fix(core,gui,cli): a blocked sign-in no longer asks to update the app (B209)

Proton answers a sign-in it blocks for abuse or rate limits with code
2028 and the text "This version of the app is no longer supported". The
SDK read 2028 as Unknown, so the app passed that text through and told
users to update a current release (issues #28, #39).

- deps: proton-sdk and proton-drive-rs 0.8.3, which name 2028 Blocked
- core: error::sign_in_blocked detects it
- gui: the login page says Proton is refusing sign-in for now and that
  waiting helps, translated in every catalog
- cli: pdfs login adds the same hint to the error
- cli: pdfs diagnose warns instead of failing when cache.db does not
  exist yet; the daemon creates it after the first sign-in
- docs: BUGS.md B209, changelog, troubleshooting entry

po/es.po

@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: proton-drive-linux 2.1.0\n"
 "Report-Msgid-Bugs-To: https://github.com/narrrl/proton-drive-linux/issues\n"
-"POT-Creation-Date: 2026-10-11 23:47+0200\n"
+"POT-Creation-Date: 2026-10-13 18:38+0200\n"
 "PO-Revision-Date: 2026-09-23 12:00+0200\n"
 "Last-Translator: Proton Drive for Linux contributors\n"
 "Language-Team: Spanish\n"
@@ -256,9 +256,9 @@ msgstr ""
 #: crates/pdfs-gui/src/app/pages/locations.rs:1054
 #: crates/pdfs-gui/src/app/pages/locations.rs:1529
 #: crates/pdfs-gui/src/app/pages/locations.rs:1579
-#: crates/pdfs-gui/src/app/pages/login.rs:389
-#: crates/pdfs-gui/src/app/pages/login.rs:503
-#: crates/pdfs-gui/src/app/pages/login.rs:549
+#: crates/pdfs-gui/src/app/pages/login.rs:394
+#: crates/pdfs-gui/src/app/pages/login.rs:508
+#: crates/pdfs-gui/src/app/pages/login.rs:554
 #: crates/pdfs-gui/src/app/pages/photos.rs:2058
 #: crates/pdfs-gui/src/app/pages/shared.rs:939
 #: crates/pdfs-gui/src/app/pages/shared.rs:1020
@@ -3243,13 +3243,20 @@ msgstr ""
 "Demasiados intentos de inicio de sesión. Espere unos minutos e inténtelo de "
 "nuevo."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:234
+#: crates/pdfs-gui/src/app/pages/login.rs:233
+msgid ""
+"Proton is temporarily refusing sign-in from this device. Your app version is "
+"not the problem. Wait several hours, up to a day, without trying again, then "
+"sign in."
+msgstr "Proton rechaza temporalmente el inicio de sesión desde este dispositivo. La versión de la aplicación no es el problema. Espere varias horas, hasta un día, sin volver a intentarlo y luego inicie sesión."
+
+#: crates/pdfs-gui/src/app/pages/login.rs:239
 msgid "Couldn't reach Proton. Check your internet connection and try again."
 msgstr ""
 "No se pudo contactar con Proton. Compruebe su conexión a Internet e "
 "inténtelo de nuevo."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:237
+#: crates/pdfs-gui/src/app/pages/login.rs:242
 msgid ""
 "Signed in, but the session couldn't be saved to the system keyring. Make "
 "sure a keyring (GNOME Keyring or KWallet) is running and unlocked."
@@ -3258,20 +3265,20 @@ msgstr ""
 "sistema. Asegúrese de que un depósito de claves (GNOME Keyring o KWallet) "
 "esté en ejecución y desbloqueado."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:240
+#: crates/pdfs-gui/src/app/pages/login.rs:245
 msgid "Sign-in cancelled: no two-factor code was entered."
 msgstr ""
 "Inicio de sesión cancelado: no se introdujo ningún código de dos factores."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:243
+#: crates/pdfs-gui/src/app/pages/login.rs:248
 msgid "Sign-in cancelled: no mailbox password was entered."
 msgstr "Inicio de sesión cancelado: no se introdujo la contraseña del buzón."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:246
+#: crates/pdfs-gui/src/app/pages/login.rs:251
 msgid "That mailbox password didn't unlock your account."
 msgstr "Esa contraseña del buzón no desbloqueó tu cuenta."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:249
+#: crates/pdfs-gui/src/app/pages/login.rs:254
 msgid ""
 "Sign-in cancelled: the verification wasn't completed. Sign in again to get a "
 "new one."
@@ -3280,35 +3287,35 @@ msgstr ""
 "sesión para obtener una nueva."
 
