Auth stack certs tab, arrs db fallbacks, cert monitor cache, conf parser fix

- Auth stack: fold cert monitor into Auth Stack page as fourth tab (Certs);
  remove standalone cert page and top-level tab
- cert_monitor.sh: write JSON status cache to State_Files/cert_status.json
  after each run; expose per-domain days/expiry via _CERT_DAYS/_CERT_EXPIRY globals
- api/cert.php: new — serves cached cert status; falls back to configured
  domains as UNKN when no cache exists; POST action=run triggers live check
- arrs db fallbacks: vv_arr_cleanup_stats/discovery_stats/recovery_stats now
  read from data/*.db files when log JSON files don't yet exist
- config.php vv_conf_vars(): unescape bash \$ → $ so passwords with dollar
  signs read correctly from conf files
- host1.conf: fill in HOST1_NPM_USER/PASS and HOST1_LLDAP_USER/PASS
- Partnership adapter pattern: Unraid-specific container logic extracted to
  Plugin/unraid/Partnership/; platform-agnostic structure stays in Partnership/
- First-run wizard: uniform multi-step flow for all hosts; HOST2 pull moved
  to checklist; auto SSH keygen and API key creation on save
- api/checklist.php: live setup checklist with pull_master action
- Fullscreen toggle: hide Unraid header/menu; state persists via localStorage

Plugin/unraid/Varaverk.page

@@ -40,12 +40,15 @@ $tabLabels = ['monitor' => 'Monitor', 'scheduler' => 'Scheduler', 'docker' => 'D
         <?= $tabLabels[$t] ?? ucfirst($t) ?>
       </a>
     <?php endforeach; ?>
-    <a href="https://github.com/FailedProxy/Varaverk" target="_blank"
-       style="margin-left:auto;padding:0 10px;font-size:10px;color:#333;text-decoration:none;
-              display:flex;align-items:center;letter-spacing:.03em;"
-       title="GitHub — source, issues, changelog">
-      ⎋ GitHub
-    </a>
+    <div style="margin-left:auto;display:flex;align-items:center;gap:2px;">
+      <a href="https://github.com/FailedProxy/Varaverk" target="_blank"
+         style="padding:0 10px;font-size:10px;color:#333;text-decoration:none;
+                display:flex;align-items:center;letter-spacing:.03em;"
+         title="GitHub — source, issues, changelog">
+        ⎋ GitHub
+      </a>
+      <button id="vv-expand-btn" onclick="vvToggleExpand()" title="Expand">⤢</button>
+    </div>
   </div>
 
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