Default lessons to a week view on the booking page and in wp-admin

The front-end booking calendar now opens in the Week view (anchored to the
week of the earliest open slot) with List still available. The Scheduler and
My Lessons admin pages gain a week calendar (usc_view/usc_week, bucketed via
a new generic WeekCalendar::bucket()) and open in it by default; the original
table remains as the List view since it carries the HST / e-transfer forms.

Closes #76

Co-Authored-By: Claude Fable 5 <[email protected]>

assets/js/booking.js

@@ -76,9 +76,9 @@
         return [...groups.entries()].sort((a, b) => a[0].localeCompare(b[0]));
     }
 
-    // --- calendar view state (list is the default; week keeps its position) ---
+    // --- calendar view state (week is the default; week keeps its position) ---
     let allSlots  = [];
-    let view      = 'list';
+    let view      = 'week';
     let weekStart = null;
 
     const pad   = (n) => String(n).padStart(2, '0');
@@ -156,6 +156,10 @@
             return;
         }
 
+        // Anchor the week view to the week of the earliest open slot (the API
+        // returns slots ordered by start), so the first look is never empty.
+        if (view === 'week' && !weekStart) weekStart = weekStartOf(dayKey(allSlots[0].start_dt));
+
         slotList.innerHTML = toggleHtml() + (view === 'week' ? weekHtml() : listHtml());
         wireCalendarEvents();
     }
@@ -167,9 +171,6 @@
         });
         document.getElementById('us-view-week').addEventListener('click', () => {
             view = 'week';
-            // Default to the week of the earliest open slot (the API returns
-            // slots ordered by start), so the first look is never empty.
-            if (!weekStart) weekStart = weekStartOf(dayKey(allSlots[0].start_dt));
             render();
         });