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/config.py

@@ -52,10 +52,10 @@ def user_data_path(*parts):
     return USER_DATA_DIR.joinpath(*parts)
 
 # Redump 7z store (browsable in the Store tab). Env override; GUI setting wins.
-STORE_ROOT = Path(os.environ.get("PSP_STORE_DIR", "/media/downloads/Sony - PlayStation Portable"))
+STORE_ROOT = Path(os.environ.get("PSP_STORE_DIR", "/data/store"))
 
 # Remote store server (HTTPS). Used by the Store tab as the primary source.
-STORE_SERVER_URL = os.environ.get("PSP_STORE_SERVER", "https://psp.ceaf.dev")
+STORE_SERVER_URL = os.environ.get("PSP_STORE_SERVER", "https://psp.example.com")
 STORE_TOKEN = os.environ.get("PSP_STORE_TOKEN", "")
 
 # Optional direct URLs for the offline cover bundle zips. When unset, the GUI
@@ -76,9 +76,6 @@ ARCHIVE_LOGGED_IN_USER = os.environ.get("PSP_ARCHIVE_LOGGED_IN_USER", "")
 NPS_OUTPUT_DIR = Path(os.environ.get("PSP_NPS_DIR", str(STATE_DIR / "nps")))
 NPS_TSV_BASE = os.environ.get("PSP_NPS_TSV_BASE", "https://nopaystation.com/tsv/")
 
-# pkg2zip binary used to decrypt/extract NPS .pkg files (blank = auto-detect).
-PKG2ZIP_PATH = os.environ.get("PSP_PKG2ZIP_PATH", "")
-
 # Scan roots (used by the scanner phase). Comma-separated in env.
 GAMES_ROOTS = [Path(p) for p in os.environ.get("PSP_GAMES_ROOTS", "/data/umd_games").split(",") if p.strip()]
 VIDEO_ROOTS = [Path(p) for p in os.environ.get("PSP_VIDEO_ROOTS", "/data/umd_videos").split(",") if p.strip()]