Release v3.0.0

- Bump version to 3.0.0 and update docs

- Fix Debian payload to include TUI and install /usr/bin/sensorpajen-tui wrapper

- Make systemd unit upgrades safer and ignore deb build artifacts

Tasks.md

@@ -1,5 +1,14 @@
 # Tasks
 
+## Release: v3.0.0 ✅ DONE (2025-12-29)
+
+**Goal**: Publish a v3 release and Debian package suitable for upgrades.
+
+### Completed:
+- ✅ Bump versions to 3.0.0 (Python + Debian changelog)
+- ✅ Ensure Debian package includes the TUI sources
+- ✅ Build `sensorpajen_3.0.0_all.deb`
+
 ## Task: TUI Enhancements (Phase 2)
 
 **Goal**: Add live data, global config, and dashboard.