A botched edit left three overlapping fragments in `run()`, one
referencing an undefined `exe_dir`. Only the last was syntactically
balanced, so the file did not compile. Collapse to a single cwd-relative
`init_system_pool(SYSTEM_DB_PATH)` block, consistent with the rest of
the project.
- New skald-setup crate: interactive first-run wizard that creates the
admin user, prompts for encryption choice and password
- Auth system: session-based login/logout with cookie, guard middleware
- Roles API: CRUD for data-driven roles, seeded on first boot
- Users management API: create, list, edit, delete users
- Setup state API: check if first admin has been created
- Frontend: login-page, setup-page, users-page, roles-page, profile-page
components with corresponding CSS
- Topbar: avatar dropdown with profile link and logout
- Sidebar: nav entries for Users and Roles (admin only)
- Page shell CSS: layout support for the new pages
- build.sh: builds both skald and skald-setup binaries
- run.sh: runs skald-setup before the server loop
- CLAUDE.md: updated workspace layout and build/run docs