Improves Surface driver matching via System SKU

Adds best-effort Surface System SKU resolution and persists it into driver mappings to reduce model-name ambiguity during deployment.

Speeds up Microsoft model discovery by using a local cache and updates cached Download Center details during driver downloads to keep the UI responsive.

Prefers System SKU-based rule selection for Microsoft devices, falling back to legacy model-string matching when SKU data is unavailable.

FFUDevelopment/FFUUI.Core/FFUUI.Core.Drivers.Microsoft.psm1

@@ -10,12 +10,33 @@ function Get-MicrosoftDriversModelList {
     [CmdletBinding()]
     param(
         [hashtable]$Headers, # Pass necessary headers
-        [string]$UserAgent # Pass UserAgent
+        [string]$UserAgent, # Pass UserAgent
+        [Parameter(Mandatory = $true)]
+        [string]$DriversFolder
     )
 
     $url = "https://support.microsoft.com/en-us/surface/download-drivers-and-firmware-for-surface-09bb2e09-2a4b-cb69-0951-078a7739e120"
     $models = @()
 
+    # Load cached model list first (Source B) to keep the UI fast.
+    # The cache is refreshed automatically when missing or invalid.
+    try {
+        $cachePath = Get-SurfaceDriverIndexCachePath -DriversFolder $DriversFolder
+        if (Test-Path -Path $cachePath -PathType Leaf) {
+            $cacheAgeDays = ((Get-Date) - (Get-Item -Path $cachePath).LastWriteTime).TotalDays
+            if ($cacheAgeDays -lt 7) {
+                $cache = Import-SurfaceDriverIndexCache -DriversFolder $DriversFolder
+                if ($cache.ModelIndex -and $cache.ModelIndex.Count -gt 0) {
+                    WriteLog "Surface cache: Using cached Microsoft model list ($($cache.ModelIndex.Count) models)."
+                    return @($cache.ModelIndex)
+                }
+            }
+        }
+    }
+    catch {
+        WriteLog "Surface cache: Failed to load cached Microsoft model list. Falling back to online parse. Error: $($_.Exception.Message)"
+    }
+
     try {
         WriteLog "Getting Surface driver information from $url"
         $OriginalVerbosePreference = $VerbosePreference
@@ -70,6 +91,18 @@ function Get-MicrosoftDriversModelList {
             }
         }
         WriteLog "Parsing complete. Found $($models.Count) models."
+
+        # Persist model list (Source B) into the local cache for fast UI population.
+        try {
+            $cache = Import-SurfaceDriverIndexCache -DriversFolder $DriversFolder
+            $cache.ModelIndex = @($models)
+            Save-SurfaceDriverIndexCache -Cache $cache -DriversFolder $DriversFolder
+            WriteLog "Surface cache: Saved Microsoft model list to cache."
+        }
+        catch {
+            WriteLog "Surface cache: Failed to save Microsoft model list. Error: $($_.Exception.Message)"
+        }
+
         return $models
     }
     catch {
@@ -195,6 +228,40 @@ function Save-MicrosoftDriversTask {
                 }
             }
 
+            # Update local cache with Download Center file details (Source C) for this model.
+            # This runs during download (not during Get Models) so it won't slow the listview population.
+            try {
+                $filesForCache = [System.Collections.Generic.List[pscustomobject]]::new()
+                if ($win10Link -and $win10FileName) {
+                    $filesForCache.Add([pscustomobject]@{ Name = $win10FileName; Url = $win10Link })
+                }
+                if ($win11Link -and $win11FileName) {
+                    $filesForCache.Add([pscustomobject]@{ Name = $win11FileName; Url = $win11Link })
+                }
+
+                if ($filesForCache.Count -gt 0) {
+                    $cache = Import-SurfaceDriverIndexCache -DriversFolder $DriversFolder
+                    $detailsEntry = [pscustomobject][ordered]@{
+                        Model = $modelName
+                        Link  = $modelLink
+                        Files = @($filesForCache)
+                    }
+
+                    $newDetails = [System.Collections.Generic.List[pscustomobject]]::new()
+                    foreach ($item in @($cache.DownloadCenterDetails)) {
+                        if ($null -ne $item -and $item.PSObject.Properties['Link'] -and $item.Link -ne $modelLink) {
+                            $newDetails.Add($item)
+                        }
+                    }
+                    $newDetails.Add($detailsEntry)
+                    $cache.DownloadCenterDetails = @($newDetails)
+                    Save-SurfaceDriverIndexCache -Cache $cache -DriversFolder $DriversFolder
+                }
+            }
+            catch {
+                WriteLog "Surface cache: Failed updating Download Center details cache for '$modelName'. Error: $($_.Exception.Message)"
+            }
+
             # Decision logic to select the appropriate download link
             $downloadLink = $null
             $fileName = $null