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/css/varaverk.css

@@ -3,11 +3,26 @@
 #varaverk-wrap { padding: 10px; font-family: inherit; }
 
 /* Tab bar */
-#vv-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 2px solid #444; }
+#vv-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 2px solid #444; align-items: flex-end; }
 .vv-tab  { padding: 6px 16px; text-decoration: none; color: #aaa; border-radius: 4px 4px 0 0; }
 .vv-tab:hover { color: #fff; background: #333; }
 .vv-tab.active { color: #fff; background: #555; border-bottom: 2px solid #fff; }
 
+/* Expand toggle button */
+#vv-expand-btn {
+  background: none; border: none; cursor: pointer;
+  color: #333; font-size: 15px; padding: 2px 8px 4px;
+  line-height: 1; border-radius: 3px; transition: color .15s;
+  margin-left: 6px; flex-shrink: 0;
+}
+#vv-expand-btn:hover { color: #888; }
+#vv-expand-btn.active { color: #aaa; }
+
+/* Fullscreen mode — hide Unraid chrome, reclaim the space */
+body.vv-fullscreen #header  { display: none !important; }
+body.vv-fullscreen #menu    { display: none !important; }
+body.vv-fullscreen #displaybox { padding-left: 1rem !important; padding-top: .5rem !important; }
+
 /* Cards / layout */
 .vv-row  { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
 .vv-card { flex: 1; min-width: 200px; background: #1e1e1e; border: 1px solid #444;