fix(gui,cli,core): offer the CAPTCHA in the browser when the web view cannot start (B195)

The verification window now runs in its own process, so the app survives
when WebKit cannot start its sandbox on secureblue, but the CAPTCHA still
could not be solved there (#29). WebKit binds the journal socket with
`--ro-bind-try`, bubblewrap only skips a missing path, not an unreadable
one, and WebKit has no switch to leave the socket out.

Proton Mail Bridge never uses a web view: it opens verify.proton.me in the
system browser and retries with the original challenge token, typed with
the offered methods. Do the same as a fallback.

- core: `browser_verification_url` and `browser_verified` build the page
  URL and the retry credential from the challenge
- gui: when the verification window fails, a dialog opens the page in the
  browser and continues the sign-in once the user is done
- cli: `pdfs login` handles a CAPTCHA the same way instead of failing
- i18n: translate the new dialog in every catalog
- docs: B195, TROUBLESHOOTING.md, ARCHITECTURE.md, changelog

Fixes #29

po/pt_BR.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: 2026-10-08 10:15+0200\n"
+"POT-Creation-Date: 2026-10-08 18:47+0200\n"
 "PO-Revision-Date: 2026-09-23 12:00+0200\n"
 "Last-Translator: Proton Drive for Linux contributors\n"
 "Language-Team: Portuguese (Brazil)\n"
@@ -271,8 +271,9 @@ msgstr ""
 #: crates/pdfs-gui/src/app/pages/locations.rs:1013
 #: crates/pdfs-gui/src/app/pages/locations.rs:1488
 #: crates/pdfs-gui/src/app/pages/locations.rs:1538
-#: crates/pdfs-gui/src/app/pages/login.rs:393
-#: crates/pdfs-gui/src/app/pages/login.rs:507
+#: 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/photos.rs:2055
 #: crates/pdfs-gui/src/app/pages/shared.rs:946
 #: crates/pdfs-gui/src/app/pages/shared.rs:1027
@@ -3178,35 +3179,25 @@ msgstr "Digite seu e-mail e senha."
 msgid "Signing in…"
 msgstr "Entrando…"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:164
+#: crates/pdfs-gui/src/app/pages/login.rs:160
 msgid "Complete the verification to continue…"
 msgstr "Conclua a verificação para continuar…"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:197
+#: crates/pdfs-gui/src/app/pages/login.rs:195
 msgid "login cancelled"
 msgstr "login cancelado"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:210
-msgid ""
-"The verification page couldn't be opened, so the sign-in was cancelled. Your "
-"system may keep the web view's sandbox from starting; the troubleshooting "
-"guide explains what to do."
-msgstr ""
-"Não foi possível abrir a página de verificação, então a entrada foi "
-"cancelada. Seu sistema pode estar impedindo que a sandbox da visualização "
-"web inicie; o guia de solução de problemas explica o que fazer."
-
-#: crates/pdfs-gui/src/app/pages/login.rs:233
+#: crates/pdfs-gui/src/app/pages/login.rs:228
 msgid "Too many sign-in attempts. Wait a few minutes and try again."
 msgstr "Muitas tentativas de entrar. Aguarde alguns minutos e tente novamente."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:239
+#: crates/pdfs-gui/src/app/pages/login.rs:234
 msgid "Couldn't reach Proton. Check your internet connection and try again."
 msgstr ""
 "Não foi possível acessar o Proton. Verifique sua conexão com a internet e "
 "tente novamente."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:242
+#: crates/pdfs-gui/src/app/pages/login.rs:237
 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."
@@ -3215,19 +3206,19 @@ msgstr ""
 "Certifique-se de que um chaveiro (GNOME Keyring ou KWallet) esteja em "
 "execução e desbloqueado."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:245
+#: crates/pdfs-gui/src/app/pages/login.rs:240
 msgid "Sign-in cancelled: no two-factor code was entered."
 msgstr "Entrada cancelada: nenhum código de dois fatores foi digitado."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:248
+#: crates/pdfs-gui/src/app/pages/login.rs:243
 msgid "Sign-in cancelled: no mailbox password was entered."
 msgstr "Entrada cancelada: nenhuma senha da caixa de correio foi digitada."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:251
+#: crates/pdfs-gui/src/app/pages/login.rs:246
 msgid "That mailbox password didn't unlock your account."
 msgstr "Essa senha da caixa de correio não desbloqueou sua conta."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:254
+#: crates/pdfs-gui/src/app/pages/login.rs:249
 msgid ""
 "Sign-in cancelled: the verification wasn't completed. Sign in again to get a "
 "new one."
@@ -3236,36 +3227,36 @@ msgstr ""
 "receber uma nova."
 
