fix(ui): avoid mobile prompt focus on switch

Stops auto-focusing the prompt on phone session switches and scopes type-to-focus to the active visible prompt, disabling it on coarse pointers.

packages/ui/src/components/prompt-input/types.ts

@@ -17,6 +17,9 @@ export interface PromptInputProps {
   instanceId: string
   instanceFolder: string
   sessionId: string
+
+  // Used to scope global "type-to-focus" behavior.
+  isActive?: boolean
   onSend: (prompt: string, attachments: Attachment[]) => Promise<void>
   onRunShell?: (command: string) => Promise<void>
   disabled?: boolean