fix: restore Help TOC (18 links) + fix Settings TOC (14 correct IDs)

Help TOC: restored from commit 8db9f44 — 18 help-* links
Settings TOC: fixed IDs to match actual section anchors
  cfg-perf -> cfg-performance, cfg-backend-settings -> cfg-parametres-backend-*,
  cfg-recent -> cfg-historique-recent-*, cfg-shares -> cfg-partages-publics

{sessionStorage.setItem('obsigate_access_token'

@@ -0,0 +1 @@
+{"success":false,"data":null,"error":"Evaluation error: SyntaxError: Unexpected token ','"}