feat(accounts): remove a specific account from the switcher

The switcher only offered 'sign out of active' and 'sign out of all' — no
way to drop a single non-active account (e.g. one stuck in an error state you
can't switch into to sign out). Add a hover × on non-active, non-default rows
and a removeAccount(id) auth action that tears down the client, drops it from
the registry, and clears its per-slot session/token cookies.

Stacks on the switcher redesign in #517.

locales/cs/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Naplánováno",
     "unified_all_unread": "Vše nepřečtené",
     "unified_all_starred": "Vše s hvězdičkou",
-    "unified_all_mail": "Veškerá pošta"
+    "unified_all_mail": "Veškerá pošta",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Výchozí aplikace",

locales/da/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Planlagt",
     "unified_all_unread": "Alle ulæste",
     "unified_all_starred": "Alle med stjerne",
-    "unified_all_mail": "Al post"
+    "unified_all_mail": "Al post",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Standardapps",

locales/de/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Geplant",
     "unified_all_unread": "Alle ungelesenen",
     "unified_all_starred": "Alle markierten",
-    "unified_all_mail": "Alle Mails"
+    "unified_all_mail": "Alle Mails",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Standard-Apps",

locales/en/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Scheduled",
     "unified_all_unread": "All unread",
     "unified_all_starred": "All starred",
-    "unified_all_mail": "All mail"
+    "unified_all_mail": "All mail",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Default apps",

locales/es/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Programados",
     "unified_all_unread": "Todo no leído",
     "unified_all_starred": "Todo destacado",
-    "unified_all_mail": "Todo el correo"
+    "unified_all_mail": "Todo el correo",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Aplicaciones predeterminadas",

locales/fa/common.json

@@ -138,7 +138,9 @@
     "scheduled": "زمان‌بندی شده",
     "unified_all_mail": "همه ایمیل‌ها",
     "unified_all_starred": "همه ستاره‌دارها",
-    "unified_all_unread": "همه خوانده‌نشده‌ها"
+    "unified_all_unread": "همه خوانده‌نشده‌ها",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "برنامه‌های پیش‌فرض",

locales/fr/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Planifiés",
     "unified_all_unread": "Tous les non lus",
     "unified_all_starred": "Tous les favoris",
-    "unified_all_mail": "Tout le courrier"
+    "unified_all_mail": "Tout le courrier",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Applications par défaut",

locales/hu/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Ütemezett",
     "unified_all_unread": "Összes olvasatlan",
     "unified_all_starred": "Összes csillagozott",
-    "unified_all_mail": "Összes levél"
+    "unified_all_mail": "Összes levél",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Alapértelmezett alkalmazások",

locales/it/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Programmate",
     "unified_all_unread": "Tutti i non letti",
     "unified_all_starred": "Tutti gli speciali",
-    "unified_all_mail": "Tutta la posta"
+    "unified_all_mail": "Tutta la posta",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "App predefinite",

locales/ja/common.json

@@ -138,7 +138,9 @@
     "scheduled": "予約済み",
     "unified_all_unread": "すべての未読",
     "unified_all_starred": "すべてのスター付き",
-    "unified_all_mail": "すべてのメール"
+    "unified_all_mail": "すべてのメール",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "既定のアプリ",

locales/ko/common.json

@@ -138,7 +138,9 @@
     "scheduled": "예약됨",
     "unified_all_unread": "모든 읽지 않음",
     "unified_all_starred": "모든 별표",
-    "unified_all_mail": "모든 메일"
+    "unified_all_mail": "모든 메일",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "기본 앱",

locales/lv/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Ieplānots",
     "unified_all_unread": "Visi nelasītie",
     "unified_all_starred": "Visi ar zvaigzni",
-    "unified_all_mail": "Visas vēstules"
+    "unified_all_mail": "Visas vēstules",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Noklusējuma lietotnes",

locales/nl/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Gepland",
     "unified_all_unread": "Alle ongelezen",
     "unified_all_starred": "Alle met ster",
-    "unified_all_mail": "Alle e-mail"
+    "unified_all_mail": "Alle e-mail",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Standaardapps",

locales/pl/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Zaplanowane",
     "unified_all_unread": "Wszystkie nieprzeczytane",
     "unified_all_starred": "Wszystkie oznaczone gwiazdką",
-    "unified_all_mail": "Cała poczta"
+    "unified_all_mail": "Cała poczta",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Aplikacje domyślne",

locales/pt/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Agendados",
     "unified_all_unread": "Tudo não lido",
     "unified_all_starred": "Tudo com estrela",
-    "unified_all_mail": "Todo o correio"
+    "unified_all_mail": "Todo o correio",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Aplicativos padrão",

locales/ro/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Programat",
     "unified_all_unread": "Toate necitite",
     "unified_all_starred": "Toate cu stea",
-    "unified_all_mail": "Toată poșta"
+    "unified_all_mail": "Toată poșta",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Aplicații implicite",

locales/ru/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Запланировано",
     "unified_all_unread": "Все непрочитанные",
     "unified_all_starred": "Все помеченные",
-    "unified_all_mail": "Вся почта"
+    "unified_all_mail": "Вся почта",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Приложения по умолчанию",

locales/tr/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Zamanlandı",
     "unified_all_unread": "Tüm okunmamışlar",
     "unified_all_starred": "Tüm yıldızlılar",
-    "unified_all_mail": "Tüm postalar"
+    "unified_all_mail": "Tüm postalar",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Varsayılan uygulamalar",

locales/uk/common.json

@@ -138,7 +138,9 @@
     "scheduled": "Заплановано",
     "unified_all_unread": "Усі непрочитані",
     "unified_all_starred": "Усі позначені",
-    "unified_all_mail": "Уся пошта"
+    "unified_all_mail": "Уся пошта",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "Програми за замовчуванням",

locales/zh/common.json

@@ -138,7 +138,9 @@
     "scheduled": "已计划",
     "unified_all_unread": "全部未读",
     "unified_all_starred": "全部加星标",
-    "unified_all_mail": "全部邮件"
+    "unified_all_mail": "全部邮件",
+    "remove_account": "Remove account",
+    "remove_account_confirm": "Remove {account} from this device? You can add it back later."
   },
   "protocol_handlers": {
     "title": "默认应用",