Update source files

crates/borders-core/tests/common/fixtures.rs

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+//! Pre-built test scenarios for integration tests
+//!
+//! These fixtures represent common complex scenarios used across multiple tests.
+//! They are lazily initialized on first use.
+use once_cell::sync::Lazy;
+use std::sync::Arc;
+
+use super::builders::MapBuilder;
+use borders_core::prelude::*;
+
+/// Standard 100x100 plains map (all conquerable)
+pub static PLAINS_MAP: Lazy<Arc<TerrainData>> = Lazy::new(|| Arc::new(MapBuilder::new(100, 100).all_conquerable().build()));
+
+/// Island archipelago map: 50x50 islands separated by water
+pub static ISLAND_MAP: Lazy<Arc<TerrainData>> = Lazy::new(|| Arc::new(MapBuilder::new(100, 100).islands().build()));
+
+/// Continental map: vertical strips of land and water
+pub static CONTINENT_MAP: Lazy<Arc<TerrainData>> = Lazy::new(|| Arc::new(MapBuilder::new(100, 100).continents().build()));
+
+/// Get a clone of the plains map
+pub fn get_plains_map() -> TerrainData {
+    (*PLAINS_MAP.clone()).clone()
+}
+
+/// Get a clone of the island map
+pub fn get_island_map() -> TerrainData {
+    (*ISLAND_MAP.clone()).clone()
+}
+
+/// Get a clone of the continent map
+pub fn get_continent_map() -> TerrainData {
+    (*CONTINENT_MAP.clone()).clone()
+}