Revert empty TypeLayer channels (corrupt layers); center paragraph justify

Empty channels made PS report corrupted layers. Restore raster channels
(keeps layers valid). Template paragraph is justify (spreads short text
across the box, causing huge letter spacing after conversion) - set
Justification to center.

ppl2psd.py

@@ -525,6 +525,13 @@ def build_type_layer_tysh(ly: dict, font_ps: str) -> bytes:
     text_len = len(text)
     eng["StyleRun"]["RunLengthArray"] = List([Integer(text_len)])
     eng["ParagraphRun"]["RunLengthArray"] = List([Integer(text_len)])
+    # Template paragraph is justify (Justification=5), which spreads short
+    # text across the whole box. The ppl text is centered -> center align.
+    try:
+        props = eng["ParagraphRun"]["RunArray"][0]["ParagraphSheet"]["Properties"]
+        props["Justification"] = Integer(1)  # center
+    except Exception:
+        pass
 
     prof = font_profile(_font_path_for(ly))
     size_px = float(ly.get("textSize", "12") or 12) * prof["k"]