 #. Translators: {error} is an error message, usually in English.
-#: crates/pdfs-gui/src/app/pages/login.rs:259
+#: crates/pdfs-gui/src/app/pages/login.rs:254
 #, rust-format
 msgid "Sign-in failed: {error}"
 msgstr "Falha ao entrar: {error}"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:369
+#: crates/pdfs-gui/src/app/pages/login.rs:365
 msgid "That mailbox password didn't unlock your account. Try again."
 msgstr ""
 "Essa senha da caixa de correio não desbloqueou sua conta. Tente novamente."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:371
+#: crates/pdfs-gui/src/app/pages/login.rs:367
 msgid ""
 "This account has a separate mailbox password. Enter it to unlock your files."
 msgstr ""
 "Esta conta tem uma senha da caixa de correio separada. Digite-a para "
 "desbloquear seus arquivos."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:374
+#: crates/pdfs-gui/src/app/pages/login.rs:370
 msgid "Mailbox Password"
 msgstr "Senha da caixa de correio"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:380
+#: crates/pdfs-gui/src/app/pages/login.rs:376
 msgid "Mailbox password"
 msgstr "Senha da caixa de correio"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:384
+#: crates/pdfs-gui/src/app/pages/login.rs:380
 msgid "Keep unlocked on this computer"
 msgstr "Manter desbloqueado neste computador"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:386
+#: crates/pdfs-gui/src/app/pages/login.rs:382
 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."
@@ -3274,49 +3265,70 @@ msgstr ""
 "sem perguntar após cada login. Caso contrário, você digita a senha uma vez "
 "por sessão."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:394
-#: crates/pdfs-gui/src/app/pages/login.rs:447
+#: crates/pdfs-gui/src/app/pages/login.rs:390
+#: crates/pdfs-gui/src/app/pages/login.rs:443
 msgid "Unlock"
 msgstr "Desbloquear"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:446
+#: crates/pdfs-gui/src/app/pages/login.rs:442
 msgid "Proton Drive is locked. Enter your mailbox password to unlock it."
 msgstr ""
 "O Proton Drive está bloqueado. Digite a senha da caixa de correio para "
 "desbloqueá-lo."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:475
+#: crates/pdfs-gui/src/app/pages/login.rs:471
 msgid "Unlocked."
 msgstr "Desbloqueado."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:480
+#: crates/pdfs-gui/src/app/pages/login.rs:476
 msgid "Couldn't unlock"
 msgstr "Não foi possível desbloquear"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:493
+#: crates/pdfs-gui/src/app/pages/login.rs:489
 msgid "Two-Factor Authentication"
 msgstr "Autenticação de dois fatores"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:495
+#: crates/pdfs-gui/src/app/pages/login.rs:491
 msgid ""
 "Enter the code from your authenticator app, or one of your recovery codes."
 msgstr ""
 "Digite o código do seu aplicativo autenticador ou um dos seus códigos de "
 "recuperação."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:501
+#: crates/pdfs-gui/src/app/pages/login.rs:497
 msgid "Authentication code"
 msgstr "Código de autenticação"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:508
+#: crates/pdfs-gui/src/app/pages/login.rs:504
 msgid "Confirm"
 msgstr "Confirmar"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:536
+#: crates/pdfs-gui/src/app/pages/login.rs:535
+#
+msgid "Verify in Your Browser"
+msgstr "Verificar no navegador"
+
+#: crates/pdfs-gui/src/app/pages/login.rs:537
+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."
+msgstr "A página de verificação não pode ser exibida no app neste sistema. Abra-a no navegador, conclua-a lá e depois volte e escolha “Continuar”."
+
+#: crates/pdfs-gui/src/app/pages/login.rs:543
+#
+msgid "Open Verification Page"
+msgstr "Abrir página de verificação"
+
+#: crates/pdfs-gui/src/app/pages/login.rs:550
+#
+msgid "Continue"
+msgstr "Continuar"
+
+#: crates/pdfs-gui/src/app/pages/login.rs:589
 msgid "Sign Out?"
 msgstr "Sair?"
 
-#: crates/pdfs-gui/src/app/pages/login.rs:538
+#: crates/pdfs-gui/src/app/pages/login.rs:591
 msgid ""
 "Proton Drive will disconnect and stop syncing until you sign in again. Files "
 "already on this computer stay where they are."
@@ -3324,7 +3336,7 @@ msgstr ""
 "O Proton Drive será desconectado e deixará de sincronizar até você entrar "
 "novamente. Os arquivos que já estão neste computador permanecem onde estão."
 
-#: crates/pdfs-gui/src/app/pages/login.rs:540
+#: crates/pdfs-gui/src/app/pages/login.rs:593
 msgid "Sign Out"
 msgstr "Sair"
 
@@ -6092,6 +6104,15 @@ msgstr "{count} a"
 msgid "cannot reach the Proton Drive daemon: {error}"
 msgstr "não foi possível acessar o daemon do Proton Drive: {error}"
 
+#~ msgid ""
+#~ "The verification page couldn't be opened, so the sign-in was cancelled. "
+#~ "Your system may keep the web view's sandbox from starting; the "
+#~ "troubleshooting guide explains what to do."
+#~ msgstr ""
+#~ "Não foi possível abrir a página de verificação, então a entrada foi "
+#~ "cancelada. Seu sistema pode estar impedindo que a sandbox da visualização "
+#~ "web inicie; o guia de solução de problemas explica o que fazer."
+
 #~ msgid "Jump to a month"
 #~ msgstr "Ir para um mês"