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/assets/sources.rs

@@ -47,10 +47,10 @@
 //! comments on each call out the pairing so a future reader doesn't
 //! accidentally drop one half.
 
+use bevy::asset::AssetApp;
+use bevy::asset::io::AssetSourceBuilder;
 use bevy::asset::io::embedded::EmbeddedAssetRegistry;
 use bevy::asset::io::file::FileAssetReader;
-use bevy::asset::io::AssetSourceBuilder;
-use bevy::asset::AssetApp;
 use bevy::prelude::*;
 
 use crate::assets::user_dir::user_theme_dir;
@@ -75,8 +75,7 @@ pub const DARK_THEME_MANIFEST_URL: &str =
 const DARK_THEME_MANIFEST_PATH: &str = "solitaire_engine/assets/themes/dark/theme.ron";
 
 /// Bytes of the bundled Dark theme manifest, embedded at compile time.
-const DARK_THEME_MANIFEST_BYTES: &[u8] =
-    include_bytes!("../../assets/themes/dark/theme.ron");
+const DARK_THEME_MANIFEST_BYTES: &[u8] = include_bytes!("../../assets/themes/dark/theme.ron");
 
 /// Stable embedded asset URL of the bundled Classic theme manifest.
 pub const CLASSIC_THEME_MANIFEST_URL: &str =
@@ -89,8 +88,7 @@ pub const CLASSIC_THEME_MANIFEST_URL: &str =
 const CLASSIC_THEME_MANIFEST_PATH: &str = "solitaire_engine/assets/themes/classic/theme.ron";
 
 /// Bytes of the bundled Classic theme manifest, embedded at compile time.
-const CLASSIC_THEME_MANIFEST_BYTES: &[u8] =
-    include_bytes!("../../assets/themes/classic/theme.ron");
+const CLASSIC_THEME_MANIFEST_BYTES: &[u8] = include_bytes!("../../assets/themes/classic/theme.ron");
 
 /// Generates a `(stable_path, bytes)` entry for one Dark-theme SVG.
 macro_rules! embed_dark_svg {
@@ -377,10 +375,11 @@ mod tests {
     fn populate_embedded_dark_theme_runs_without_asset_plugin() {
         let mut app = App::new();
         populate_embedded_dark_theme(&mut app);
-        assert!(app
-            .world()
-            .get_resource::<EmbeddedAssetRegistry>()
-            .is_some());
+        assert!(
+            app.world()
+                .get_resource::<EmbeddedAssetRegistry>()
+                .is_some()
+        );
     }
 
     #[test]
@@ -425,10 +424,11 @@ mod tests {
     fn populate_embedded_classic_theme_runs_without_asset_plugin() {
         let mut app = App::new();
         populate_embedded_classic_theme(&mut app);
-        assert!(app
-            .world()
-            .get_resource::<EmbeddedAssetRegistry>()
-            .is_some());
+        assert!(
+            app.world()
+                .get_resource::<EmbeddedAssetRegistry>()
+                .is_some()
+        );
     }
 
     #[test]