refactor(gluetun): collapse to one function name for the refresh hook

Drop the appWebuiRefresh_gluetun -> webuiGenerateGluetunProviders wrapper; rename
the function itself to appWebuiRefresh_gluetun and point the installer + the
gluetun_refresh_providers tool at it. One name, no indirection.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>

containers/gluetun/gluetun.sh

@@ -96,7 +96,7 @@ installGluetun()
         echo "---- $menu_number. Refreshing Gluetun provider snapshot."
         echo ""
 
-        webuiGenerateGluetunProviders;
+        appWebuiRefresh_gluetun;
 
         ((menu_number++))
         echo ""

containers/gluetun/scripts/gluetun_providers.sh

@@ -1,11 +1,15 @@
 #!/bin/bash
 
+# Per-app routine WebUI-refresh hook (appWebuiRefresh_<app>): webui_updater calls
+# it on every WebUI update while gluetun is installed; the installer (gluetun.sh)
+# and the 'gluetun_refresh_providers' tool call it directly too.
+#
 # Fetches gluetun's upstream servers.json, slims it down to a
 # { providers: { <name>: { vpnTypes, countries } } } shape, and writes it
 # to the WebUI data dir so the per-app config dropdowns stay honest as
 # gluetun adds/removes providers and protocols. Falls back silently to the
 # previous snapshot (or the bundled default) on network failure.
-webuiGenerateGluetunProviders() {
+appWebuiRefresh_gluetun() {
     local output_file="${containers_dir}libreportal/frontend/data/apps/generated/gluetun-providers.json"
     local upstream="https://raw.githubusercontent.com/qdm12/gluetun/master/internal/storage/servers.json"
     local tmp="$(mktemp)"
@@ -78,11 +82,3 @@ webuiGenerateGluetunProviders() {
         isNotice "Empty gluetun snapshot generated; ignoring."
     fi
 }
-
-# Routine WebUI-update hook (appWebuiRefresh_<app>): keep the provider snapshot
-# fresh on every WebUI update while gluetun is installed. The installer
-# (gluetun.sh) refreshes on first install and the 'gluetun_refresh_providers'
-# tool refreshes on demand; this covers the in-between drift.
-appWebuiRefresh_gluetun() {
-    webuiGenerateGluetunProviders
-}

containers/gluetun/tools/gluetun_refresh_providers.sh

@@ -11,6 +11,6 @@ appGluetunRefreshProviders()
     local tool_args="$1"
 
     isNotice "Refreshing Gluetun provider snapshot..."
-    webuiGenerateGluetunProviders
+    appWebuiRefresh_gluetun
     isSuccessful "Provider snapshot regenerated."
 }