fix colors for dialog prompt (like session rename prompt in light theme)

packages/opencode/src/cli/cmd/tui/ui/dialog-prompt.tsx

@@ -49,6 +49,9 @@ export function DialogPrompt(props: DialogPromptProps) {
           ref={(val: TextareaRenderable) => (textarea = val)}
           initialValue={props.value}
           placeholder={props.placeholder ?? "Enter text"}
+          textColor={theme.text}
+          focusedTextColor={theme.text}
+          cursorColor={theme.text}
         />
       </box>
       <box paddingBottom={1} gap={1} flexDirection="row">