fix(settings): Antigravity's sign-in reads as an Account line, never an empty box (#30850)

Settings > Chat > Providers showed Antigravity's sign-in as a filled grey box holding only a
bright primary "Sign in" button. The host learns whether its chats are signed in only when a
chat starts, so after launch the status line had nothing to say and the box sat empty.

The area is now a plain row under the provider's name: "Account" on one line, the status on the
next, and an outline "Sign in" button. Until the host knows, the status line says chats need an
Antigravity sign-in separate from the agy terminal account.

src/renderer/src/components/settings/AntigravityChatSignInRow.test.tsx

@@ -9,6 +9,7 @@ import type {
 import type { RuntimeClientTarget } from '../../../../shared/runtime-client-target'
 import { callAntigravityChatSignIn } from '@/runtime/runtime-antigravity-accounts-client'
 import { AntigravityChatSignInRow } from './AntigravityChatSignInRow'
+import { AntigravityProviderSignInArea } from './AntigravityProviderSignInArea'
 import { TooltipProvider } from '../ui/tooltip'
 
 const url = 'https://accounts.google.com/o/oauth2/v2/auth?state=s'
@@ -157,3 +158,40 @@ it('sends the address pasted from a browser on another computer to the host', as
     callbackUrl: pasted
   })
 })
+
+// A host learns its sign-in only when a chat starts, so after launch it has no answer to show.
+it("names the account and why it's needed before the host knows its sign-in", async () => {
+  const owner = { kind: 'environment', environmentId: 'provider-unanswered' } as const
+  render(
+    <AntigravityProviderSignInArea
+      owner={owner}
+      label="this computer"
+      install={{
+        kind: 'active',
+        subject: { target: owner, runtimeId: null, agent: 'antigravity' },
+        removable: true,
+        snapshot: {
+          kind: 'known',
+          state: {
+            agent: 'antigravity',
+            revision: 1,
+            available: true,
+            version: '1.0.0',
+            installedVersion: '1.0.0',
+            installedCurrent: true,
+            source: 'managed',
+            operation: null
+          }
+        }
+      }}
+    />
+  )
+  await act(async () => undefined)
+  expect(screen.getByText('Account')).toBeTruthy()
+  expect(screen.getByRole('status').textContent).toBe(
+    'Chats need an Antigravity sign-in, separate from your agy terminal account.'
+  )
+  expect(screen.getByRole('button', { name: 'Sign in' }).hasAttribute('disabled')).toBe(false)
+  await act(async () => publish(owner, null, 'signedOut'))
+  expect(screen.getByRole('status').textContent).toMatch(/^Not signed in\./)
+})

src/renderer/src/components/settings/AntigravityChatSignInRow.tsx

@@ -203,11 +203,13 @@ export function PastedAddressForm(props: {
 }
 
 /** One host's chat sign-in as both Settings layouts show it. `signedOut` is the line for a host
- *  that answered it is not signed in. */
+ *  that answered it is not signed in; `unanswered` stands in while it has nothing else to say, as a
+ *  host learns its sign-in only when a chat starts or asks to sign in. */
 export function useAntigravityChatSignInControls(props: {
   owner: RuntimeClientTarget
   label: string
   signedOut: string
+  unanswered?: string
   disabled: boolean
 }) {
   const { owner, label } = props
@@ -235,7 +237,11 @@ export function useAntigravityChatSignInControls(props: {
     /** The browser's link, while this client's sign-in waits on it. */
     url: ownFlow && flow?.phase === 'waiting' ? (flow.url ?? null) : null,
     line:
-      status === 'known' ? chatSignInLine(flow, auth, openFailed, label, props.signedOut) : null,
+      status === 'known'
+        ? (chatSignInLine(flow, auth, openFailed, label, props.signedOut) ??
+          props.unanswered ??
+          null)
+        : null,
     alert:
       error ??
       (status === 'readFailed' ? readFailed : null) ??

