release: 4.5.10 clip hardening, VOD filter, editor proc decoupling

- download-clip: sanitize broadcaster name + title, ensure unique
  filename, post-download size + integrity check, track in
  activeClipProcesses so window-close cleans up
- VOD list: persistent filter input with Ctrl+F focus, Esc clear,
  match counter (DE + EN strings)
- currentProcess split into currentEditorProcess (cutter/merger/
  splitter only) so cancel-download no longer accidentally kills a
  separate video cut

See docs/IMPROVEMENT_LOG.md (Cycle 3, 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": "4.5.9",
+  "version": "4.5.10",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "twitch-vod-manager",
-      "version": "4.5.9",
+      "version": "4.5.10",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.6.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "twitch-vod-manager",
-  "version": "4.5.9",
+  "version": "4.5.10",
   "description": "Twitch VOD Manager - Download Twitch VODs easily",
   "main": "dist/main.js",
   "author": "xRangerDE",