fix: Correct URI construction and ensure proper function exports/imports

MainForm.ps1

@@ -5,7 +5,8 @@ Import-Module Microsoft.Graph.Files
 
 # Import our components
 . "$PSScriptRoot\GraphConfig.ps1"
-. "$PSScriptRoot\SharePointFunctions.ps1"
+$SharePointFunctions = "$PSScriptRoot\SharePointFunctions.ps1"
+Import-Module $SharePointFunctions -Force
 . "$PSScriptRoot\EventHandlers.ps1"
 
 # Create main form

SharePointFunctions.ps1

@@ -1,5 +1,18 @@
 # SharePointFunctions.ps1
 
+$script:config = $null  # Initialize config variable
+
+# Export functions that will be called from other scripts
+Export-ModuleMember -Function @(
+    'Load-Config',
+    'Save-Config',
+    'Get-FolderBrowser',
+    'Connect-SharePoint',
+    'List-XlsFiles',
+    'Convert-Files',
+    'Move-Files'
+)
+
 # Load configuration from config.json
 function Load-Config {
     try {
@@ -441,7 +454,7 @@ function Convert-Files {
                 
                 # Construct the download URI
                 $encodedPath = [System.Web.HttpUtility]::UrlEncode($relativePath).Replace("+", "%20")
-                $downloadUri = "https://graph.microsoft.com/v1.0/drives/$($drive.Id)/root:/$encodedPath:/content"
+                $downloadUri = "https://graph.microsoft.com/v1.0/drives/$($drive.Id)/root:/$($encodedPath):/content"
                 
                 # Download the file
                 Invoke-MgGraphRequest -Uri $downloadUri -Method GET -OutFile $downloadPath