When this flow runs

A brand-new deployment shows a non-dismissible modal asking the operator to create the very first admin user. This is gated by the initialized flag returned from GET /api/v1/bootstrap:

`initialized`	User experience
`false`	Every route is redirected to `/bootstrap` until an admin is created.
`true`	The setup route becomes a 404 and the modal can never appear again.

The authGuard enforces the redirect on the client side; the backend independently rejects /api/v1/setup/create-admin with 404 NOT_FOUND once any admin row exists, so the flow is safe even if the SPA is bypassed.

How to access (tester steps)

Start the stack against an empty database:
```
npm run db:reset && npm run dev
```
Open the browser at http://localhost:3000/.
The app redirects to /bootstrap and shows the "Welcome to HIPCTF — Create the first administrator" modal.
Fill in the three fields and submit:
- Username — 3–32 chars, letters/digits/./-/_ only. Helper text is shown via data-testid="setup-username-error" when the pattern fails.
- Password — must satisfy the policy shown directly below the field (default: 12 chars with upper, lower, digit, symbol).
- Confirm Password — must equal the password above (verified by the group-level passwordMatchValidator; mismatch shows data-testid="setup-confirm-error").
Click Create admin (data-testid="setup-submit").

Expected behavior

On success the modal disappears, the app stores the access token via AuthService.setSession, calls BootstrapService.markInitialized(), and navigates to /admin (see Admin Shell & User Management).
On USERNAME_TAKEN the form shows a red alert: "Username already exists". The Retry button is intentionally hidden because the username must be changed first.
On any other failure (network, WEAK_PASSWORD, VALIDATION_FAILED, RATE_LIMITED) the alert shows "Setup failed, please retry" and a Retry link (data-testid="setup-retry") re-submits the same payload.

The modal cannot be dismissed by the user:

Clicking the backdrop is a no-op (swallowBackdrop).
Pressing Esc is swallowed by the keydown.escape host listener.

Visual elements

Element	Selector	Purpose
Modal overlay	`.overlay`	Full-screen backdrop.
Modal card	`.modal[role="dialog"]`	Contains the form; stops click propagation.
Username input	`[data-testid="setup-username"]`	Reactive control with length/pattern rules.
Password input	`[data-testid="setup-password"]`	Reactive control.
Confirm input	`[data-testid="setup-password-confirm"]`	Reactive control.
Submit button	`[data-testid="setup-submit"]`	Disabled while submitting or invalid.
Server error alert	`[data-testid="setup-server-error"]`	Displays `serverError()`.
Retry button	`[data-testid="setup-retry"]`	Re-submits; absent when the error is non-retryable.
Password policy hint	`.hint`	Live description from `BootstrapService.passwordPolicy()`.

Behind the scenes (architecture map)

Step	Where	What happens
1	`BootstrapService.load()`	Calls `GET /api/v1/bootstrap`, sets `initialized = false`.
2	`authGuard`	Sees `initialized() === false`, redirects to `/bootstrap`.
3	`SetupCreateAdminComponent`	Renders the modal; reactive form enforces username + password policy + passwordMatch.
4	`SetupCreateAdminService.ensureCsrf()`	Preflights `GET /api/v1/auth/csrf` so the response sets the `csrf` cookie.
5	`POST /api/v1/setup/create-admin`	`SetupService.createAdmin` runs in a TypeORM transaction; creates the user with `role='admin'`; mints session via `AuthService.createSession`.
6	`setRefreshCookie`	Sets the `rt` HttpOnly cookie.
7	Component on success	`AuthService.setSession`, `BootstrapService.markInitialized()`, navigate to `/admin`.
8	Subsequent `authGuard` checks	`initialized === true`; require auth instead.

What the operator sees after init

Once the first admin exists, /api/v1/bootstrap returns initialized: true. The app now:

Skips /bootstrap entirely.
Routes unauthenticated users to /login.
Routes authenticated admins to / (the Home shell) and renders the admin nav link. The first admin lands directly on the user list at /admin (see Admin Shell & User Management).
Routes authenticated players to / without the admin nav link.

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