Fix board members 0-count, bulk email 0-recipients, 502 on cold start, and duplicate statuses

- Board members: switch to supabaseAdmin to bypass dues_payments RLS on members_with_dues view
- Bulk email: query members_with_dues view with status_name instead of nonexistent status column on members table
- 502 error: skip setupCheckHandle DB query for login/signup/public/static routes, increase cache TTL to 5min
- Duplicate statuses: add migration 026 to deduplicate Active/active entries, add defensive dedup in admin members loader

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

supabase/migrations/026_fix_duplicate_statuses.sql

@@ -0,0 +1,24 @@
+-- Fix duplicate membership statuses
+-- The database has both "Active" (capitalized name) and "active" (lowercase) entries.
+-- The seed data only creates "active" - the "Active" entry was added manually.
+-- We need to:
+-- 1. Move any members pointing to the duplicate "Active" status to the original "active" status
+-- 2. Delete the duplicate "Active" entry
+
+-- First, update any members that reference the duplicate "Active" (capitalized) status
+-- to point to the original "active" (lowercase) status
+UPDATE public.members
+SET membership_status_id = (
+  SELECT id FROM public.membership_statuses WHERE name = 'active' LIMIT 1
+)
+WHERE membership_status_id IN (
+  SELECT id FROM public.membership_statuses WHERE name = 'Active'
+);
+
+-- Delete the duplicate "Active" (capitalized) status entry
+DELETE FROM public.membership_statuses WHERE name = 'Active';
+
+-- Ensure the remaining "active" status has correct sort_order
+UPDATE public.membership_statuses
+SET sort_order = 2, display_name = 'Active', color = '#22c55e'
+WHERE name = 'active';