 #. Translators: {error} is an error message, usually in English.
-#: crates/pdfs-gui/src/app/pages/login.rs:254
+#: crates/pdfs-gui/src/app/pages/login.rs:259
 #, rust-format
 msgid "Sign-in failed: {error}"
 msgstr "Falló el inicio de sesión: {error}"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:365
+#: crates/pdfs-gui/src/app/pages/login.rs:370
 msgid "That mailbox password didn't unlock your account. Try again."
 msgstr "Esa contraseña del buzón no desbloqueó tu cuenta. Inténtalo de nuevo."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:367
+#: crates/pdfs-gui/src/app/pages/login.rs:372
 msgid ""
 "This account has a separate mailbox password. Enter it to unlock your files."
 msgstr ""
 "Esta cuenta tiene una contraseña del buzón independiente. Introdúcela para "
 "desbloquear tus archivos."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:370
+#: crates/pdfs-gui/src/app/pages/login.rs:375
 msgid "Mailbox Password"
 msgstr "Contraseña del buzón"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:376
+#: crates/pdfs-gui/src/app/pages/login.rs:381
 msgid "Mailbox password"
 msgstr "Contraseña del buzón"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:380
+#: crates/pdfs-gui/src/app/pages/login.rs:385
 msgid "Keep unlocked on this computer"
 msgstr "Mantener desbloqueado en este equipo"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:382
+#: crates/pdfs-gui/src/app/pages/login.rs:387
 msgid ""
 "Stores the unlock in the system keyring, so Proton Drive opens without "
 "asking after every login. Otherwise you enter the password once per session."
@@ -3317,50 +3324,50 @@ msgstr ""
 "abra sin preguntar después de cada inicio de sesión. De lo contrario, "
 "introduces la contraseña una vez por sesión."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:390
-#: crates/pdfs-gui/src/app/pages/login.rs:443
+#: crates/pdfs-gui/src/app/pages/login.rs:395
+#: crates/pdfs-gui/src/app/pages/login.rs:448
 msgid "Unlock"
 msgstr "Desbloquear"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:442
+#: crates/pdfs-gui/src/app/pages/login.rs:447
 msgid "Proton Drive is locked. Enter your mailbox password to unlock it."
 msgstr ""
 "Proton Drive está bloqueado. Introduce la contraseña del buzón para "
 "desbloquearlo."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:471
+#: crates/pdfs-gui/src/app/pages/login.rs:476
 msgid "Unlocked."
 msgstr "Desbloqueado."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:476
+#: crates/pdfs-gui/src/app/pages/login.rs:481
 msgid "Couldn't unlock"
 msgstr "No se pudo desbloquear"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:489
+#: crates/pdfs-gui/src/app/pages/login.rs:494
 msgid "Two-Factor Authentication"
 msgstr "Autenticación en dos pasos"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:491
+#: crates/pdfs-gui/src/app/pages/login.rs:496
 msgid ""
 "Enter the code from your authenticator app, or one of your recovery codes."
 msgstr ""
 "Introduzca el código de su aplicación de autenticación o uno de sus códigos "
 "de recuperación."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:497
+#: crates/pdfs-gui/src/app/pages/login.rs:502
 msgid "Authentication code"
 msgstr "Código de autenticación"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:504
+#: crates/pdfs-gui/src/app/pages/login.rs:509
 msgid "Confirm"
 msgstr "Confirmar"
 
 #
-#: crates/pdfs-gui/src/app/pages/login.rs:535
+#: crates/pdfs-gui/src/app/pages/login.rs:540
 msgid "Verify in Your Browser"
 msgstr "Verificar en el navegador"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:537
+#: crates/pdfs-gui/src/app/pages/login.rs:542
 msgid ""
 "The verification page can't be shown in the app on this system. Open it in "
 "your browser, complete it there, then come back and choose Continue."
@@ -3370,20 +3377,20 @@ msgstr ""
 "“Continuar”."
 
 #
-#: crates/pdfs-gui/src/app/pages/login.rs:543
+#: crates/pdfs-gui/src/app/pages/login.rs:548
 msgid "Open Verification Page"
 msgstr "Abrir página de verificación"
 
 #
-#: crates/pdfs-gui/src/app/pages/login.rs:550
+#: crates/pdfs-gui/src/app/pages/login.rs:555
 msgid "Continue"
 msgstr "Continuar"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:589
+#: crates/pdfs-gui/src/app/pages/login.rs:594
 msgid "Sign Out?"
 msgstr "¿Cerrar la sesión?"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:591
+#: crates/pdfs-gui/src/app/pages/login.rs:596
 msgid ""
 "Proton Drive will disconnect and stop syncing until you sign in again. Files "
 "already on this computer stay where they are."
@@ -3392,7 +3399,7 @@ msgstr ""
 "iniciar sesión. Los archivos que ya están en este equipo se quedan donde "
 "están."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:593
+#: crates/pdfs-gui/src/app/pages/login.rs:598
 msgid "Sign Out"
 msgstr "Cerrar la sesión"