fix(tiles): 修复 Kurast / Mesa / Desert / Barricade 的瓦片引用缺失 (Issue #83)

- wilderness.ts: 在 applyGroundTransitions 中增加 options.levelTypeName 守卫，避免对非 Act 1 关卡执行 Act 1 地面与水岸过渡，消除 Desert (43) 与 Barricade (112, 117) 的无效瓦片生成。
- wilderness-acts.ts:
  - Kurast (79, 80, 81): 大街、桥梁与堤岸 balustrade 改用 Kurast 实际存在的 style 20 (Floors.dt1 / Walls.dt1)，消除不存在的 style 5 / style 4 引用。
  - Mesa (104, 105, 106): 峡谷地面根据 levelTypeName 区分，Act 4 - Mesa 使用 Mesa Floor.dt1 的 style 10 峡谷地表，消除仅在 Lava 存在的 style 20 引用。
- wilderness-siege.ts:
  - Siege (110): 攻城木桩栅栏与破损立柱改用 fence.dt1 存在的 style 2 sequence 10 (type 1 与 type 7)；投石台墙壁使用 palisade wall；废墟使用 camp.dt1 的 style 18 地砖与墙壁。

TAG=agy
CONV=2a1934de-30ef-464e-b3f3-fcbcdbbc49f1

src/game/wilderness-acts.ts

@@ -472,13 +472,14 @@ export function stampAct3KurastCauseway(
         }
       }
       if (x >= walkwayLeft && x <= walkwayRight) {
-        // Paved stone causeway: style 5, prop1 194
+        // Paved stone causeway: style 20, prop1 194
-        paintFloor(canvas, x, y, makeFloor(5, 0, 194), true)
+        paintFloor(canvas, x, y, makeFloor(20, 0, 194), true)
         clearWalls(canvas, x, y)
         causewayCells += 1
       } else if (x === walkwayLeft - 1 || x === walkwayRight + 1) {
-        // Stone balustrade wall: style 1, prop1 129
+        // Stone balustrade wall: style 20, prop1 129
-        paintWall(canvas, x, y, makeWall(1, 0, 1, 129))
+        const wallType = x === walkwayLeft - 1 ? 1 : 2
+        paintWall(canvas, x, y, makeWall(20, 0, wallType, 129))
         balustradeCells += 1
       } else {
         // Deep canal water: style 2, sequence 0, prop1 2
@@ -543,7 +544,7 @@ export function initAct3OutdoorLevel(
     for (let dx = -1; dx <= 1; dx += 1) {
       const x = hubX + dx
       if (!isInsidePreset(x, y, placedRects, 0)) {
-        paintFloor(canvas, x, y, makeFloor(5, 0, 194))
+        paintFloor(canvas, x, y, makeFloor(20, 0, 194))
         clearWalls(canvas, x, y)
         causewayCells += 1
       }
@@ -554,7 +555,7 @@ export function initAct3OutdoorLevel(
     for (let dy = -1; dy <= 1; dy += 1) {
       const y = hubY + dy
       if (!isInsidePreset(x, y, placedRects, 0)) {
-        paintFloor(canvas, x, y, makeFloor(5, 0, 194))
+        paintFloor(canvas, x, y, makeFloor(20, 0, 194))
         clearWalls(canvas, x, y)
         causewayCells += 1
       }
@@ -567,7 +568,7 @@ export function initAct3OutdoorLevel(
     // Stone Bridge crossing at East-West avenue
     if (Math.abs(y - hubY) <= 2) {
       for (let dx = 0; dx < 4; dx += 1) {
-        paintFloor(canvas, canalX + dx, y, makeFloor(4, 0, 2), true)
+        paintFloor(canvas, canalX + dx, y, makeFloor(20, 0, 194), true)
         clearWalls(canvas, canalX + dx, y)
       }
       riverBridges += 1
@@ -582,8 +583,8 @@ export function initAct3OutdoorLevel(
         }
       }
       // Stone canal embankments
-      paintWall(canvas, canalX - 1, y, makeWall(1, 0, 1, 129))
+      paintWall(canvas, canalX - 1, y, makeWall(20, 0, 1, 129))
-      paintWall(canvas, canalX + 4, y, makeWall(1, 0, 1, 129))
+      paintWall(canvas, canalX + 4, y, makeWall(20, 0, 2, 129))
       embankmentWalls += 2
     }
   }
@@ -660,12 +661,15 @@ export function initAct4OutdoorLevel(
       }
       rockyBridges += 1
     } else {
-      // Boiling lava chasm: style 20, sequence 3, prop1 2
+      // Boiling lava chasm for Act 4 - Lava, or rocky canyon floor for Act 4 - Mesa
+      const isLava = request.levelTypeName === 'Act 4 - Lava'
+      const chasmStyle = isLava ? 20 : 10
+      const chasmSeq = isLava ? 3 : 0
       for (let dy = -2; dy <= 2; dy += 1) {
         const y = centerY + dy
         if (y >= 0 && y < height) {
           if (!isInsidePreset(x, y, placedRects, 1)) {
-            paintFloor(canvas, x, y, makeFloor(20, 3, 2), true)
+            paintFloor(canvas, x, y, makeFloor(chasmStyle, chasmSeq, 2), true)
             clearWalls(canvas, x, y)
             lavaChasmCells += 1
           }

