ui: show last cleanup freed amounts on transcode Ramdisk/NVMe tags

Parses the last 'Ramdisk freed' and 'SSD freed' values from the transcode
management log and displays them as small ↓XMB annotations inside each tag.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Plugin/unraid/include/common.php

@@ -715,6 +715,21 @@ function vv_transcode_sessions(): array {
     // Ramdisk disk usage
     $rd = vv_df('/mnt/ramdisk_transcodes');
 
+    // Last cleanup values from transcode management log
+    $lastRdFreed  = null;
+    $lastSsdFreed = null;
+    $logFile = '/var/log/varaverk/Orchestrators/transcode_management.log';
+    if (file_exists($logFile)) {
+        $lines = file($logFile, FILE_IGNORE_NEW_LINES) ?: [];
+        foreach (array_reverse($lines) as $line) {
+            if ($lastRdFreed === null && preg_match('/Ramdisk freed:\s*(\S+)/u', $line, $m))
+                $lastRdFreed = $m[1];
+            if ($lastSsdFreed === null && preg_match('/SSD freed:\s*(\S+)/u', $line, $m))
+                $lastSsdFreed = $m[1];
+            if ($lastRdFreed !== null && $lastSsdFreed !== null) break;
+        }
+    }
+
     return [
         'available'       => true,
         'current_target'  => $target,
@@ -726,5 +741,7 @@ function vv_transcode_sessions(): array {
         'ssd_sessions'    => $ssdSessions,
         'ramdisk'         => $rd,
         'ssd'             => $ssd,
+        'last_rd_freed'   => $lastRdFreed,
+        'last_ssd_freed'  => $lastSsdFreed,
     ];
 }