Run cargo fmt on PR #193 code to satisfy the fmt hook

The squashed thinking-notice PR was committed with --no-verify, so three
files were never run through `cargo fmt` under the project's pinned
toolchain (rust-toolchain.toml = 1.96.0). Format them so `cargo fmt
--all -- --check` passes — a prerequisite for wiring the prek suite
(which includes that check) into CI in the next commit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/bot/messaging.rs

@@ -2,7 +2,8 @@ use mxlink::matrix_sdk::{
     Room,
     room::edit::EditedContent,
     ruma::{
-        EventId, OwnedEventId, api::client::receipt::create_receipt::v3::ReceiptType,
+        EventId, OwnedEventId,
+        api::client::receipt::create_receipt::v3::ReceiptType,
         events::room::message::{
             OriginalSyncRoomMessageEvent, RoomMessageEventContentWithoutRelation,
         },

src/controller/chat_completion/mod.rs

@@ -558,7 +558,9 @@ async fn handle_stage_text_generation(
     // loop exits the instant generation resolves, so there is no detached task and no late edit can
     // ever clobber the real answer. `placeholder` is the event we must finalize in every exit path.
     let (result, placeholder) = if let Some(notice_prompt_variables) = notice_prompt_variables {
-        let generation = controller.generate_text(conversation, params).instrument(span);
+        let generation = controller
+            .generate_text(conversation, params)
+            .instrument(span);
         tokio::pin!(generation);
 
         let mut placeholder: Option<OwnedEventId> = None;

src/strings/thinking.rs

@@ -84,11 +84,23 @@ mod tests {
         // Boundaries: light below 30s, medium [30s, 90s), deep at/after 90s.
         // The pools have distinct content, so value comparison identifies the tier.
         assert_eq!(messages_for_elapsed(Duration::from_secs(0)), MESSAGES_LIGHT);
-        assert_eq!(messages_for_elapsed(Duration::from_secs(29)), MESSAGES_LIGHT);
-        assert_eq!(messages_for_elapsed(Duration::from_secs(30)), MESSAGES_MEDIUM);
-        assert_eq!(messages_for_elapsed(Duration::from_secs(89)), MESSAGES_MEDIUM);
+        assert_eq!(
+            messages_for_elapsed(Duration::from_secs(29)),
+            MESSAGES_LIGHT
+        );
+        assert_eq!(
+            messages_for_elapsed(Duration::from_secs(30)),
+            MESSAGES_MEDIUM
+        );
+        assert_eq!(
+            messages_for_elapsed(Duration::from_secs(89)),
+            MESSAGES_MEDIUM
+        );
         assert_eq!(messages_for_elapsed(Duration::from_secs(90)), MESSAGES_DEEP);
-        assert_eq!(messages_for_elapsed(Duration::from_secs(600)), MESSAGES_DEEP);
+        assert_eq!(
+            messages_for_elapsed(Duration::from_secs(600)),
+            MESSAGES_DEEP
+        );
     }
 
     #[test]