feat: unified navigation

fix: install script copying build binary
chore: updated readme

install.sh

@@ -1,5 +1,18 @@
 #!/bin/bash
 
+set -e
+
+# Check if binary exists
+if [ ! -f "build/playback" ]; then
+    echo "Error: build/playback not found. Run 'make build' first."
+    exit 1
+fi
+
+# Install binary to /usr/local/bin
+echo "Installing binary to /usr/local/bin/playback..."
+sudo cp build/playback /usr/local/bin/playback
+sudo chmod +x /usr/local/bin/playback
+
 # Create desktop entry directory if it doesn't exist
 mkdir -p ~/.local/share/applications
 
@@ -19,5 +32,6 @@ EOF
 # Update desktop database
 update-desktop-database ~/.local/share/applications 2>/dev/null || true
 
+echo "Binary installed to /usr/local/bin/playback"
 echo "Desktop entry installed to ~/.local/share/applications/playback.desktop"
-echo "Playback is now available in your application menu"
+echo "Playback is now available in your application menu and via 'playback' command"