Hide config backup and config change features from UI

Temporarily hide config change tracking, config timeline links,
and config backup references across dashboard, site show, trace,
and home page. Code preserved with hidden class / HTML comments.

lib/towerops_web/controllers/page_html/home.html.heex

@@ -137,19 +137,7 @@
             Filter by critical/unresolved/all. Resolve directly from the alert view.
           </p>
         </div>
-        <!-- Feature 4 -->
-        <div class="relative rounded-2xl bg-white/10 p-8 ring-1 ring-white/10">
-          <div class="flex items-center gap-x-3">
-            <div class="flex h-10 w-10 items-center justify-center rounded-lg bg-white/20">
-              <.icon name="hero-clock" class="h-6 w-6 text-white" />
-            </div>
-            <h3 class="text-lg font-semibold text-white">Config Change Tracking</h3>
-          </div>
-          <p class="mt-4 text-sm text-blue-100">
-            Correlate config changes with performance shifts. See a timeline of what changed,
-            when, and whether it caused problems — before you start guessing.
-          </p>
-        </div>
+        <!-- Feature 4 — Config Change Tracking hidden, feature temporarily disabled -->
         <!-- Feature 5 -->
         <div class="relative rounded-2xl bg-white/10 p-8 ring-1 ring-white/10">
           <div class="flex items-center gap-x-3">
@@ -160,7 +148,7 @@
           </div>
           <p class="mt-4 text-sm text-blue-100">
             Enriched site pages with subscriber counts, device health grids, active alerts,
-            latency charts, and recent config changes — all on one screen.
+            latency charts, and active alerts — all on one screen.
           </p>
         </div>
         <!-- Feature 6 -->
@@ -368,10 +356,7 @@
               <.icon name="hero-check" class="h-5 w-5 text-blue-600 flex-shrink-0" />
               Subscriber trace &amp; alert triage
             </div>
-            <div class="flex items-center gap-2">
-              <.icon name="hero-check" class="h-5 w-5 text-blue-600 flex-shrink-0" />
-              Config change tracking
-            </div>
+            <%!-- Config change tracking hidden — feature temporarily disabled --%>
             <div class="flex items-center gap-2">
               <.icon name="hero-check" class="h-5 w-5 text-blue-600 flex-shrink-0" />
               Team access &amp; email alerts

lib/towerops_web/live/dashboard_live.html.heex

@@ -725,12 +725,7 @@
               {@device_unknown}
             </span>
           </div>
-          <div class="flex items-center justify-between px-3 py-2">
-            <span class="text-xs text-gray-500 dark:text-gray-400">Config changes (7d)</span>
-            <span class="font-mono text-sm text-gray-900 dark:text-white">
-              {length(@recent_config_changes)}
-            </span>
-          </div>
+          <%!-- Config changes row hidden — feature temporarily disabled --%>
           <div class="flex items-center justify-between px-3 py-2">
             <span class="text-xs text-gray-500 dark:text-gray-400">Active incidents</span>
             <span class={[
@@ -746,8 +741,8 @@
         </div>
       </div>
 
-      <%!-- Config Changes --%>
-      <div>
+      <%!-- Config Changes — hidden, feature temporarily disabled --%>
+      <div class="hidden">
         <div class="flex items-center justify-between mb-2">
           <h2 class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
             Config Changes <span class="font-normal text-gray-400 dark:text-gray-500">(7d)</span>

lib/towerops_web/live/site_live/show.html.heex

@@ -251,8 +251,8 @@
         </div>
       </div>
 
-      <%!-- Recent Config Changes Panel --%>
-      <div class="rounded-lg border border-gray-200 bg-white dark:border-white/10 dark:bg-gray-800/50">
+      <%!-- Recent Config Changes Panel — hidden, feature temporarily disabled --%>
+      <div class="hidden rounded-lg border border-gray-200 bg-white dark:border-white/10 dark:bg-gray-800/50">
         <div class="p-4">
           <h3 class="text-sm font-semibold text-gray-900 dark:text-white flex items-center gap-1.5">
             <.icon name="hero-document-text" class="h-5 w-5" /> Recent Config Changes

lib/towerops_web/live/trace_live/index.html.heex

@@ -422,8 +422,8 @@
 
       <%!-- Recent Activity: Config Changes + Insights --%>
       <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
-        <%!-- Config Changes --%>
-        <div class="card bg-base-100 shadow-sm border border-base-200 dark:border-white/10 dark:bg-gray-900">
+        <%!-- Config Changes — hidden, feature temporarily disabled --%>
+        <div class="hidden card bg-base-100 shadow-sm border border-base-200 dark:border-white/10 dark:bg-gray-900">
           <div class="card-body p-4 sm:p-6">
             <h3 class="font-semibold text-sm uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-3">
               <.icon name="hero-document-text" class="h-4 w-4 inline" /> Config Changes (24h)