I ran the reported 0.1.3-nightly.20261025.3669 AppImage (extracted, via AppRun) on Linux x86_64 under X11/Xvfb with an unlocked libsecret store and --no-sandbox --disable-gpu. It reached backend ready and main window created with both fresh state and a v0.1.2-created database seeded with 10 projects and 100 stopped threads. A desktop build of current main (f88b33a16d) also opened with both fixtures. No backend restart loop appeared during these startup checks. This does not cover Arch/KDE's kwallet6 setup.
The supplied log shows the backend exit code but not its cause. Please include the error entries from ~/.t3/userdata/logs/server.trace.ndjson around the first failed startup, plus any backend stdout/stderr entries in desktop.trace.ndjson at the same time. Redact credentials and private paths. Those entries should distinguish a database migration failure from another backend startup error.
Reproduction transcript · Launch driver · Synthetic fixture seed