fix(engine,server): safe area clamp, analytics batch, achievement save order, daily rollover, replay validation, leaderboard opt-in (#56, #60, #61, #62, #66, #68)

- #66: Clamp safe-area insets to 25% of window height with warn!() on excess
- #68: Move fire_flush outside per-event loop in analytics (batch flush once)
- #56: Persist progress before marking reward_granted to prevent XP loss on crash
- #60: Add DateRolloverTimer + check_date_rollover system for midnight seed refresh
- #62: Add validate_header() in replay upload with mode/draw_mode allowlists
- #61: Restore two-query leaderboard opt-in check (SELECT then UPDATE); original
       queries already in .sqlx cache; EXISTS variant would require sqlx prepare

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

solitaire_engine/src/replay_playback.rs

@@ -222,10 +222,7 @@ pub fn start_replay_playback(
 /// [`start_replay_playback`] signature — leaves room to hook in
 /// cleanup (e.g. despawning playback-only overlays) without a future
 /// API break.
-pub fn stop_replay_playback(
-    _commands: &mut Commands,
-    state: &mut ResMut<ReplayPlaybackState>,
-) {
+pub fn stop_replay_playback(_commands: &mut Commands, state: &mut ResMut<ReplayPlaybackState>) {
     **state = ReplayPlaybackState::Inactive;
 }
 
@@ -566,9 +563,9 @@ mod tests {
     /// so we drive 200 ms steps and call `update` enough times to pass
     /// the requested duration.
     fn advance_by(app: &mut App, total_secs: f32) {
-        app.insert_resource(TimeUpdateStrategy::ManualDuration(
-            Duration::from_secs_f32(0.2),
-        ));
+        app.insert_resource(TimeUpdateStrategy::ManualDuration(Duration::from_secs_f32(
+            0.2,
+        )));
         let ticks = (total_secs / 0.2).ceil() as usize + 1;
         for _ in 0..ticks {
             app.update();
@@ -651,9 +648,7 @@ mod tests {
         let state = app.world().resource::<ReplayPlaybackState>();
         match state {
             ReplayPlaybackState::Playing {
-                cursor,
-                replay: r,
-                ..
+                cursor, replay: r, ..
             } => {
                 assert_eq!(*cursor, 0);
                 assert_eq!(r.seed, replay.seed);
@@ -931,9 +926,9 @@ mod tests {
                 .add_systems(Update, collect_draws);
             start_playback(&mut app, ten_draws_replay());
             app.update();
-            app.insert_resource(TimeUpdateStrategy::ManualDuration(
-                Duration::from_secs_f32(tick_secs),
-            ));
+            app.insert_resource(TimeUpdateStrategy::ManualDuration(Duration::from_secs_f32(
+                tick_secs,
+            )));
             let ticks = (total_secs / tick_secs).ceil() as usize + 1;
             for _ in 0..ticks {
                 app.update();