fix(tui): satisfy strict dialog prompt types

packages/tui/src/routes/session/index.tsx

@@ -1528,7 +1528,7 @@ function AssistantMessage(props: { message: AssistantMessage; parts: Part[]; las
           customBorderChars={SplitBorder.customBorderChars}
           borderColor={theme.error}
         >
-          <text fg={theme.textMuted}>{props.message.error?.data.message}</text>
+          <text fg={theme.textMuted}>{String(props.message.error?.data.message ?? "")}</text>
         </box>
       </Show>
       <Switch>

packages/tui/src/ui/dialog-prompt.tsx

@@ -8,7 +8,7 @@ import { useBindings, useCommandShortcut } from "../keymap"
 
 export type DialogPromptProps = {
   title: string
-  description?: () => JSX.Element
+  description?: JSX.Element | (() => JSX.Element)
   placeholder?: string
   value?: string
   busy?: boolean
@@ -25,6 +25,11 @@ export function DialogPrompt(props: DialogPromptProps) {
   const [textareaTarget, setTextareaTarget] = createSignal<TextareaRenderable>()
   let textarea: TextareaRenderable
 
+  const description = () => {
+    if (typeof props.description === "function") return props.description()
+    return props.description
+  }
+
   function confirm() {
     if (props.busy) return
     props.onConfirm?.(textarea.plainText)
@@ -83,7 +88,7 @@ export function DialogPrompt(props: DialogPromptProps) {
         </text>
       </box>
       <box gap={1}>
-        {props.description}
+        {description()}
         <textarea
           height={3}
           ref={(val: TextareaRenderable) => {