src/game/wilderness-siege.ts

@@ -184,22 +184,22 @@ function stampBreachedBarricade(
       })
       breachFloorCount += 1
     } else if (y === breachY - 1 || y === breachY + breachHeight) {
-      // Splintered end-cap post at the breach edge
+      // Splintered end-cap post at the breach edge (fence.dt1 type 7 pillar)
       setWall(canvas, x, y, {
         style: 2,
-        sequence: rng.int(1, 2),
+        sequence: 10,
         prop1: 129,
-        type: 1,
+        type: 7,
         unknown1: 0,
         unknown2: 0,
         hidden: false,
       })
       wallCount += 1
     } else {
-      // Intact spiked wooden palisade
+      // Intact spiked wooden palisade (fence.dt1 type 1 left wall)
       setWall(canvas, x, y, {
         style: 2,
-        sequence: 0,
+        sequence: 10,
         prop1: 129,
         type: 1,
         unknown1: 0,
@@ -247,9 +247,9 @@ function stampCatapultPlatform(
                           (originY > 26 && dy === 0 && dx >= 1 && dx <= 2)
       if (isPerimeter && !isAccessGap) {
         setWall(canvas, x, y, {
-          style: 4,
+          style: 2,
-          sequence: 0,
+          sequence: 10,
-          prop1: 2,
+          prop1: 129,
           type: 1,
           unknown1: 0,
           unknown2: 0,
@@ -261,7 +261,7 @@ function stampCatapultPlatform(
 }
 
 /**
- * Stamp crumbled stone fort ruins (style: 1) interspersed between strips.
+ * Stamp crumbled stone fort ruins (style: 18) interspersed between strips.
  * Features weathered stone flagstone floors and broken masonry walls.
  */
 function stampFortRuin(
@@ -278,22 +278,22 @@ function stampFortRuin(
       const x = originX + dx
       if (x < 4 || x >= canvas.width - 4) continue
 
-      // Ruined flagstone floor
+      // Ruined camp flagstone floor (camp.dt1 style 18 floor)
       setFloor(canvas, x, y, {
-        style: 1,
+        style: 18,
-        sequence: rng.int(0, 2),
+        sequence: rng.int(0, 4),
         prop1: 2,
         unknown1: 0,
         unknown2: 0,
         hidden: false,
       })
 
-      // Weathered/crumbled perimeter wall with missing sections
+      // Weathered/crumbled perimeter wall with missing sections (camp.dt1 style 18 wall)
       const isPerimeter = dx === 0 || dx === size - 1 || dy === 0 || dy === size - 1
       if (isPerimeter && rng.next() > 0.35) {
         setWall(canvas, x, y, {
-          style: 1,
+          style: 18,
-          sequence: rng.int(0, 4),
+          sequence: rng.int(0, 2),
           prop1: 129,
           type: 1,
           unknown1: 0,

src/game/wilderness.ts

@@ -1508,6 +1508,12 @@ export function applyGroundTransitions(
   canvas: Canvas,
   options?: GroundTransitionOptions,
 ): GroundTransitionResult {
+  // Ground transition auto-tiling LUTs (DIRT_PATH_TILE_LUT, WATER_EDGE_TILE_LUT) are specific
+  // to Act 1 Wilderness dirt roads and river water. Skip for other level types.
+  if (options?.levelTypeName !== undefined && options.levelTypeName !== 'Act 1 - Wilderness') {
+    return { transitionCells: 0, roadTransitions: 0, waterTransitions: 0 }
+  }
+
   // Build set of available floor tiles if libraries are provided
   const availableTiles = new Set<string>()
   if (options?.libraries && options.libraries.length > 0) {