Let accounts be set inactive without signing them out

An inactive account keeps its credential and syncs like a rename, but
drops out of every picker and cannot be used until activated again.
Deactivating the selected account switches to the local context as a
published choice, so other devices follow instead of falling back.

Yattee/Views/Components/AccountStatusBadge.swift

@@ -29,6 +29,7 @@ struct AccountStatusBadge: View {
         case .credentialMissing: String(localized: "accounts.status.credentialMissing")
         case .credentialRejected: String(localized: "accounts.status.credentialRejected")
         case .instanceDisabled: String(localized: "accounts.status.instanceDisabled")
+        case .inactive: String(localized: "accounts.status.inactive")
         case .unreachable: String(localized: "accounts.status.unreachable")
         }
     }
@@ -45,6 +46,7 @@ struct AccountStatusBadge: View {
         case .credentialMissing: .secondary
         case .credentialRejected: .red
         case .instanceDisabled: .secondary
+        case .inactive: .secondary
         case .unreachable: .orange
         }
     }

Yattee/Views/Components/DataContextSwitcherMenu.swift

@@ -294,7 +294,7 @@ enum DataContextSwitcherGlyph {
             return true
         case let .temporarilyUnavailable(reason):
             switch reason {
-            case .instanceDisabled, .credentialRejected, .unreachable: return true
+            case .instanceDisabled, .accountInactive, .credentialRejected, .unreachable: return true
             case .checking, .instancePending, .credentialMissing: return false
             }
         }

Yattee/Views/Components/DataContextUnavailableBanner.swift

@@ -40,6 +40,7 @@ struct DataContextUnavailableBanner: View {
         case .checking: "clock"
         case .instancePending: "clock"
         case .instanceDisabled: "server.rack"
+        case .accountInactive: "person.crop.circle.badge.minus"
         case .credentialMissing: "person.badge.key"
         case .credentialRejected: "exclamationmark.triangle.fill"
         case .unreachable: "wifi.exclamationmark"
@@ -50,6 +51,7 @@ struct DataContextUnavailableBanner: View {
         switch reason {
         case .checking, .instancePending: .secondary
         case .instanceDisabled: .secondary
+        case .accountInactive: .secondary
         case .credentialMissing: .secondary
         case .credentialRejected: .red
         case .unreachable: .orange
@@ -61,6 +63,7 @@ struct DataContextUnavailableBanner: View {
         case .checking: String(localized: "subscriptions.banner.checking")
         case .instancePending: String(localized: "subscriptions.banner.instancePending")
         case .instanceDisabled: String(localized: "subscriptions.banner.instanceDisabled")
+        case .accountInactive: String(localized: "subscriptions.banner.accountInactive")
         case .credentialMissing: String(localized: "subscriptions.banner.credentialMissing")
         case .credentialRejected: String(localized: "subscriptions.banner.credentialRejected")
         case .unreachable: String(localized: "subscriptions.banner.unreachable")

Yattee/Views/Settings/AccountsListView.swift

@@ -359,6 +359,21 @@ struct AccountsListView: View {
             Label(String(localized: "accounts.rename"), systemImage: "pencil")
         }
 
+        // Not offered on an orphan: with no source there is nothing an active
+        // account could do that an inactive one cannot.
+        if instance != nil {
+            Button {
+                appEnvironment?.accountsManager.updateIsActive(!account.isActive, for: account.id)
+            } label: {
+                Label(
+                    String(localized: account.isActive ? "accounts.deactivate" : "accounts.activate"),
+                    systemImage: account.isActive
+                        ? "person.crop.circle.badge.minus"
+                        : "person.crop.circle.badge.checkmark"
+                )
+            }
+        }
+
         Button(role: .destructive) {
             pendingRemoval = PendingAccountRemoval(
                 id: account.id,