[FIX] Shelfmark: internal bypasser never starts under the gevent worker (#16495)

* Shelfmark: fix internal bypasser under the gevent worker

The internal captcha bypasser never worked on this install. Shelfmark is served
by gunicorn's GeventWebSocketWorker, and DOCKERMODE controls whether the bypass
browser runs in a helper process "isolated from gunicorn/gevent" (upstream's
_get_via_subprocess). With DOCKERMODE=false the SeleniumBase CDP browser starts
inside the monkey-patched loop, its asyncio websocket never connects, and every
bypass dies at "Pure CDP browser startup timed out after 45s" — searches then
burn their whole retry budget and surface as "mirrors are blocked".

Set DOCKERMODE=true for deployment type 1, and migrate existing installs on
update. The flag is misnamed upstream: it gates gevent isolation, not Docker.

Also drop chromium.service. Nothing in Shelfmark connects to port 9222 — the
bypasser launches its own browser on a random port — so it only consumed
~226MB. With DOCKERMODE enabled it is additionally killed by Shelfmark's
orphan-process reaper (pkill -f chromium) on every bypass and respawned by
systemd, since an LXC shares its PID namespace.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Ln3yVj3sWHG2c6T78W1we

* Shelfmark: address review — one check, drop comments

Collapse the chromium.service removal and the DOCKERMODE migration into the
single internal-bypasser check, as every affected install has both. Guard the
disable so a second update run does not fail on the removed unit, matching
esphome.sh. Drop the explanatory comments.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Ln3yVj3sWHG2c6T78W1we

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

ct/shelfmark.sh

@@ -36,9 +36,18 @@ function update_script() {
   if check_for_gh_release "shelfmark" "calibrain/shelfmark"; then
     msg_info "Stopping Service(s)"
     systemctl stop shelfmark
-    [[ -f /etc/systemd/system/chromium.service ]] && systemctl stop chromium
     msg_ok "Stopped Service(s)"
 
+    if [[ $(sed -n '/_BYPASS=/s/[^=]*=//p' /etc/shelfmark/.env) == "true" ]] &&
+      [[ $(sed -n '/BYPASSER=/s/[^=]*=//p' /etc/shelfmark/.env) == "false" ]]; then
+      msg_info "Updating internal bypasser configuration"
+      systemctl disable -q --now chromium 2>/dev/null || true
+      rm -f /etc/systemd/system/chromium.service
+      systemctl daemon-reload
+      sed -i '/DOCKERMODE=/s/false/true/' /etc/shelfmark/.env
+      msg_ok "Updated internal bypasser configuration"
+    fi
+
     [[ -f /etc/systemd/system/flaresolverr.service ]] && if check_for_gh_release "flaresolverr" "Flaresolverr/Flaresolverr"; then
       msg_info "Stopping FlareSolverr service"
       systemctl stop flaresolverr
@@ -79,7 +88,6 @@ function update_script() {
 
     msg_info "Starting Service(s)"
     systemctl start shelfmark
-    [[ -f /etc/systemd/system/chromium.service ]] && systemctl start chromium
     msg_ok "Started Service(s)"
     msg_ok "Updated successfully!"
   fi

install/shelfmark-install.sh

@@ -116,6 +116,7 @@ else
     chromium-common \
     chromium \
     python3-tk
+  sed -i '/DOCKERMODE=/s/false/true/' /etc/shelfmark/.env
   msg_ok "Installed internal bypasser dependencies"
 fi
 
@@ -165,22 +166,6 @@ KillMode=mixed
 WantedBy=multi-user.target
 EOF
 
-if [[ "$DEPLOYMENT_TYPE" == "1" ]]; then
-  cat <<EOF >/etc/systemd/system/chromium.service
-[Unit]
-Description=Chromium Headless Browser
-After=network.target
-
-[Service]
-User=root
-ExecStart=/usr/bin/chromium --headless --no-sandbox --disable-gpu --disable-dev-shm-usage --remote-debugging-address=127.0.0.1 --remote-debugging-port=9222 --hide-scrollbars
-Restart=always
-
-[Install]
-WantedBy=multi-user.target
-EOF
-  systemctl enable -q --now chromium
-fi
 if [[ "$DEPLOYMENT_TYPE" == "2" ]]; then
   cat <<EOF >/etc/systemd/system/flaresolverr.service
 [Unit]