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

debian/README.md

@@ -63,10 +63,10 @@ ls -lh ../sensorpajen_*.deb
 ## Build Output
 
 ```
-../sensorpajen_2.0.0-dev_all.deb     # Installable package
-../sensorpajen_2.0.0-dev_armhf.build      # Build log
-../sensorpajen_2.0.0-dev_armhf.buildinfo  # Build metadata
-../sensorpajen_2.0.0-dev_armhf.changes    # Changes file
+../sensorpajen_3.0.0_all.deb              # Installable package
+../sensorpajen_3.0.0_armhf.build          # Build log
+../sensorpajen_3.0.0_armhf.buildinfo      # Build metadata
+../sensorpajen_3.0.0_armhf.changes        # Changes file
 ```
 
 ## Package Verification
@@ -135,6 +135,16 @@ sudo systemctl status sensorpajen
 sudo journalctl -u sensorpajen -f
 ```
 
+## Running the TUI
+
+The package installs a `sensorpajen-tui` command in `/usr/bin/`.
+
+```bash
+sudo sensorpajen-tui
+```
+
+Internally this runs the application from `/opt/sensorpajen/venv/`.
+
 ## Package Structure
 
 ### Installed Files
@@ -142,6 +152,7 @@ sudo journalctl -u sensorpajen -f
 | Source | Destination |
 |--------|-------------|
 | `src/sensorpajen/*.py` | `/opt/sensorpajen/src/sensorpajen/` |
+| `src/sensorpajen/tui/*.py` | `/opt/sensorpajen/src/sensorpajen/tui/` |
 | `scripts/approve-sensors.sh` | `/opt/sensorpajen/scripts/` |
 | `pyproject.toml` | `/opt/sensorpajen/` |
 | `README.md`, `INSTALL.md`, `ROADMAP.md` | `/usr/share/doc/sensorpajen/` |