Merge feature/permissions-hardening: RBAC hardening + B-lite + P0 UX

Phase A (security): permission registry, audit log on perm/feature changes,

token_version bump on permission changes.

B-lite: requireFeature middleware blocks API on disabled global flags.

P0 UX: search, modified-dot, confirm on critical perms, badge wording.

Conflict resolution: admin.js monolith was restructured into

frontend/js/admin/sections/* by feature/admin-redesign merge. P0 UX

edits (originally in monolith) were manually ported to:

- sections/permissions.js — modDot, confirm gate, filterPermissions

- sections/users.js — 'Инд.' → 'Индивидуально' badge in user-perms modal

admin.html search input + dot CSS auto-merged cleanly.

frontend/js/admin/sections/users.js

@@ -362,7 +362,7 @@
       const hasOverride = p.userVal !== undefined;
       const checked = p.effective;
       const badge = hasOverride
-        ? `<span style="font-size:10px;padding:2px 7px;border-radius:var(--r-pill);background:rgba(155,93,229,0.12);color:var(--violet);font-weight:700">Инд.</span>`
+        ? `<span style="font-size:11px;padding:2px 5px;border-radius:var(--r-pill);background:rgba(155,93,229,0.12);color:var(--violet);font-weight:700">Индивидуально</span>`
         : `<span style="font-size:10px;padding:2px 7px;border-radius:var(--r-pill);background:rgba(136,152,170,0.12);color:var(--text-3);font-weight:700">По роли</span>`;
       const resetBtn = hasOverride
         ? `<button style="background:none;border:none;cursor:pointer;color:var(--text-3);padding:3px 6px;border-radius:6px;font-size:11px;font-weight:700;transition:color .2s"