release: 4.5.11 GQL retry, VOD sort, shutdown consolidation

- public-API fallback retries on transient HTTP/network errors so a
  single TCP RST does not produce an empty VOD list
- new VOD list sort dropdown with persisted key (newest, oldest,
  most viewed, longest, shortest)
- shutdownCleanup() consolidates window-all-closed and before-quit
  into one idempotent helper so future exit-time cleanup lands once

See docs/IMPROVEMENT_LOG.md (Cycle 4, 2026-05-03) for the dated
rationale and regression run.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "twitch-vod-manager",
-  "version": "4.5.10",
+  "version": "4.5.11",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "twitch-vod-manager",
-      "version": "4.5.10",
+      "version": "4.5.11",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.6.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "twitch-vod-manager",
-  "version": "4.5.10",
+  "version": "4.5.11",
   "description": "Twitch VOD Manager - Download Twitch VODs easily",
   "main": "dist/main.js",
   "author": "xRangerDE",