fix(ccs): improve environment variable handling and error resilience

- use proper .NET enum for environment variable targets

- add try-catch blocks for environment variable operations

- provide user-friendly warnings when operations fail

- fixes PATH operations in install and uninstall scripts

ccs.ps1

@@ -144,11 +144,16 @@ if ($EnvVars.PSObject.Properties.Count -gt 0) {
         $VarName = $Property.Name
         $VarValue = $Property.Value
 
-        # Save original value
+        try {
-        $OriginalEnvVars[$VarName] = [System.Environment]::GetEnvironmentVariable($VarName, 'Process')
+            # Save original value
+            $OriginalEnvVars[$VarName] = [System.Environment]::GetEnvironmentVariable($VarName, [System.EnvironmentVariableTarget]::Process)
 
-        # Set new value for this process only
+            # Set new value for this process only
-        [System.Environment]::SetEnvironmentVariable($VarName, $VarValue, 'Process')
+            [System.Environment]::SetEnvironmentVariable($VarName, $VarValue, [System.EnvironmentVariableTarget]::Process)
+        } catch {
+            Write-Host "Warning: Could not set environment variable '$VarName'" -ForegroundColor Yellow
+            Write-Host "  Error: $($_.Exception.Message)" -ForegroundColor Yellow
+        }
     }
 }
 
@@ -164,12 +169,16 @@ try {
     # Restore original environment variables
     foreach ($VarName in $OriginalEnvVars.Keys) {
         $OriginalValue = $OriginalEnvVars[$VarName]
-        if ($null -eq $OriginalValue) {
+        try {
-            # Variable didn't exist before, remove it
+            if ($null -eq $OriginalValue) {
-            [System.Environment]::SetEnvironmentVariable($VarName, $null, 'Process')
+                # Variable didn't exist before, remove it
-        } else {
+                [System.Environment]::SetEnvironmentVariable($VarName, $null, [System.EnvironmentVariableTarget]::Process)
-            # Restore original value
+            } else {
-            [System.Environment]::SetEnvironmentVariable($VarName, $OriginalValue, 'Process')
+                # Restore original value
+                [System.Environment]::SetEnvironmentVariable($VarName, $OriginalValue, [System.EnvironmentVariableTarget]::Process)
+            }
+        } catch {
+            Write-Host "Warning: Could not restore environment variable '$VarName'" -ForegroundColor Yellow
         }
     }
 }

install.ps1

@@ -235,7 +235,7 @@ Write-Host "└─"
 Write-Host ""
 
 # Check and update PATH
-$UserPath = [Environment]::GetEnvironmentVariable("Path", "User")
+$UserPath = [Environment]::GetEnvironmentVariable("Path", [System.EnvironmentVariableTarget]::User)
 if ($UserPath -notlike "*$CcsDir*") {
     Write-Host "[!]  PATH Configuration Required"
     Write-Host ""
@@ -243,7 +243,7 @@ if ($UserPath -notlike "*$CcsDir*") {
 
     try {
         $NewPath = if ($UserPath) { "$UserPath;$CcsDir" } else { $CcsDir }
-        [Environment]::SetEnvironmentVariable("Path", $NewPath, "User")
+        [Environment]::SetEnvironmentVariable("Path", $NewPath, [System.EnvironmentVariableTarget]::User)
 
         Write-Host "   [OK] PATH updated. Restart your terminal for changes to take effect."
         Write-Host ""

uninstall.ps1

@@ -20,11 +20,11 @@ if (Test-Path "$CcsDir\ccs.ps1") {
 $UninstallScript = "$CcsDir\uninstall.ps1"
 
 # Remove from PATH
-$UserPath = [Environment]::GetEnvironmentVariable("Path", "User")
+$UserPath = [Environment]::GetEnvironmentVariable("Path", [System.EnvironmentVariableTarget]::User)
 if ($UserPath -like "*$CcsDir*") {
     try {
         $NewPath = ($UserPath -split ';' | Where-Object { $_ -ne $CcsDir }) -join ';'
-        [Environment]::SetEnvironmentVariable("Path", $NewPath, "User")
+        [Environment]::SetEnvironmentVariable("Path", $NewPath, [System.EnvironmentVariableTarget]::User)
         Write-Host "[OK] Removed from PATH: $CcsDir"
         Write-Host "   Restart your terminal for changes to take effect."
     } catch {