Buzz Desktop v0.4.22

• Keep avatar preview visible during upload (#2237) (f609fcee0)
• fix(desktop): keep machine onboarding for unrecognized identities after reset (#2244) (fd55ab662)
• fix(managed-agents): stale harness pin shadows runtime edits; add Restart quick action (#2252) (ec0e450f1)
• fix(desktop): surface model discovery failures in agent config UI (#2246) (083f6d625)
• Hide bundled harnesses from onboarding (#2233) (50f441216)
• Restore npub copy option for private community joins (#2232) (9cd13f3d5)
• fix(desktop): align onboarding runtime auth (#2229) (c1de3e7c0)
• fix(desktop): survive degraded networks with rate-limit-aware relay client (#2197) (258cc9206)
• feat(desktop): browse immutable repository tags (#2231) (c11b7b611)
• Update built-in agent avatars (#2215) (396ce6473)
• fix(mesh): dedupe models + retry throttled startup channel discovery (#2063) (97b8b22ee)
• fix(desktop): keep project branches after reload (#2214) (001184395)
• fix(git): make project branch workflows reliable (#2213) (166f27be4)
• feat(desktop): manage project branches (#2212) (b2c38c775)
• feat(cli): manage repository protection rules (#2193) (f94324598)