release: v2.1.12 reliability and security hardening

Verify update artifacts with exact metadata and SHA-512, require host-confirmed upload completion before cleanup, harden credentials and backups, improve queue recovery and skipped-state reporting, expand Windows path coverage, and add CI packaging checks.

renderer/queue-stats.js

@@ -0,0 +1,51 @@
+(function (root, factory) {
+  const api = factory();
+  if (typeof module === 'object' && module.exports) module.exports = api;
+  if (root) root.QueueStats = api;
+})(typeof window !== 'undefined' ? window : globalThis, function () {
+  function calculateQueueStats(jobs) {
+    const items = Array.isArray(jobs) ? jobs : [];
+    let remaining = 0;
+    let inProgress = 0;
+    let done = 0;
+    let errors = 0;
+    let skipped = 0;
+    let aborted = 0;
+    let bytesRemaining = 0;
+    let totalSize = 0;
+    let remainingSize = 0;
+    let inProgressBytes = 0;
+
+    for (const job of items) {
+      const status = job?.status;
+      const totalBytes = Number(job?.bytesTotal) || 0;
+      const uploadedBytes = Number(job?.bytesUploaded) || 0;
+      const pendingBytes = Math.max(0, totalBytes - uploadedBytes);
+      totalSize += totalBytes;
+
+      if (status === 'uploading' || status === 'getting-server' || status === 'retrying') {
+        inProgress++;
+        remaining++;
+        inProgressBytes += uploadedBytes;
+        bytesRemaining += pendingBytes;
+        remainingSize += pendingBytes;
+      } else if (status === 'preview' || status === 'queued') {
+        remaining++;
+        bytesRemaining += pendingBytes;
+        remainingSize += pendingBytes;
+      } else if (status === 'done') {
+        done++;
+      } else if (status === 'error') {
+        errors++;
+      } else if (status === 'skipped') {
+        skipped++;
+      } else if (status === 'aborted') {
+        aborted++;
+      }
+    }
+
+    return { total: items.length, remaining, inProgress, done, errors, skipped, aborted, bytesRemaining, totalSize, remainingSize, inProgressBytes };
+  }
+
+  return { calculateQueueStats };
+});