Handle apps without a binary name in session finder

[szwoloszyn]

Description

Currently, on Linux, if a PulseAudio/PipeWire sink input does not provide the application.process.binary property, deej ignores the stream entirely and logs a "Failed to get sink input's process name" warning.

This happened to me with application running through compatibility layer. For example, when Firefox is forced to use the ALSA backend over PipeWire (media.cubeb.backend = alsa - did it as a workaround for volume-jumping issues in Linux desktop environments), it only provides application.name.

Solution

Added a simple if statement in pkg/deej/session_finder_linux.go. If the application.process.binary property is not found (!ok), the code now attempts to fetch application.name before giving up and dropping the stream.

Impact

Streams that were previously ignored and generated warnings (e.g., ALSA plug-in [firefox-esr]) are now successfully tracked as sessions and can be mapped to sliders in config.yaml.