src/renderer/src/components/settings/AntigravityProviderSignInArea.tsx

@@ -38,6 +38,10 @@ export function AntigravityProviderSignInArea(props: {
       'settings.chat.providers.antigravityNotSignedIn',
       'Not signed in. Chats need an Antigravity sign-in, separate from your agy terminal account.'
     ),
+    unanswered: translate(
+      'settings.chat.providers.antigravitySignInNeeded',
+      'Chats need an Antigravity sign-in, separate from your agy terminal account.'
+    ),
     disabled: antigravityChatSignInBlocked(props.install)
   })
   const { alert, copy, copyLabel, ownFlow, url } = signIn
@@ -45,26 +49,31 @@ export function AntigravityProviderSignInArea(props: {
   const line = alert && !ownFlow ? null : signIn.line
   return (
     // Indented to the provider's name, past its icon.
-    <div className="ml-10 space-y-2 rounded-md bg-muted/40 px-3 py-2.5">
-      {/* The line keeps its height until the host answers, so nothing shifts when it does. */}
-      <div className="flex min-h-6 items-center gap-2">
-        <div
-          role="status"
-          className="flex min-w-0 flex-1 items-center gap-1.5 text-xs text-muted-foreground"
-        >
-          {ownFlow ? <LoadingSpinner className="size-3 shrink-0" /> : null}
-          <span className="min-w-0 break-words">
-            {line}
-            {line && alert ? ' ' : null}
-            {alert && (
-              <span role="alert" className="text-destructive">
-                {alert}
-              </span>
-            )}
-          </span>
+    <div className="ml-10 space-y-2">
+      <div className="flex items-center gap-3">
+        <div className="min-w-0 flex-1">
+          <p className="text-xs font-medium leading-none">
+            {translate('settings.chat.providers.antigravityAccount', 'Account')}
+          </p>
+          {/* The line keeps its height until the host answers, so nothing shifts when it does. */}
+          <div
+            role="status"
+            className="mt-1 flex min-h-4 items-center gap-1.5 text-xs text-muted-foreground"
+          >
+            {ownFlow ? <LoadingSpinner className="size-3 shrink-0" /> : null}
+            <span className="min-w-0 break-words">
+              {line}
+              {line && alert ? ' ' : null}
+              {alert && (
+                <span role="alert" className="text-destructive">
+                  {alert}
+                </span>
+              )}
+            </span>
+          </div>
         </div>
         {ownFlow ? (
-          <>
+          <div className="flex shrink-0 items-center gap-1">
             {url && (
               <Button size="xs" variant="ghost" onClick={() => void copy.copyText()}>
                 {copy.status === 'copied' ? <Check /> : <Copy />}
@@ -74,12 +83,12 @@ export function AntigravityProviderSignInArea(props: {
             <Button size="xs" variant="ghost" disabled={signIn.pending} onClick={signIn.cancel}>
               {translate('accounts.antigravity.chatCancel', 'Cancel')}
             </Button>
-          </>
+          </div>
         ) : (
           <Button
             size="xs"
-            // Signed in, the button only switches account, so it steps back from the primary.
-            variant={signIn.action === 'changeAccount' ? 'ghost' : 'default'}
+            // Signed in, the button only switches account, so it steps back further.
+            variant={signIn.action === 'changeAccount' ? 'ghost' : 'outline'}
             disabled={signIn.signInDisabled}
             onClick={signIn.start}
           >

src/renderer/src/i18n/locales/en.json

@@ -217,7 +217,9 @@
         "install": "Install",
         "toggleLabel": "Open {{value0}} as a chat",
         "antigravityDescription": "Antigravity chats run a server Orca downloads to this host, separate from the agy CLI.",
-        "antigravityNotSignedIn": "Not signed in. Chats need an Antigravity sign-in, separate from your agy terminal account."
+        "antigravityNotSignedIn": "Not signed in. Chats need an Antigravity sign-in, separate from your agy terminal account.",
+        "antigravityAccount": "Account",
+        "antigravitySignInNeeded": "Chats need an Antigravity sign-in, separate from your agy terminal account."
       }
     },
     "terminal": {

