Phase 23: formation pitch view, season zone bar, season history UI

- mapper.rs: add GET /division/history route; bump exact routes assertion to ≥56
- dashboard: formation pitch view in Squad tab with CSS pitch markings, player
  chips positioned by line, bench row, Grid/Pitch toggle button; season zone
  bar in Division tab (relegation/safe/promotion colour bands + current points
  marker); season history list from GET /division/history; division response
  now includes promotion_pts, relegation_pts, season_length for richer display

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

src/mapper.rs

@@ -237,6 +237,13 @@ const EXACT: &[ExactRoute] = &[
         notes: "FUT notifications (plural form) → Core notifications",
     },
     // ── Squad list ────────────────────────────────────────────────────────────
+    // ── Division / Season history ─────────────────────────────────────────────
+    ExactRoute {
+        ea_method: "GET", ea_path: "/ut/game/fut/division/history",
+        core_method: "GET", core_path: "/division/history",
+        notes: "FUT division history → Core season history",
+    },
+    // ── Squad list ────────────────────────────────────────────────────────────
     ExactRoute {
         ea_method: "GET", ea_path: "/ut/game/fut/squad/list",
         core_method: "GET", core_path: "/squads",
@@ -697,7 +704,7 @@ mod tests {
 
     #[test]
     fn test_total_exact_routes_count() {
-        assert!(EXACT.len() >= 55, "expected at least 55 exact mappings, got {}", EXACT.len());
+        assert!(EXACT.len() >= 56, "expected at least 56 exact mappings, got {}", EXACT.len());
     }
 
     // ── Phase 22 new mappings ─────────────────────────────────────────────────