Fix week mismatch in profile views

Some parts of the page started weeks with Sunday, others with Monday,
causing inconsistencies in the view. Now everything uses ISO weeks
starting with Monday.

Author: dutow

app/controllers/concerns/profile_activity.rb

@@ -171,10 +171,8 @@ def build_contribution_weeks(year, filters: nil)
     return [[], []] if ids.blank?
 
     year = year.to_i
-    start_date = Date.new(year, 1, 1)
-    end_date = Date.new(year, 12, 31)
-    start_date -= start_date.wday
-    end_date += (6 - end_date.wday)
+    start_date = Date.commercial(year, 1, 1)
+    end_date = Date.commercial(year, Date.new(year, 12, 28).cweek, 7)
 
     counts = build_filtered_contribution_counts(start_date, end_date, filters)
 

app/views/shared/profile/_contributions.html.slim

@@ -22,7 +22,7 @@ div data-controller="contrib-calendar" data-contrib-calendar-filter-selector-val
             - else
               span.contrib-week-empty = week[:week]
     tbody
-      - weekday_labels = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
+      - weekday_labels = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
       - 7.times do |row|
         tr
           th.contrib-label = weekday_labels[row]