Install/upgrade and UI updates: monolithic install, SnappyMail, firewall, to-do docs

- Install: monolithic install script, venvsetup_modules and venvsetup_monolithic,
  install_modules (parse_main, menus, actions, etc.), remove legacy email-configs
  and php-configs from repo, add install/snappymail and Rainloop->SnappyMail
  migration script
- CyberPanel: urls.py, cyberpanel.sh, cyberpanel_upgrade_monolithic.sh tweaks
- Firewall: firewall.js and firewall.html updates
- plogical: mailUtilities.py, upgrade.py; upgrade_modules 10_post_tweak.sh
- pluginHolder: deploy-plugins-template.sh
- to-do: docs (git conflicts, HTTP 500 recovery, phpMyAdmin, plugins, SnappyMail
  rename, install/upgrade OS support, security whitelist, etc.)
- upgrade_modules: 02_checks_part1/part2.txt

pluginHolder/deploy-plugins-template.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# Deploy the latest pluginHolder plugins.html template to CyberPanel and verify.
+# Run on the server where CyberPanel is installed.
+# From repo root: bash pluginHolder/deploy-plugins-template.sh
+# Or from anywhere: REPO_ROOT=/path/to/cyberpanel-repo bash /path/to/deploy-plugins-template.sh
+
+set -e
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="${REPO_ROOT:-$(cd "$SCRIPT_DIR/.." && pwd)}"
+TEMPLATE_SRC="${REPO_ROOT}/pluginHolder/templates/pluginHolder/plugins.html"
+TEMPLATE_DEST="/usr/local/CyberCP/pluginHolder/templates/pluginHolder/plugins.html"
+MARKER="installedFilterBtnAll"  # Present only in latest template (Show: All | Installed only | Active only)
+
+if [ ! -f "$TEMPLATE_SRC" ]; then
+    echo "Error: Template not found at $TEMPLATE_SRC"
+    echo "Set REPO_ROOT to the path of your cyberpanel repo."
+    exit 1
+fi
+
+echo "Source: $TEMPLATE_SRC"
+echo "Dest:   $TEMPLATE_DEST"
+
+if grep -q "$MARKER" "$TEMPLATE_SRC"; then
+    echo "Source template is the latest (contains Show/Installed only/Active only)."
+else
+    echo "Warning: Source template does not contain expected marker. Deploy anyway? (y/N)"
+    read -r ans
+    if [ "$ans" != "y" ] && [ "$ans" != "Y" ]; then
+        exit 1
+    fi
+fi
+
+if [ -f "$TEMPLATE_DEST" ]; then
+    cp -a "$TEMPLATE_DEST" "${TEMPLATE_DEST}.bak.$(date +%Y%m%d%H%M%S)"
+    echo "Backed up existing template."
+fi
+
+mkdir -p "$(dirname "$TEMPLATE_DEST")"
+cp -a "$TEMPLATE_SRC" "$TEMPLATE_DEST"
+echo "Copied template to $TEMPLATE_DEST"
+
+if command -v systemctl >/dev/null 2>&1 && systemctl is-active --quiet lscpd 2>/dev/null; then
+    echo "Restarting lscpd..."
+    systemctl restart lscpd
+    echo "lscpd restarted."
+else
+    echo "Please restart your panel (e.g. systemctl restart lscpd)."
+fi
+
+if grep -q "$MARKER" "$TEMPLATE_DEST"; then
+    echo "OK: Deployed template is latest. Verify: https://YOUR-PANEL:2087/plugins/installed#grid"
+else
+    echo "Warning: Deployed file missing expected marker."
+    exit 1
+fi