Stop the media seed from holding the onboard, and therefore the partnership, open for weeks

A first seed is ~28 TB behind a 12.5 MB/s bwlimit, and it ran inline as Step 9d, so the
phase-2 flag every status reader depends on was written only after it finished.

Plugin/unraid/include/partnership.php

@@ -230,6 +230,64 @@ function vv_pt_remote_system(string $ip, string $sshKey): array {
     ];
 }
 
+// ── Media seed progress ───────────────────────────────────────────────────────
+//
+// Onboard Step 13 dispatches Rsync/media_seed.sh detached, because a first seed of a full
+// media library is a multi-week transfer and used to hold the onboard — and therefore the
+// phase-2 flag, and therefore this whole page — open for the duration.
+//
+// Detaching it means nothing on screen would mention it at all unless something reads its
+// job record, which is what this does. The seed is a push from this host to the partner, so
+// it is rendered on the partner's card even though every byte of evidence for it is local.
+//
+// Returns [] when there has never been a seed. A stale "running" record whose pid is gone is
+// reported as stopped rather than running: a record is not a process.
+function vv_pt_media_seed(): array {
+    $stat = '/var/log/varaverk/Rsync/media_seed.json';
+    $log  = '/var/log/varaverk/Rsync/media_seed.log';
+    if (!is_file($stat)) return [];
+
+    $j = json_decode((string)file_get_contents($stat), true);
+    if (!is_array($j)) return [];
+
+    $status = (string)($j['status'] ?? '');
+    $pid    = (int)($j['pid'] ?? 0);
+    if ($status === 'running' && (!$pid || !is_dir("/proc/$pid"))) {
+        $status = 'stopped';
+    }
+
+    $share = '';
+    $line  = '';
+    if (is_file($log)) {
+        // rsync --info=progress2 rewrites one line with \r, so the tail is read as bytes and
+        // split on both terminators — splitting on \n alone yields a single enormous "line"
+        // holding every progress repaint of the current file.
+        $fh = fopen($log, 'r');
+        if ($fh) {
+            fseek($fh, 0, SEEK_END);
+            $size = ftell($fh);
+            fseek($fh, max(0, $size - 65536));
+            $tail = (string)fread($fh, 65536);
+            fclose($fh);
+            $parts = preg_split('/[\r\n]+/', $tail) ?: [];
+            for ($i = count($parts) - 1; $i >= 0; $i--) {
+                $p = trim($parts[$i]);
+                if ($p === '') continue;
+                if ($line === '') $line = $p;
+                if (preg_match('/Seeding:\s*(\S+)/', $p, $m)) { $share = $m[1]; break; }
+            }
+        }
+    }
+
+    return array_filter([
+        'status' => $status,
+        'start'  => isset($j['start']) ? (int)$j['start'] : null,
+        'end'    => isset($j['end'])   ? (int)$j['end']   : null,
+        'share'  => $share,
+        'line'   => mb_substr($line, 0, 160),
+    ], fn($v) => $v !== null && $v !== '');
+}
+
 // ── Per-node data ─────────────────────────────────────────────────────────────
 
 function vv_pt_nodes(): array {
@@ -362,6 +420,7 @@ function vv_pt_nodes(): array {
             'api_key_set'     => $apiKeySet,
             'api_key_preview' => $apiKeyPreview,
             'metrics'         => $metrics,
+            'media_seed'      => $isMe ? [] : vv_pt_media_seed(),
         ];
     }
     return $nodes;