Mamba 1.4.4

Mamba 1.4.4 includes the CLI foundation, Linux AppImage and Debian packages, and improvements to refreshing, searching, artwork loading and background work.

• Cached search matches appear while Steam checks continue; stale responses are ignored.
• Artwork loads with bounded concurrency and failed lookups are cached.
• Steam account switching and play-history refresh are corrected.
• Unchanged settings skip disk writes; worker and dialog failure recovery is improved.
• Library scans avoid repeated helper rewrites and automatic Xbox registration.
• MambaCLI provides help, search, foreground downloads and a separate queue. Node.js 22+ is required; see README for terminal setup.
• MegaSource is generated from configured public inputs. Unavailable sources are explicitly reported in the JSON.

All 182 tests passed for the application release. Linux packages were built by GitHub Actions on Ubuntu; desktop runtime and real download behavior on Linux have not been manually verified. Windows-specific installers and integrations require Windows.