Add Administration user management: list, password reset, email change, group assignments

Wires the previously-unused fis_admin_* user/group stored procs into the Admin
module (fds_sys-gated), adds a users grid with a per-row ribbon (reset
password, change email, manage group membership), and always emails a
password reset result to the user rather than showing it to the admin.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Fuchs/js/intranet/modules/fis.admin.scss

@@ -188,6 +188,29 @@
         color: #fff;
         border-color: rgba(255, 255, 255, 0.4);
     }
+
+    .adm_users_bd table tbody tr {
+        cursor: pointer;
+
+        &:hover td { background-color: #f3f6fb; }
+    }
+}
+
+.adm_groups_dlg {
+    padding: 0.25rem 0;
+
+    .adm_group_row {
+        display: flex;
+        align-items: center;
+        gap: 0.5rem;
+        padding: 0.35rem 0;
+        border-bottom: 1px solid #eee;
+
+        &:last-child { border-bottom: none; }
+
+        input[type="checkbox"] { margin: 0; }
+        label { margin: 0; font-weight: normal; }
+    }
 }
 
 .adm_note {