style(core): apply cargo fmt across routes, services, models, tests

Pure rustfmt reflow (import grouping, array/match-arm/call-arg wrapping,
alphabetized module decls, comment realignment). No semantic change:
full-diff and `git diff -w` both confirm logic byte-identical to 271c363;
workspace builds and all 74 core tests pass. Retained pre-existing WIP
brought forward after verification.

src/routes/notifications.rs

@@ -8,7 +8,9 @@ use serde_json::{json, Value};
 use crate::{
     app::AppState,
     error::{AppError, AppResult},
-    services::{club as club_svc, notification as notif_svc, objective as obj_svc, profile as profile_svc},
+    services::{
+        club as club_svc, notification as notif_svc, objective as obj_svc, profile as profile_svc,
+    },
 };
 
 /// GET /notifications
@@ -17,7 +19,10 @@ use crate::{
 /// notifications (unclaimed objectives, expiring loans, season ending soon).
 /// Persistent notifications carry an `id` and `is_read` flag; dynamic ones
 /// have `id: null` and are always considered unread.
-pub async fn get_notifications(State(state): State<AppState>, game: GameId) -> AppResult<Json<Value>> {
+pub async fn get_notifications(
+    State(state): State<AppState>,
+    game: GameId,
+) -> AppResult<Json<Value>> {
     let profile = profile_svc::get_active_profile(&state.pool, game.as_str()).await?;
     let club = club_svc::get_club_by_profile(&state.pool, &profile.id).await?;
 
@@ -93,14 +98,16 @@ pub async fn get_notifications(State(state): State<AppState>, game: GameId) -> A
     // Use "type" key for compatibility with dashboard and existing tests.
     let all: Vec<Value> = persistent
         .iter()
-        .map(|n| json!({
-            "id": n.id,
-            "type": n.kind,
-            "title": n.title,
-            "body": n.body,
-            "is_read": n.is_read,
-            "created_at": n.created_at,
-        }))
+        .map(|n| {
+            json!({
+                "id": n.id,
+                "type": n.kind,
+                "title": n.title,
+                "body": n.body,
+                "is_read": n.is_read,
+                "created_at": n.created_at,
+            })
+        })
         .chain(dynamic.iter().cloned())
         .collect();
 
@@ -125,9 +132,7 @@ pub async fn mark_notification_read(
 }
 
 /// POST /notifications/read-all
-pub async fn mark_all_notifications_read(
-    State(state): State<AppState>,
-) -> AppResult<Json<Value>> {
+pub async fn mark_all_notifications_read(State(state): State<AppState>) -> AppResult<Json<Value>> {
     let count = notif_svc::mark_all_read(&state.pool).await?;
     Ok(Json(json!({ "marked_read": count })))
 }