Add audio variants to user input protocols (#33923)

## What changed

- Add remote and local audio variants to core and app-server user inputs, including generated JSON and TypeScript schemas.
- Preserve audio fields when converting app-server inputs and response content into thread items.
- Keep unsupported audio out of model requests, TUI rendering, text extraction, and truncated tool output, using explicit text placeholders where audio is submitted as a model input.

## Testing

- Cover app-server media conversion, unsupported-input placeholders, TUI omission, and tool-output truncation.

GitOrigin-RevId: 16152bf3af674575ce569764a8b472e032e7569d

codex-rs/tui/src/thread_transcript.rs

@@ -13,6 +13,7 @@ use crate::history_cell::split_reasoning_summary_parts;
 use crate::multi_agents::sub_agent_activity_summary;
 use codex_app_server_protocol::Thread;
 use codex_app_server_protocol::ThreadItem;
+use codex_app_server_protocol::UserInput;
 use codex_protocol::ThreadId;
 use codex_protocol::items::UserMessageItem;
 use ratatui::style::Stylize as _;
@@ -54,6 +55,17 @@ pub(crate) fn thread_to_transcript_cells(
                 client_id,
                 content,
             } => {
+                if content.iter().any(|input| {
+                    matches!(
+                        input,
+                        UserInput::Audio { .. } | UserInput::LocalAudio { .. }
+                    )
+                }) {
+                    tracing::warn!(
+                        user_message_id = id,
+                        "audio user inputs are not supported by the TUI and will be omitted"
+                    );
+                }
                 let item = UserMessageItem {
                     id: id.clone(),
                     client_id: client_id.clone(),