fix: allow anchor moves to reach exit with key

Update findAnchorTarget to accept optional hasKey parameter. When player has the key and moving to an anchor (gg, G, ^, or $), if an exit is positioned at the edge, allow movement to reach it. This matches behavior of counted moves like 5k that can reach edge-positioned exits.

src/useBoard/types.ts

@@ -27,6 +27,6 @@ export type BoardManager = {
 
 export type MazeNavigator = {
   isValidMove: (from: Coord, to: Coord) => boolean;
-  findAnchorTarget: (from: Coord, direction: 'left' | 'right' | 'top' | 'bottom') => Coord | null;
+  findAnchorTarget: (from: Coord, direction: 'left' | 'right' | 'top' | 'bottom', hasKey?: boolean) => Coord | null;
   validatePath: (from: Coord, direction: Coord, steps: number) => boolean;
 };

src/useBoard/useMazeNavigation.ts

@@ -10,7 +10,7 @@ export function useMazeNavigation(maze: MazeCell[][]): MazeNavigator {
     return true;
   }
 
-   function findAnchorTarget(from: Coord, direction: 'left'|'right'|'top'|'bottom'): Coord | null {
+    function findAnchorTarget(from: Coord, direction: 'left'|'right'|'top'|'bottom', hasKey: boolean = false): Coord | null {
       if (!maze.length) return null;
 
       const rowsCount = maze.length;
@@ -22,6 +22,7 @@ export function useMazeNavigation(maze: MazeCell[][]): MazeNavigator {
       if (direction === 'left' || direction === 'right') {
         const step = direction === 'left' ? -1 : 1;
         let cc = c;
+        let edgeCell: Coord | null = null;
 
         while (true) {
           const next = cc + step;
@@ -35,13 +36,23 @@ export function useMazeNavigation(maze: MazeCell[][]): MazeNavigator {
             if (cc !== expectedCellIdx) return null;
             if (cc === c) return null;
 
-           return { row: r, col: cc };
+            edgeCell = { row: r, col: cc };
+            
+            if (hasKey && wallIdx === expectedWallIdx) {
+              const wallPos = { row: r, col: wallIdx };
+              if (maze[wallPos.row]?.[wallPos.col]?.includes('exit')) {
+                return wallPos;
+              }
+            }
+            
+            return edgeCell;
           }
           cc = next;
         }
       } else {
         const step = direction === 'top' ? -1 : 1;
         let rr = r;
+        let edgeCell: Coord | null = null;
 
         while (true) {
           const next = rr + step;
@@ -55,7 +66,16 @@ export function useMazeNavigation(maze: MazeCell[][]): MazeNavigator {
             if (rr !== expectedCellIdx) return null;
             if (rr === r) return null;
 
-           return { row: rr, col: c };
+            edgeCell = { row: rr, col: c };
+            
+            if (hasKey && wallIdx === expectedWallIdx) {
+              const wallPos = { row: wallIdx, col: c };
+              if (maze[wallPos.row]?.[wallPos.col]?.includes('exit')) {
+                return wallPos;
+              }
+            }
+            
+            return edgeCell;
           }
           rr = next;
         }

src/useCursor/useCursor.ts

@@ -67,7 +67,8 @@ export function useCursor(board: BoardManager, gameStatusManager: GameStatusMana
        target === 'end' ? 'right' :
          target === 'top' ? 'top' : 'bottom';
 
-    const anchorTarget = navigator.findAnchorTarget(currentPos, direction);
+     const hasKey = gameStatusManager.gameStatus === 'has-key';
+     const anchorTarget = navigator.findAnchorTarget(currentPos, direction, hasKey);
      if (!anchorTarget) return;
 
      const dr = anchorTarget.row > currentPos.row ? 1 :