Fix login session persistence + add admin accounts

- Fix JWT secret regenerating on every HMR cycle (globalThis cache)
- Replace unreliable response.cookies.set() with manual Set-Cookie header
- Remove jwt-secret.ts abstraction — JWT_SECRET back inline in auth.ts
- Sidebar logo links directly to /dashboard instead of server-redirect /
- Add 3 admin users to seed: ewan/caitlin/dillen (ADMIN role)
- Fix bcrypt hash corruption from PowerShell $ interpolation
- Remove plaintext passwords from codebase
- Fix audit_password_change trigger UUID type error

database/migrations/002_seed.sql

@@ -195,6 +195,9 @@ ON CONFLICT DO NOTHING;
 --   admin_demo      / AdminAccess@2026
 --   sales_demo      / SalesAccess@2026
 --   dev_demo        / DevTesting@2026
+--   ewan            (password change required on first login)
+--   caitlin         (password change required on first login)
+--   dillen          (password change required on first login)
 
 INSERT INTO users (id, username, email, password_hash, first_name, last_name, is_active, password_change_required) VALUES
     ('00000000-0000-0000-0000-000000000001', 'superadmin_demo', 'superadmin@coastit.co.za',
@@ -208,7 +211,16 @@ INSERT INTO users (id, username, email, password_hash, first_name, last_name, is
      'Sales', 'User', TRUE, TRUE),
     ('00000000-0000-0000-0000-000000000004', 'dev_demo', 'dev@coastit.co.za',
      '$2b$12$ghyJFb17lXoFOCYUPB6Fk.q8wDNOJhq9OUPNzd5DKaZsDjCF2NBJa',
-     'Dev', 'User', TRUE, TRUE)
+     'Dev', 'User', TRUE, TRUE),
+    ('00000000-0000-0000-0000-000000000005', 'ewan', 'ewan@coastit.co.za',
+     '$2b$12$nO.9p.f4oWFhfScxM8MGQuiR9YjU85YTIqcb1kS.kyDBMHdmQ.EyG',
+     'Ewan', 'Scheepers', TRUE, TRUE),
+    ('00000000-0000-0000-0000-000000000006', 'caitlin', 'caitlin@coastit.co.za',
+     '$2b$12$I5FHjje4OA5raP3642twT.Wmcl00rA1/wDPiQjRK14yDgybUjmrYG',
+     'Caitlin', 'Hermanus', TRUE, TRUE),
+    ('00000000-0000-0000-0000-000000000007', 'dillen', 'dillen@coastit.co.za',
+     '$2b$12$QnvaRzdJEV/Bq8tp5vguM.ad.oeAcV2bjdzndIFdA4Opn5vY2WVaW',
+     'Dillen', 'van der Merwe', TRUE, TRUE)
 ON CONFLICT (username) WHERE (deleted_at IS NULL) DO NOTHING;
 
 -- Update the SUPER_ADMIN to set created_by to self (post-bootstrap)
@@ -217,7 +229,7 @@ WHERE id = '00000000-0000-0000-0000-000000000001' AND created_by IS NULL;
 
 -- Set created_by for other users (SUPER_ADMIN created them)
 UPDATE users SET created_by = '00000000-0000-0000-0000-000000000001'
-WHERE id IN ('00000000-0000-0000-0000-000000000002','00000000-0000-0000-0000-000000000003','00000000-0000-0000-0000-000000000004')
+WHERE id IN ('00000000-0000-0000-0000-000000000002','00000000-0000-0000-0000-000000000003','00000000-0000-0000-0000-000000000004','00000000-0000-0000-0000-000000000005','00000000-0000-0000-0000-000000000006','00000000-0000-0000-0000-000000000007')
   AND created_by IS NULL;
 
 -- ============================================================================
@@ -233,7 +245,10 @@ ON CONFLICT DO NOTHING;
 INSERT INTO user_roles (user_id, role_id, assigned_by) VALUES
     ('00000000-0000-0000-0000-000000000002', '00000002-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001'),
     ('00000000-0000-0000-0000-000000000003', '00000003-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001'),
-    ('00000000-0000-0000-0000-000000000004', '00000004-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001')
+    ('00000000-0000-0000-0000-000000000004', '00000004-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001'),
+    ('00000000-0000-0000-0000-000000000005', '00000002-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001'),
+    ('00000000-0000-0000-0000-000000000006', '00000002-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001'),
+    ('00000000-0000-0000-0000-000000000007', '00000002-0000-0000-0000-000000000000', '00000000-0000-0000-0000-000000000001')
 ON CONFLICT DO NOTHING;
 
 -- ============================================================================

database/migrations/013_security_upgrade.sql

@@ -595,6 +595,11 @@ WHERE id = '00000000-0000-0000-0000-000000000003' AND password_encrypted IS NULL
 UPDATE users SET password_encrypted = encrypt_password('DevTesting@2026')
 WHERE id = '00000000-0000-0000-0000-000000000004' AND password_encrypted IS NULL;
 
+-- NOTE: New admin users (ewan, caitlin, dillen) have password_encrypted=NULL.
+-- They will set their own passwords on first login (password_change_required=TRUE).
+-- SUPER_ADMIN can populate password_encrypted later via the recovery endpoint
+-- after users have set their chosen passwords.
+
 -- ============================================================================
 -- FUTURE REQUIREMENT NOTE:
 -- If this system is ever exposed publicly, remove reversible password storage