Fix calendar timezone and group consulting slots by order

Calendar Timezone Fix:
- Add +07:00 timezone offset to date strings in create-google-meet-event
- Fixes 13:00 appearing as 20:00 in Google Calendar
- Now treats times as Asia/Jakarta time explicitly

Single Calendar Event per Order:
- handle-order-paid now creates ONE event for all slots in an order
- Uses first slot's start time and last slot's end time
- Updates all slots with the same meet_link
- Prevents duplicate calendar events for multi-slot orders

Admin Consulting Page Improvements:
- Group consulting slots by order_id
- Display as single row with continuous time range (start-end)
- Show session count when multiple slots (e.g., "2 sesi")
- Consistent with member-facing ConsultingHistory component
- Updated both desktop table and mobile card layouts
- Updated both upcoming and past tabs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

supabase/functions/create-google-meet-event/index.ts

@@ -202,8 +202,9 @@ serve(async (req: Request): Promise<Response> => {
     console.log("Got access token");
 
     // Build event data
-    const startDate = new Date(`${body.date}T${body.start_time}`);
-    const endDate = new Date(`${body.date}T${body.end_time}`);
+    // Include +07:00 timezone offset to ensure times are treated as Asia/Jakarta time
+    const startDate = new Date(`${body.date}T${body.start_time}+07:00`);
+    const endDate = new Date(`${body.date}T${body.end_time}+07:00`);
 
     const eventData = {
       summary: `Konsultasi: ${body.topic} - ${body.client_name}`,