Remove all X mirrors: natural order, no flip

Final state per user request (KEIN X-Swap, KEIN X-Flip):
- canvasX = (perp + halfPerp + 0.5) * TILE_SIZE: east (1102)
  at canvasX 128 (left), west (1098) at canvasX 1152 (right).
  Natural order with no swap.
- drawImage with positive width and height: map content reads
  normally, no X-flip on the image.
- Labels in normal orientation (no mirrorLabel).

Map is now fully natural: no X swap, no X flip, no mirror label.
Both the arrangement and image content are in standard orientation.

vendor/clouds3d.js

@@ -337,10 +337,9 @@ function drawTileAt(lng, perp, dx, dz, centerTileX, centerTileY) {
     // UNPACK_FLIP_Y_WEBGL=true inverts V: canvas top -> texture V=1 (top).
     // For lng axis (Y): invert canvasY so lng=+12 (corridor front in
     // N flight) lands at small canvasY (= screen top after flip).
-    // === NATURAL ORDER BUILD v4 ===
-    // No X-swap: east (perp=-2) -> canvasX 128 (left of canvas),
-    // west (perp=+2) -> canvasX 1152 (right). Map content is also
-    // not X-flipped, so the user sees the image in normal orientation.
+    // === NO X-SWAP, NO X-FLIP BUILD v5 ===
+    // Natural order, no swap. East (perp=-2) -> canvasX 128 (left),
+    // west (perp=+2) -> canvasX 1152 (right). No image X-flip.
     var canvasX = (perp + halfPerp + 0.5) * GROUND_TILE_SIZE;
     var canvasY = (lng + halfLong + 0.5) * GROUND_TILE_SIZE;
     if (canvasX < 0 || canvasX >= groundCanvas.width || canvasY < 0 || canvasY >= groundCanvas.height) {
@@ -351,13 +350,9 @@ function drawTileAt(lng, perp, dx, dz, centerTileX, centerTileY) {
         // the corridor orientation (east tiles have their image east
         // on the left of the drawn area, west tiles on the right).
         // Labels are drawn separately in normal orientation, so the
-        // X-flip the image (NS-mirror). The arrangement uses the
-        // natural order (canvasX = perp + ...) so east tiles are on
-        // the LEFT of the screen. The image X-flip makes image east
-        // appear on the right of each east tile (the natural map
-        // orientation).
-        groundCtx.drawImage(img, canvasX + GROUND_TILE_SIZE, canvasY,
-            -GROUND_TILE_SIZE, GROUND_TILE_SIZE);
+        // No X-flip on the image. Map content reads normally.
+        groundCtx.drawImage(img, canvasX, canvasY,
+            GROUND_TILE_SIZE, GROUND_TILE_SIZE);
         groundLoadedTiles[tileX + '_' + tileY] = true;
 
         // Thin border so the user can see where one tile ends and the