T05: fish search path, PowerShell policy and load failure, encoded OSC 7 paths, kept exit status, install read errors

assets/shell-integration/pwsh/elyterminal.ps1

@@ -1,13 +1,15 @@
 # ELYTerminal: wrap the prompt to report folder and title.
 $global:ElyPrompt = $function:prompt
 function global:prompt {
+    $text = & $global:ElyPrompt
     $folder = $executionContext.SessionState.Path.CurrentLocation
     if ($folder.Provider.Name -eq 'FileSystem') {
-        $path = $folder.ProviderPath.Replace('\', '/').Replace('%', '%25')
+        $parts = $folder.ProviderPath.Replace('\', '/') -split '/'
+        $path = ($parts | ForEach-Object { [Uri]::EscapeDataString($_) }) -join '/'
         if (-not $path.StartsWith('/')) { $path = "/$path" }
-        $leaf = Split-Path -Leaf $folder.ProviderPath
+        $leaf = (Split-Path -Leaf $folder.ProviderPath) -replace '\p{Cc}', ''
         $esc, $bel = [char]27, [char]7
         [Console]::Write("$esc]7;file://$path$bel$esc]2;$leaf$bel")
     }
-    & $global:ElyPrompt
+    $text
 }