Apply argument comment lint across codex-rs (#14652)

## Why

Once the repo-local lint exists, `codex-rs` needs to follow the
checked-in convention and CI needs to keep it from drifting. This commit
applies the fallback `/*param*/` style consistently across existing
positional literal call sites without changing those APIs.

The longer-term preference is still to avoid APIs that require comments
by choosing clearer parameter types and call shapes. This PR is
intentionally the mechanical follow-through for the places where the
existing signatures stay in place.

After rebasing onto newer `main`, the rollout also had to cover newly
introduced `tui_app_server` call sites. That made it clear the first cut
of the CI job was too expensive for the common path: it was spending
almost as much time installing `cargo-dylint` and re-testing the lint
crate as a representative test job spends running product tests. The CI
update keeps the full workspace enforcement but trims that extra
overhead from ordinary `codex-rs` PRs.

## What changed

- keep a dedicated `argument_comment_lint` job in `rust-ci`
- mechanically annotate remaining opaque positional literals across
`codex-rs` with exact `/*param*/` comments, including the rebased
`tui_app_server` call sites that now fall under the lint
- keep the checked-in style aligned with the lint policy by using
`/*param*/` and leaving string and char literals uncommented
- cache `cargo-dylint`, `dylint-link`, and the relevant Cargo
registry/git metadata in the lint job
- split changed-path detection so the lint crate's own `cargo test` step
runs only when `tools/argument-comment-lint/*` or `rust-ci.yml` changes
- continue to run the repo wrapper over the `codex-rs` workspace, so
product-code enforcement is unchanged

Most of the code changes in this commit are intentionally mechanical
comment rewrites or insertions driven by the lint itself.

## Verification

- `./tools/argument-comment-lint/run.sh --workspace`
- `cargo test -p codex-tui-app-server -p codex-tui`
- parsed `.github/workflows/rust-ci.yml` locally with PyYAML

---

* -> #14652
* #14651

codex-rs/tui/src/chatwidget/agent.rs

@@ -46,7 +46,7 @@ pub(crate) fn spawn_agent(
                 tracing::error!("{message}");
                 app_event_tx_clone.send(AppEvent::CodexEvent(Event {
                     id: "".to_string(),
-                    msg: EventMsg::Error(err.to_error_event(None)),
+                    msg: EventMsg::Error(err.to_error_event(/*message_prefix*/ None)),
                 }));
                 app_event_tx_clone.send(AppEvent::FatalExitRequest(message));
                 tracing::error!("failed to initialize codex: {err}");

codex-rs/tui/src/chatwidget/realtime.rs

@@ -183,7 +183,7 @@ impl ChatWidget {
             self.realtime_conversation.warned_audio_only_submission = true;
             self.add_info_message(
                 "Realtime voice mode is audio-only. Use /realtime to stop.".to_string(),
-                None,
+                /*hint*/ None,
             );
         } else {
             self.request_redraw();
@@ -212,7 +212,7 @@ impl ChatWidget {
     pub(super) fn request_realtime_conversation_close(&mut self, info_message: Option<String>) {
         if !self.realtime_conversation.is_live() {
             if let Some(message) = info_message {
-                self.add_info_message(message, None);
+                self.add_info_message(message, /*hint*/ None);
             }
             return;
         }
@@ -221,10 +221,10 @@ impl ChatWidget {
         self.realtime_conversation.phase = RealtimeConversationPhase::Stopping;
         self.submit_op(Op::RealtimeConversationClose);
         self.stop_realtime_local_audio();
-        self.set_footer_hint_override(None);
+        self.set_footer_hint_override(/*items*/ None);
 
         if let Some(message) = info_message {
-            self.add_info_message(message, None);
+            self.add_info_message(message, /*hint*/ None);
         } else {
             self.request_redraw();
         }
@@ -232,7 +232,7 @@ impl ChatWidget {
 
     pub(super) fn reset_realtime_conversation_state(&mut self) {
         self.stop_realtime_local_audio();
-        self.set_footer_hint_override(None);
+        self.set_footer_hint_override(/*items*/ None);
         self.realtime_conversation.phase = RealtimeConversationPhase::Inactive;
         self.realtime_conversation.requested_close = false;
         self.realtime_conversation.session_id = None;
@@ -282,7 +282,10 @@ impl ChatWidget {
         let reason = ev.reason;
         self.reset_realtime_conversation_state();
         if !requested && let Some(reason) = reason {
-            self.add_info_message(format!("Realtime voice mode closed: {reason}"), None);
+            self.add_info_message(
+                format!("Realtime voice mode closed: {reason}"),
+                /*hint*/ None,
+            );
         }
         self.request_redraw();
     }

codex-rs/tui/src/chatwidget/skills.rs

@@ -61,7 +61,7 @@ impl ChatWidget {
 
     pub(crate) fn open_manage_skills_popup(&mut self) {
         if self.skills_all.is_empty() {
-            self.add_info_message("No skills available.".to_string(), None);
+            self.add_info_message("No skills available.".to_string(), /*hint*/ None);
             return;
         }
 
@@ -133,7 +133,7 @@ impl ChatWidget {
         }
         self.add_info_message(
             format!("{enabled_count} skills enabled, {disabled_count} skills disabled"),
-            None,
+            /*hint*/ None,
         );
     }