feat: windows installer with remote updates and remote management added.

CHANGELOG.md

@@ -6,6 +6,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [1.4.0] - 2026-03-12
+
+### Added
+- `series3_tray.py` — system tray launcher using `pystray` + `Pillow`. Color-coded icon (green=OK, amber=Pending, red=Missing, purple=Error, grey=Starting). Right-click menu shows live status, unit count, last scan age, Open Log Folder, and Exit.
+- `run_watcher(state, stop_event)` in `series3_watcher.py` for background thread use by the tray. Shared `state` dict updated on every scan cycle with status, unit list, last scan time, and last error.
+- Interruptible sleep in watcher loop — tray exit is immediate, no waiting out the full scan interval.
+
+### Changed
+- `main()` now calls `run_watcher()` — standalone behavior unchanged.
+- `requirements.txt` updated to document tray dependencies (`pystray`, `Pillow`); watcher itself remains stdlib-only.
+
+---
+
 ## [1.3.0] - 2026-03-12
 
 ### Changed