Account · Sign in: log in, sign up, providers, a link by email, a second factor

LoginForm takes an email and a password, keeps one signed in on a box,
and signs in on Enter once the address reads and a password is typed;
a failed try says why above Sign in. SignupForm ticks a new password's
rules as they hold and waits for all of them and the terms.
OAuthButtons offer each provider, one spinning while the rest rest.
MagicLinkForm and ForgotPassword send a link to an address and, once
sent, say where it went and offer it again. TwoFactorInput takes a
six-digit code at once and, after one fails, clears the boxes through
forms::PinInput's new attempt, keeping its focus. The Account chapter
splits into sign-in, profile and access, and billing and team.

tasks/ch31-43.md

@@ -168,14 +168,17 @@
 - [x] AdvancedSettings / FeatureFlags
 - [x] DeveloperMode Toggle
 
-## T36 Account — `src/account`
+## T36a Account · Sign in — `src/account`
+
+- [x] LoginForm
+- [x] SignupForm
+- [x] OAuthButtons
+- [x] MagicLinkForm
+- [x] TwoFactorInput
+- [x] ForgotPassword
+
+## T36b Account · Profile and access
 
-- [ ] LoginForm
-- [ ] SignupForm
-- [ ] OAuthButtons
-- [ ] MagicLinkForm
-- [ ] TwoFactorInput
-- [ ] ForgotPassword
 - [ ] ProfileCard
 - [ ] ProfileEditor
 - [ ] AccountSwitcher
@@ -183,6 +186,9 @@
 - [ ] UserMenu
 - [ ] SessionList
 - [ ] ApiKeyManager
+
+## T36c Account · Billing and team
+
 - [ ] SubscriptionCard / PlanBadge
 - [ ] UsageQuota
 - [ ] BillingHistory