chore: cargo fmt across workspace; add analytics domain to CSP

- Apply cargo fmt to solitaire_engine, solitaire_server formatting.
- solitaire_server/src/lib.rs: add https://analytics.aleshym.co to
  script-src, img-src, and connect-src so the analytics beacon loads
  without a CSP violation.
- docs and README updates.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

solitaire_engine/src/replay_overlay/tests.rs

@@ -854,8 +854,7 @@ fn scrub_notch_labels_carry_helper_strings() {
 
     let mut texts = scrub_notch_label_texts(&mut app);
     texts.sort();
-    let mut expected: Vec<String> =
-        scrub_notch_labels().iter().map(|s| s.to_string()).collect();
+    let mut expected: Vec<String> = scrub_notch_labels().iter().map(|s| s.to_string()).collect();
     expected.sort();
     assert_eq!(
         texts, expected,
@@ -1106,10 +1105,22 @@ fn move_log_active_row_text(app: &mut App) -> String {
 #[test]
 fn format_pile_uses_one_indexed_lowercase_names() {
     assert_eq!(format_pile(&KlondikePile::Stock), "waste");
-    assert_eq!(format_pile(&KlondikePile::Foundation(Foundation::Foundation1)), "foundation 1");
-    assert_eq!(format_pile(&KlondikePile::Foundation(Foundation::Foundation3)), "foundation 3");
-    assert_eq!(format_pile(&KlondikePile::Tableau(Tableau::Tableau1)), "tableau 1");
-    assert_eq!(format_pile(&KlondikePile::Tableau(Tableau::Tableau7)), "tableau 7");
+    assert_eq!(
+        format_pile(&KlondikePile::Foundation(Foundation::Foundation1)),
+        "foundation 1"
+    );
+    assert_eq!(
+        format_pile(&KlondikePile::Foundation(Foundation::Foundation3)),
+        "foundation 3"
+    );
+    assert_eq!(
+        format_pile(&KlondikePile::Tableau(Tableau::Tableau1)),
+        "tableau 1"
+    );
+    assert_eq!(
+        format_pile(&KlondikePile::Tableau(Tableau::Tableau7)),
+        "tableau 7"
+    );
 }
 
 /// Move-body formatter renders `StockClick` as a label and