Run mklink through cmd so windows postinstall works (#7982)

npm install fails on Windows in postinstall with "mklink: command not
found". mklink is a cmd.exe builtin rather than an executable, so the sh
running this script cannot exec it, and every symlink the install needs is
made this way.

The doubled slashes are the usual MSYS escaping, and are safe here because
this branch only runs when the OS was detected as cygwin or mingw.

CHANGELOG.md

@@ -22,6 +22,8 @@ Code v99.99.999
 
 ## Unreleased
 
+## [4.135.0](https://github.com/coder/code-server/releases/tag/v4.135.0) - 2026-08-27
+
 Code v1.135.0
 
 ### Changed

ci/build/npm-postinstall.sh

@@ -18,7 +18,7 @@ symlink() {
   dest="$2"
   rm -rf "$dest"
   case $OS in
-    windows) mklink /J "$dest" "$source" ;;
+    windows) cmd //c mklink //J "$dest" "$source" ;;
     *) ln -s "$source" "$dest" ;;
   esac
 }
@@ -67,7 +67,7 @@ main() {
 
   if [ "$major_node_version" -ne "${FORCE_NODE_VERSION:-24}" ]; then
     echo "ERROR: code-server currently requires node v24."
-    if [ -n "$FORCE_NODE_VERSION" ]; then
+    if [ -n "${FORCE_NODE_VERSION:-}" ]; then
       echo "However, you have overrided the version check to use v$FORCE_NODE_VERSION."
     fi
     echo "We have detected that you are on node v$major_node_version"

ci/helm-chart/Chart.yaml

@@ -15,9 +15,9 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 3.49.0
+version: 3.50.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-appVersion: 4.134.0
+appVersion: 4.135.0

ci/helm-chart/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repository: codercom/code-server
-  tag: '4.134.0'
+  tag: '4.135.0'
   pullPolicy: Always
 
 # Specifies one or more secrets to be used when pulling images from a