password-reset: a confirmed e-mail, then a link to reset the password

Agreed by the owner on 2026-10-13 ("the e-mail must be confirmed");
notifications to an unconfirmed address settled on 2026-10-17: "Без
подтверждения слать". Mockups 2f5f5b2, route guard b7bbb2c, panel guard
0774da2.

Migration 0013: users.email_confirmed_at ('' for every address saved
before it) and user_links - the SHA-256 of a link's token, its user,
purpose (confirm, reset), address, created and expiry. A changed address
loses its mark (keepConfirmed, in UpdateUser and SaveUser).

internal/web/auth/links.go. A link is 256 bits from crypto/rand, mailed as
https://SELFPOST_HOSTNAME/... - never the request's Host. Confirmation:
24 h, sent when an address is saved (Account, or the global role's user
form) and by Account's Send the link again; its page /confirm/<token> has
a button (a GET changes nothing) and confirms only for a session of its
own account. Reset: /login/reset asks for a username and answers the same
for every name (the sign-in page, "If that account has a confirmed e-mail,
the link is on its way"), mailing after the answer; only a confirmed
address gets one, none within ten minutes of the last, five links an hour
per account, five requests in 15 minutes per client address;
/login/reset/<token> (30 min) sets the password with the link taken in
the same transaction that checks the address again
(store.TakeResetLink), then ends every session. Changing the e-mail on
Account asks for the current password. A password set on Account or the
user form removes the reset links; a restore removes every link; the stop
waits for links being mailed (Server.Drain); a rejected request's log line
hides a link's token (loggedPath).

Reviewed for security before the commit (2026-10-17): no high; two
medium and five low, all fixed here - confirming needs the account's
session and the mail does not name the account (a mistyped address was a
takeover); a reset request neither replaces the links already sent nor
spends the account's quota inside ten minutes; take-and-set atomic; the
confirmation mail sent after the answer; the stop waits for mail; a
restore deletes the links; the token kept out of the log.

Tests: store TestUserLinks, TestUserLinkTakenOnce, TestEmailConfirmation,
TestTakeResetLink; auth TestResetSendsALinkOnlyToAConfirmedAddress,
TestResetLinkSetsThePasswordOnce, TestResetLinkDiesWithTheAddress,
TestResetRequestsAreLimited, TestResetRequestsAreSpaced, TestConfirmLink,
TestLinkPathsWithoutAToken; handlers TestAccountEmailIsConfirmedByItsLink,
TestUserFormSendsANewAddressItsLink; web TestLoggedPathHidesTokens; the
view's pages and fixtures; e2e password_reset_by_e_mail runs it through
the sink (and checks a link from before the restore is dead). go vet +
go test (26 packages) and make e2e on the test server for this tree.

Docs: guide § Account, security.md (the bullet and what ends sessions),
architecture (routes), schema-migrations (row 13, users, user_links),
help #account (word for word with the mockup), roadmap row done,
CHANGELOG [Unreleased].

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/view/account.go

@@ -27,10 +27,41 @@ type Account struct {
 	// Notify is whether the panel writes to this user: the checkbox under the
 	// e-mail.
 	Notify bool
+	// EmailTag says whether the stored address is confirmed (nil without
+	// one); Resend is the form that sends its link again, nil once it is
+	// confirmed (password-reset).
+	EmailTag *Tag
+	Resend   *ResendLink
 
 	Password Box
 }
 
+// ResendLink is Account's "Send the link again": the address and when its
+// live link went ("" for none).
+type ResendLink struct {
+	Email string
+	Sent  string
+}
+
+// WithEmailState sets the stored address's tag and, while it is not
+// confirmed, the resend form: sentAt is when its live link went, zero for
+// none.
+func (a *Account) WithEmailState(email string, confirmed bool, sentAt time.Time) *Account {
+	if email == "" {
+		return a
+	}
+	if confirmed {
+		a.EmailTag = &Tag{Status: "ok", Label: "confirmed"}
+		return a
+	}
+	a.EmailTag = &Tag{Status: "warn", Label: "not confirmed"}
+	a.Resend = &ResendLink{Email: email}
+	if !sentAt.IsZero() {
+		a.Resend.Sent = sentAt.Local().Format("15:04")
+	}
+	return a
+}
+
 // NewAccount builds the page for a user. role is "global" or "domain" and
 // appears in the kicker.
 func NewAccount(m Meta, role string) *Account {