data):
         '</style>',
     ]
 
-    for week, label in month_labels(aligned_start, aligned_end):
+    for week, label in month_labels(aligned_start, start, aligned_end):
         x = LEFT_PAD + (week * CELL)
         svg.append(f'<text x="{x}" y="10">{label}</text>')