Summary

• fetch pasted avatar URLs in the Desktop client and upload the bytes as relay media before saving
• render avatars only when they are inline previews/data URLs or current-relay media URLs
• update profile, onboarding, and agent avatar URL flows plus e2e mocks/tests for the import-then-save behavior

Testing

• pnpm --dir desktop test
• pnpm --dir desktop exec tsc --noEmit
• pnpm --dir desktop exec biome check src/shared/lib/avatarUrl.ts src/shared/lib/avatarUrl.test.mjs src/features/profile/avatarUrlImport.ts src/features/profile/avatarUrlImport.test.mjs src/features/profile/useAvatarUpload.ts src/features/profile/ui/ProfileAvatar.tsx src/features/profile/ui/ProfileAvatarEditor.tsx src/features/profile/ui/AvatarUpload.tsx src/shared/ui/UserAvatar.tsx src/features/agents/ui/AgentCreationPreview.tsx src/testing/e2eBridge.ts tests/e2e/profile.spec.ts tests/e2e/messaging.spec.ts tests/e2e/onboarding.spec.ts tests/e2e/onboarding-avatar-skip.spec.ts tests/e2e/onboarding-docked-cta-screenshots.spec.ts
• pnpm --dir desktop build:e2e
• pnpm --dir desktop exec playwright test tests/e2e/profile.spec.ts -g "updates the relay-backed profile from settings|uploads local profile avatar files before saving|reveals emoji background colors" --workers=1