refactor: give native chat readability one concrete owner (#35231)

src/shared/native-chat/transcript/native-chat-transcript-readability.test.ts

@@ -0,0 +1,11 @@
+import { describe, expect, it } from 'vitest'
+import { isNativeChatTranscriptLocalReadable } from './native-chat-transcript-readability'
+
+describe('native chat transcript readability', () => {
+  it('allows local and runtime-owned hosts but rejects Model-A SSH and unresolved hosts', () => {
+    expect(isNativeChatTranscriptLocalReadable(null)).toBe(true)
+    expect(isNativeChatTranscriptLocalReadable('runtime-ssh-env-1')).toBe(true)
+    expect(isNativeChatTranscriptLocalReadable('ssh-target-1')).toBe(false)
+    expect(isNativeChatTranscriptLocalReadable(undefined)).toBe(false)
+  })
+})

src/shared/native-chat/transcript/native-chat-transcript-readability.ts

@@ -1,4 +1,4 @@
-import { isRuntimeOwnedSshTargetId } from './execution-host'
+import { isRuntimeOwnedSshTargetId } from '../../execution-host'
 
 /** Model-A SSH stores Grok transcripts on a host this renderer cannot read. */
 export function isNativeChatTranscriptLocalReadable(