feat(app): a reset of the keys without the phrase, its banner, and the keys' proof key for a password that signs in (ADR 0020, D31–D35)

SimpleLogin's sheet, its password and its recovery phrase both lost:
under the lost-password step's phrase field, Lost your recovery phrase
too? says what stays and what is lost and asks for new keys
(`keys.startReset`) with the sign-in of a moment ago, which the device
then drops. The next sign-in says when while it waits, and once due
offers new keys, the sign-up's own password and phrase steps
(`keys.completeReset`), or the password, which calls it off (D31).

Every app's home shows `KeysResetBanner` where "too old" shows, and the
account section's SimpleLogin row the same words (`KeysResetNotice`),
each with Call it off, the password's proof alone
(`keys.callOffResets`, D32), and, once due on a device that holds the
keys, Finish here, which wraps the same keys anew (D33, D35). Both show
only a reset of an account that signs in with SimpleLogin alone; ADR
0017's resets show in its own section, which now shares `AlertBox` with
them.

An account whose password signs in has no Forgot your password? there,
and is asked its password and a code once while its keys lack the proof
key, at a sign-in or on adding SimpleLogin (`password.setProofKey`,
D34). `PasswordUnlock` carries the proof key, which its forgetting
leaves, and the keys' password proves for a purpose given.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

packages/halkyon_app/lib/l10n/halkyon_app_localizations_en.dart

@@ -983,6 +983,103 @@ class HalkyonAppLocalizationsEn extends HalkyonAppLocalizations {
   @override
   String get simpleLoginForgotDoesNotFit => 'The recovery phrase isn\'t right.';
 
+  @override
+  String simpleLoginResetWaiting(String date) {
+    return 'New keys were asked for: from $date, a SimpleLogin sign-in can set them up. Your password opening your keys calls it off.';
+  }
+
+  @override
+  String get simpleLoginPhraseLost => 'Lost your recovery phrase too?';
+
+  @override
+  String get simpleLoginResetTitle => 'New keys';
+
+  @override
+  String simpleLoginResetIntro(String instance) {
+    return 'Without your password or your recovery phrase, nobody can open your keys, not even $instance. New ones can be set up 72 hours from now, when you sign in with SimpleLogin again. Your handle, your profile and what you published stay; what was encrypted under your old keys is lost, unless you finish on a device still signed in, which keeps them.';
+  }
+
+  @override
+  String get simpleLoginResetIntroDevices =>
+      'Meanwhile your signed-in devices show the reset, and your password calls it off there, should someone else have asked for it.';
+
+  @override
+  String get simpleLoginResetAsk => 'Ask for new keys';
+
+  @override
+  String get simpleLoginResetAskedTitle => 'New keys asked for';
+
+  @override
+  String simpleLoginResetAskedIntro(String date) {
+    return 'From $date, sign in with SimpleLogin again to set them up. Should you find your password or your recovery phrase before then, opening your keys with it calls the reset off.';
+  }
+
+  @override
+  String get simpleLoginResetDueTitle => 'Your new keys';
+
+  @override
+  String get simpleLoginResetDueIntro =>
+      'The new keys you asked for can be set up now. Or open your old keys with your password, which calls the reset off.';
+
+  @override
+  String get simpleLoginResetNewKeys => 'Set up new keys';
+
+  @override
+  String get simpleLoginResetNewKeysHint =>
+      'A new password and recovery phrase. What was encrypted under your old keys is lost, unless you finish on a device still signed in.';
+
+  @override
+  String get simpleLoginResetHavePassword => 'I have my password';
+
+  @override
+  String get simpleLoginResetHavePasswordHint => 'Your keys open, and stay.';
+
+  @override
+  String get simpleLoginResetKeepIntro =>
+      'Choose a new password: your keys stay, under it and a new recovery phrase, so nothing is lost. Your other devices are signed out.';
+
+  @override
+  String get simpleLoginResetFinish => 'Set up the keys';
+
+  @override
+  String get simpleLoginProofKeyTitle => 'Your password and a code';
+
+  @override
+  String simpleLoginProofKeyIntroAs(String handle) {
+    return 'Signed in with SimpleLogin as @$handle. Your account also signs in with a password: type it and a code from your authenticator once, and your password opens your keys after SimpleLogin from then on.';
+  }
+
+  @override
+  String get simpleLoginProofKeyIntro =>
+      'Your account also signs in with a password: type it and a code from your authenticator once, and your password opens your keys after SimpleLogin from then on.';
+
+  @override
+  String simpleLoginResetBanner(String date) {
+    return 'New keys were asked for with your SimpleLogin account: from $date, whoever has it can set them up. Unless that was you, call it off with your password.';
+  }
+
+  @override
+  String get simpleLoginResetBannerDue =>
+      'New keys were asked for with your SimpleLogin account, and whoever has it can set them up now. Unless that was you, call it off with your password.';
+
+  @override
+  String get simpleLoginResetBannerDueHere =>
+      'New keys were asked for with your SimpleLogin account and can be set up now. If that was you, finish here: your keys stay. If not, call it off with your password.';
+
+  @override
+  String get simpleLoginResetFinishHere => 'Finish here';
+
+  @override
+  String get simpleLoginCallOffIntro =>
+      'Your password calls off the reset of your keys.';
+
+  @override
+  String get simpleLoginResetCalledOff => 'Reset called off.';
+
+  @override
+  String get simpleLoginResetFinished =>
+      'New password and recovery phrase set.';
+
   @override
   String get simpleLoginUnavailable =>
       'This instance doesn\'t offer sign-in with SimpleLogin.';