collab-staging: Fix markdown preview font setting fallback values (#65437)
Executive Summary
displayed when nothing is specifically selected for it. Summary Fix for issue: #65300 Fixes an issue where the there was nothing displayed when no value was selected for the markdown font family and markdown code font family settings. Current: Fix: zed_4pUgjc0FS2.mp4 Testing See video above for test. I used Windows for my testing, but it should be the same for all platforms. Self-review I've reviewed my diff for quality, security, reliability, and performance.
Client Application & User-Space Architecture
From a desktop application, client performance, and user-space engineering perspective: - **Local-First Computation:** Workloads prioritize client-side execution, eliminating mandatory surveillance telemetry. - **Cross-Platform Toolchains:** Modern GUI frameworks (Qt, GTK) ensure optimal resource utilization without memory bloat. - **Format Interoperability:** Implements open, non-proprietary file formats, protecting user data from vendor entrapment.
Impact on the Open Ecosystem
Safeguards everyday workflow productivity within a trustworthy, zero-telemetry free software ecosystem.