Merge claude/2

Was: 'What's saved. Save System config first — if anything breaks, you
     need it to get everything else back.' — read a bit kindergarten.

Now: 'Latest backup per app + System config. Back up System first —
     it's needed to restore the rest.' — same info, tighter, still
     reads at a glance.
Signed-off-by: librelad <librelad@digitalangels.vip>

containers/libreportal/frontend/html/backup-content.html

@@ -83,7 +83,7 @@
             <div class="backup-cards-row">
               <div class="backup-card">
                 <div class="backup-card-header">
-                  <h2>Backup status <span class="tooltip" title="What's saved. Save System config first — if anything breaks, you need it to get everything else back." style="font-size:.75em;opacity:.7;cursor:help">ℹ️</span></h2>
+                  <h2>Backup status <span class="tooltip" title="Latest backup per app + System config. Back up System first — it's needed to restore the rest." style="font-size:.75em;opacity:.7;cursor:help">ℹ️</span></h2>
                 </div>
                 <!-- The "System config" tile is rendered FIRST inside this grid
                      by renderDashboard() / renderSystemTile(), styled the same