Fix empty latency tests and Linux startup errors (#10335)

* Fix overflow when speed tests have no eligible profiles

* Preserve core executable permissions in Debian packages

* Avoid requesting an icon refresh before view initialization

package-debian.sh

@@ -676,6 +676,15 @@ EOF
   find "$stage/opt/v2rayN" -type f -exec chmod 0644 {} +
   [[ -f "$stage/opt/v2rayN/v2rayN" ]] && chmod 0755 "$stage/opt/v2rayN/v2rayN" || true
 
+  # Core binaries must be executable before installation: ordinary users cannot
+  # chmod the root-owned files installed by dpkg.
+  local core
+  for core in xray/xray sing_box/sing-box mihomo/mihomo; do
+    if [[ -f "$stage/opt/v2rayN/bin/$core" ]]; then
+      chmod 0755 "$stage/opt/v2rayN/bin/$core"
+    fi
+  done
+
   deb_out="$OUTPUT_DIR/v2rayn_${VERSION}_${deb_arch}.deb"
   dpkg-deb --root-owner-group --build "$stage" "$deb_out"