fix(script): rename the Xray binary to xray-linux-arm32 on 32-bit ARM

The panel maps GOARCH=arm to "arm32" and launches bin/xray-linux-arm32,
but install.sh/update.sh renamed the release tarball's binary
(xray-linux-armv5/v6/v7) to xray-linux-arm. On armv7 boxes every update
downloaded a fresh Xray core into a name the panel never executes, so an
old correctly-named binary kept running forever, and a brand-new install
had no launchable Xray binary at all. Rename to arm32 to match the panel
(mtg stays plain "arm", matching internal/mtproto), and drop the stale
misnamed xray-linux-arm during updates like the existing amd64 cleanup.

Closes #5788

install.sh

@@ -1493,10 +1493,12 @@ install_x-ui() {
     chmod +x x-ui
     chmod +x x-ui.sh
 
-    # Check the system's architecture and rename the file accordingly
+    # Check the system's architecture and rename the file accordingly.
+    # The panel binary maps GOARCH=arm to "arm32" (internal/xray/process.go),
+    # so the Xray binary must be named xray-linux-arm32; mtg keeps plain "arm".
     if [[ $(arch) == "armv5" || $(arch) == "armv6" || $(arch) == "armv7" ]]; then
-        mv bin/xray-linux-$(arch) bin/xray-linux-arm
-        chmod +x bin/xray-linux-arm
+        mv bin/xray-linux-$(arch) bin/xray-linux-arm32
+        chmod +x bin/xray-linux-arm32
         if [[ -f bin/mtg-linux-$(arch) ]]; then
             mv bin/mtg-linux-$(arch) bin/mtg-linux-arm
             chmod +x bin/mtg-linux-arm

update.sh

@@ -1023,6 +1023,7 @@ update_x-ui() {
         rm ${xui_folder}/x-ui.sh -f > /dev/null 2>&1
         echo -e "${green}Removing old xray version...${plain}"
         rm ${xui_folder}/bin/xray-linux-amd64 -f > /dev/null 2>&1
+        rm ${xui_folder}/bin/xray-linux-arm -f > /dev/null 2>&1
         echo -e "${green}Removing old README and LICENSE file...${plain}"
         rm ${xui_folder}/bin/README.md -f > /dev/null 2>&1
         rm ${xui_folder}/bin/LICENSE -f > /dev/null 2>&1
@@ -1044,10 +1045,12 @@ update_x-ui() {
     fi
     chmod +x x-ui > /dev/null 2>&1
 
-    # Check the system's architecture and rename the file accordingly
+    # Check the system's architecture and rename the file accordingly.
+    # The panel binary maps GOARCH=arm to "arm32" (internal/xray/process.go),
+    # so the Xray binary must be named xray-linux-arm32; mtg keeps plain "arm".
     if [[ $(arch) == "armv5" || $(arch) == "armv6" || $(arch) == "armv7" ]]; then
-        mv bin/xray-linux-$(arch) bin/xray-linux-arm > /dev/null 2>&1
-        chmod +x bin/xray-linux-arm > /dev/null 2>&1
+        mv bin/xray-linux-$(arch) bin/xray-linux-arm32 > /dev/null 2>&1
+        chmod +x bin/xray-linux-arm32 > /dev/null 2>&1
     fi
 
     chmod +x x-ui bin/xray-linux-$(arch) > /dev/null 2>&1