Polish settings, add matching defaults, drop pkg2zip, externalize infra config

- Rework Settings tab into grouped sections
- Add preferred-region matching and full-hash-by-default setting
- Replace combo-box square arrow with a proper chevron
- Fix UMD Refresh button (clicked bool was clearing the view)
- Remove pkg2zip.exe fallback (pure-Python decryptor is the primary path)
- Move LAN IP/share paths to .env; use example defaults in config

app/transfers.py

@@ -476,11 +476,10 @@ class NoPayStationSource(Source):
 
     label = "NoPayStation"
 
-    def __init__(self, content_type, tsv_url="", pkg2zip_path="", force=False):
+    def __init__(self, content_type, tsv_url="", force=False):
         from . import nopaystation
         self.content_type = content_type
         self.tsv_url = tsv_url or nopaystation.tsv_url(content_type)
-        self.pkg2zip = pkg2zip_path or ""
         self.force = force
 
     def scan(self, root=None):
@@ -492,10 +491,7 @@ class NoPayStationSource(Source):
         dest_dir = Path(dest_dir)
         dest_dir.mkdir(parents=True, exist_ok=True)
 
-        # The bundled Python decryptor handles PSP/PSX/themes/DLC directly;
-        # pkg2zip is only an optional fallback if a binary happens to be
-        # configured (and only supports games/PSX).
-        pkg2zip = nopaystation.find_pkg2zip(self.pkg2zip)
+        # The bundled Python decryptor handles PSP/PSX/themes/DLC directly.
         title_id = item.get("title_id") or item.get("content_id") or ""
         pkg_name = re.sub(r"[^A-Za-z0-9_-]", "", title_id) or "pkg"
         tmp = Path(tempfile.mkdtemp(prefix="nps-download-"))
@@ -505,7 +501,7 @@ class NoPayStationSource(Source):
                 progress_cb("Downloading", 0.0, "")
             download_url(item["pkg_url"], pkg, None, progress_cb, cancel_event)
             kind_hint = self.content_type if self.content_type in ("theme", "dlc") else None
-            folder = nopaystation.extract_pkg(pkg, title_id, dest_dir, pkg2zip,
+            folder = nopaystation.extract_pkg(pkg, title_id, dest_dir,
                                               kind_hint, progress_cb, cancel_event)
             if self.content_type in ("theme", "dlc"):
                 _write_sidecar(folder, item)