fix: make media provenance explicit

apps/api/app/media_catalog.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import json
 import os
 from pathlib import Path
+from urllib.parse import urlsplit
 
 
 MEDIA_ROOT = Path(os.environ.get("MEDIA_ROOT", "data/media")).resolve()
@@ -12,6 +13,22 @@ KNOWN_MEDIA_ROLES = WATERBODY_MEDIA_ROLES | TACKLE_MEDIA_ROLES
 MEDIA_ROLES_BY_ENTITY = {"waterbody": WATERBODY_MEDIA_ROLES, "tackle": TACKLE_MEDIA_ROLES}
 
 
+def _source_system(source_page: object) -> str:
+    """Map only allowlisted hostnames; never promote an unknown URL to official."""
+    try:
+        parsed = urlsplit(str(source_page or ""))
+    except ValueError:
+        return "unknown"
+    hostname = (parsed.hostname or "").lower().rstrip(".")
+    if hostname == "rf4db.com" or hostname.endswith(".rf4db.com"):
+        return "rf4db"
+    if hostname == "rf4map.ru" or hostname.endswith(".rf4map.ru"):
+        return "rf4map"
+    if hostname == "rf4-stat.ru" or hostname.endswith(".rf4-stat.ru"):
+        return "rf4stat"
+    return "unknown"
+
+
 def media_manifest_version() -> int:
     manifest = json.loads((MEDIA_ROOT / "manifest.json").read_text(encoding="utf-8"))
     return max(1, int(manifest.get("version", 1)))
@@ -42,7 +59,7 @@ def published_assets(entity_type: str | None = None, media_role: str | None = No
         if not _public_role_allowed(item.get("entity_type"), item.get("media_role")):
             continue
         source_page = str(item.get("source_page") or "")
-        source = "rf4db" if "rf4db.com" in source_page else "rf4map" if "rf4map.ru" in source_page else "rf4-official"
+        source = _source_system(source_page)
         result.append({
             "id": item["sha256"],
             "entity_type": item.get("entity_type"),
@@ -117,7 +134,7 @@ def review_assets(
         if len(digest) != 64 or not item.get("local_path"):
             continue
         source_page = str(item.get("source_page") or "")
-        source = "rf4db" if "rf4db.com" in source_page else "rf4map" if "rf4map.ru" in source_page else "rf4-official"
+        source = _source_system(source_page)
         result.append({
             "id": digest,
             "status": item_status,