feat(scala): m01–m06 port with shared fixtures

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scala/solutions/View.scala

@@ -0,0 +1,40 @@
+package snake
+
+/** A thing to draw. The picture is plain data; drawing it is somebody else's job (m07). */
+enum Shape:
+  case Rect(x: Int, y: Int, w: Int, h: Int, color: String)
+  case Text(x: Int, y: Int, text: String, color: String, size: Int, align: String)
+
+/** A picture: shapes drawn in order. */
+type Scene = List[Shape]
+
+/** m06 view: the picture is plain data (a list of shapes); drawing it is somebody else's job (m07). */
+object View:
+
+  val CELL: Int = 20
+
+  private def rect(x: Int, y: Int, w: Int, h: Int, color: String): Shape = Shape.Rect(x, y, w, h, color)
+
+  private def text(x: Int, y: Int, str: String, size: Int, align: String): Shape =
+    Shape.Text(x, y, str, "#ffffff", size, align)
+
+  // One cell, inset by 1px so neighbouring segments show a gap.
+  private def cell(p: Point, color: String): Shape = rect(p.x * CELL + 1, p.y * CELL + 1, CELL - 2, CELL - 2, color)
+
+  private def overlay(state: GameState): Scene =
+    val cx = state.width * CELL / 2
+    val cy = state.height * CELL / 2
+    def banner(title: String, hint: String): Scene =
+      List(text(cx, cy, title, 32, "center"), text(cx, cy + 30, hint, 16, "center"))
+    state.status match
+      case Status.Paused   => banner("Paused", "Press Space to resume")
+      case Status.GameOver => banner("Game Over", "Press R to restart")
+      case Status.Won      => banner("You Win!", "Press R to restart")
+      case Status.Playing  => Nil
+
+  def view(state: GameState): Scene =
+    List(rect(0, 0, state.width * CELL, state.height * CELL, "#111111")) ++
+      state.apple.map(cell(_, "#e53935")).toList ++
+      state.snake.zipWithIndex.map((p, i) => cell(p, if i == 0 then "#7cb342" else "#43a047")) ++
+      List(text(6, 18, s"Score: ${state.score}", 16, "left")) ++
+      overlay(state)