Clean up old engine images on every update, not just engine upgrades (#45)

Image cleanup previously only ran when the engine version changed.
Users who already had v3.3.32 but accumulated old images from prior
upgrades wouldn't see cleanup until the next engine bump. Now runs
after every update check regardless of whether the engine changed.

Author: SamNet-dev

mtproxymax.sh

@@ -3318,22 +3318,22 @@ self_update() {
             load_secrets
             restart_proxy_container
         fi
-        # Clean up old engine images (keep only the current version + latest)
-        local _old_img
-        while IFS= read -r _old_img; do
-            [ -z "$_old_img" ] && continue
-            [[ "$_old_img" == *":${_expected_ver}" ]] && continue
-            [[ "$_old_img" == *":latest" ]] && continue
-            docker rmi "$_old_img" 2>/dev/null && log_info "Removed old image: ${_old_img}"
-        done <<< "$(docker images --format '{{.Repository}}:{{.Tag}}' 2>/dev/null | grep "^${DOCKER_IMAGE_BASE}:")"
-        # Also clean registry-prefixed copies
-        while IFS= read -r _old_img; do
-            [ -z "$_old_img" ] && continue
-            [[ "$_old_img" == *":${_expected_ver}" ]] && continue
-            [[ "$_old_img" == *":latest" ]] && continue
-            docker rmi "$_old_img" 2>/dev/null || true
-        done <<< "$(docker images --format '{{.Repository}}:{{.Tag}}' 2>/dev/null | grep "^${REGISTRY_IMAGE}:")"
     fi
+
+    # Clean up old engine images (keep only the current version + latest)
+    local _old_img
+    while IFS= read -r _old_img; do
+        [ -z "$_old_img" ] && continue
+        [[ "$_old_img" == *":${_expected_ver}" ]] && continue
+        [[ "$_old_img" == *":latest" ]] && continue
+        docker rmi "$_old_img" 2>/dev/null && log_info "Removed old image: ${_old_img}"
+    done <<< "$(docker images --format '{{.Repository}}:{{.Tag}}' 2>/dev/null | grep "^${DOCKER_IMAGE_BASE}:")"
+    while IFS= read -r _old_img; do
+        [ -z "$_old_img" ] && continue
+        [[ "$_old_img" == *":${_expected_ver}" ]] && continue
+        [[ "$_old_img" == *":latest" ]] && continue
+        docker rmi "$_old_img" 2>/dev/null || true
+    done <<< "$(docker images --format '{{.Repository}}:{{.Tag}}' 2>/dev/null | grep "^${REGISTRY_IMAGE}:")"
 }
 
 # ── Section 14: Telegram Integration ────────────────────────