Add a command to queue messages for existing sessions (#39092)

## What changed

- Add `codex queue --thread <THREAD> --message <TEXT>` to submit a text message through the `thread/queue/add` app-server API.
- Resolve active sessions by UUID or exact name across interactive, exec, and custom sources, and reject ambiguous names.
- Support local and explicit remote app servers while reporting incompatible servers and configuration overrides instead of silently changing the target.
- Reject empty messages and image attachments.

## Testing

- Add CLI coverage for remote submission, validation, unsupported servers, and local-daemon routing.
- Add session lookup and queue tests for stale, non-interactive, custom, and duplicate session names.

GitOrigin-RevId: 44c233f752b63a85c85b92fa6da303336e4ddeca

codex-rs/cli/src/queue_cmd.rs

@@ -0,0 +1,63 @@
+use clap::Parser;
+use clap::builder::NonEmptyStringValueParser;
+use codex_arg0::Arg0DispatchPaths;
+use codex_tui::Cli as TuiCli;
+use codex_utils_cli::CliConfigOverrides;
+
+use crate::InteractiveRemoteOptions;
+use crate::SessionArchiveConfigOverrides;
+use crate::finalize_session_archive_interactive;
+use crate::resolve_remote_endpoint;
+
+#[derive(Debug, Parser)]
+pub(crate) struct QueueCommand {
+    /// Session UUID or exact session name.
+    #[arg(long, value_name = "THREAD")]
+    thread: String,
+
+    /// Message text to queue.
+    #[arg(long, value_name = "TEXT", value_parser = NonEmptyStringValueParser::new())]
+    message: String,
+
+    #[clap(flatten)]
+    remote: InteractiveRemoteOptions,
+
+    #[clap(flatten)]
+    config_overrides: SessionArchiveConfigOverrides,
+}
+
+pub(crate) async fn run_queue_command(
+    command: QueueCommand,
+    interactive: TuiCli,
+    root_config_overrides: CliConfigOverrides,
+    root_remote: Option<String>,
+    root_remote_auth_token_env: Option<String>,
+    arg0_paths: Arg0DispatchPaths,
+) -> anyhow::Result<String> {
+    let QueueCommand {
+        thread,
+        message,
+        remote,
+        config_overrides,
+    } = command;
+    let cli =
+        finalize_session_archive_interactive(interactive, root_config_overrides, config_overrides);
+    if !cli.images.is_empty() {
+        anyhow::bail!("`codex queue` does not support image attachments");
+    }
+    let explicit_remote_endpoint = resolve_remote_endpoint(
+        remote.remote.or(root_remote),
+        remote.remote_auth_token_env.or(root_remote_auth_token_env),
+    )?;
+    codex_tui::run_session_queue_command(
+        thread,
+        message,
+        codex_tui::SessionArchiveCommandOptions {
+            cli,
+            arg0_paths,
+            explicit_remote_endpoint,
+        },
+    )
+    .await
+    .map_err(|error| anyhow::anyhow!("{error:#}"))
+}