Fix System page crash, retire "held" copy, and slim CLAUDE.md

- system.html crashed with a 500 whenever SABnzbd history loaded: the
  trend() macro compared the formatted "avg_speed" string (e.g. "900
  KB/s") against a number. Added a real numeric avg_speed_kbps field
  and pointed the macro at that instead.
- Replaced "held"/"not held" wording with "in library"/"not in
  library" on Home and Discover.
- Moved CLAUDE.md's Deployment/reverse-proxy and account-management
  sections into two on-demand skills (deploy-arr-summary,
  manage-accounts) so they only load when actually relevant, with a
  one-line pointer left in their place.
- Updated PRODUCT.md's restructure note now that meridian-marquee has
  merged to main.
- Dropped two stale/broken entries from settings.local.json's
  permission allowlist (a rule from a different machine/path, and one
  with a corrupted token).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NBw1QodG8ZMYHrGeQfqyDS

templates/home.html

@@ -27,7 +27,7 @@
     <a class="tt-row" href="{{ request.script_root }}/library">
       <span class="tt-row-num">102</span>
       <span class="tt-row-name">Library</span>
-      <span class="tt-row-body"><span class="tt-row-sub">Everything already held</span></span>
+      <span class="tt-row-body"><span class="tt-row-sub">Everything in library</span></span>
       {% if sonarr.status == 'ok' or radarr.status == 'ok' %}
         <span class="tt-row-val">{{ sonarr.total_series | default(0) }} SHOWS &nbsp;{{ radarr.total_movies | default(0) }} FILMS</span>
       {% else %}
@@ -38,7 +38,7 @@
     <a class="tt-row" href="{{ request.script_root }}/discover">
       <span class="tt-row-num">103</span>
       <span class="tt-row-name">Discover</span>
-      <span class="tt-row-body"><span class="tt-row-sub">Popular, and not yet held</span></span>
+      <span class="tt-row-body"><span class="tt-row-sub">Popular, and not yet in library</span></span>
       <span class="tt-row-val">{{ (rt_movies | length) + (rt_tv | length) }} SUGGESTED</span>
     </a>