src/renderer/src/i18n/locales/es.json

@@ -40,7 +40,9 @@
       "providers": {
         "title": "Proveedores",
         "antigravityDescription": "Los chats de Antigravity usan un servidor que Orca descarga en este host, independiente de la CLI de agy.",
-        "antigravityNotSignedIn": "No has iniciado sesión. Los chats necesitan un inicio de sesión de Antigravity, independiente de tu cuenta de agy en la terminal."
+        "antigravityNotSignedIn": "No has iniciado sesión. Los chats necesitan un inicio de sesión de Antigravity, independiente de tu cuenta de agy en la terminal.",
+        "antigravityAccount": "Cuenta",
+        "antigravitySignInNeeded": "Los chats necesitan un inicio de sesión de Antigravity, independiente de tu cuenta de agy en la terminal."
       }
     },
     "terminal": {

src/renderer/src/i18n/locales/fr.json

@@ -144,7 +144,9 @@
       "providers": {
         "title": "Fournisseurs",
         "antigravityDescription": "Les chats Antigravity utilisent un serveur qu’Orca télécharge sur cet hôte, distinct de la CLI agy.",
-        "antigravityNotSignedIn": "Non connecté. Les discussions nécessitent une connexion Antigravity, distincte de votre compte agy du terminal."
+        "antigravityNotSignedIn": "Non connecté. Les discussions nécessitent une connexion Antigravity, distincte de votre compte agy du terminal.",
+        "antigravityAccount": "Compte",
+        "antigravitySignInNeeded": "Les discussions nécessitent une connexion Antigravity, distincte de votre compte agy du terminal."
       }
     },
     "terminal": {

src/renderer/src/i18n/locales/ja.json

@@ -40,7 +40,9 @@
       "providers": {
         "title": "プロバイダー",
         "antigravityDescription": "Antigravity チャットは、Orca がこのホストにダウンロードするサーバーで動作します。agy CLI とは別です。",
-        "antigravityNotSignedIn": "サインインしていません。チャットには、ターミナルの agy アカウントとは別の Antigravity サインインが必要です。"
+        "antigravityNotSignedIn": "サインインしていません。チャットには、ターミナルの agy アカウントとは別の Antigravity サインインが必要です。",
+        "antigravityAccount": "アカウント",
+        "antigravitySignInNeeded": "チャットには、ターミナルの agy アカウントとは別の Antigravity サインインが必要です。"
       }
     },
     "terminal": {

src/renderer/src/i18n/locales/ko.json

@@ -40,7 +40,9 @@
       "providers": {
         "title": "공급자",
         "antigravityDescription": "Antigravity 채팅은 Orca가 이 호스트에 다운로드하는 서버에서 실행되며, agy CLI와는 별개입니다.",
-        "antigravityNotSignedIn": "로그인되어 있지 않습니다. 채팅에는 터미널 agy 계정과 별개인 Antigravity 로그인이 필요합니다."
+        "antigravityNotSignedIn": "로그인되어 있지 않습니다. 채팅에는 터미널 agy 계정과 별개인 Antigravity 로그인이 필요합니다.",
+        "antigravityAccount": "계정",
+        "antigravitySignInNeeded": "채팅에는 터미널 agy 계정과 별개인 Antigravity 로그인이 필요합니다."
       }
     },
     "terminal": {

src/renderer/src/i18n/locales/zh.json

@@ -40,7 +40,9 @@
       "providers": {
         "title": "提供方",
         "antigravityDescription": "Antigravity 聊天运行在 Orca 下载到此主机的服务器上，与 agy CLI 相互独立。",
-        "antigravityNotSignedIn": "未登录。聊天需要单独的 Antigravity 登录，与终端中的 agy 帐户分开。"
+        "antigravityNotSignedIn": "未登录。聊天需要单独的 Antigravity 登录，与终端中的 agy 帐户分开。",
+        "antigravityAccount": "账户",
+        "antigravitySignInNeeded": "聊天需要单独的 Antigravity 登录，与终端中的 agy 帐户分开。"
       }
     },
     "terminal": {