feat: puzzle solver algorithm

steam_backlog_enforcer/main.py

@@ -91,6 +91,8 @@ PROTECTED_APP_IDS = {
     1493710,  # Proton Experimental
     1161040,  # Proton BattlEye Runtime
     1007020,  # Proton EasyAntiCheat Runtime
+    # Games allowed to be installed anytime
+    3949040,  # RV There Yet?
 }
 
 STEAMAPPS_PATH = Path("~/.local/share/Steam/steamapps").expanduser()
@@ -1088,10 +1090,15 @@ def _try_reassign_shorter_game(
     candidates.sort(key=lambda g: g.completionist_hours)
     if not candidates or candidates[0].app_id == app_id:
         return False
-    shortest = candidates[0]
+    # Filter out Linux-incompatible games before deciding to reassign.
+    playable = _pick_playable_candidate(
+        [c for c in candidates if c.app_id != app_id],
+    )
+    if playable is None or playable.completionist_hours >= hours:
+        return False
     _echo(
-        f"\n  Reassigning: {shortest.name} is shorter"
-        f" (~{shortest.completionist_hours:.1f}h vs ~{hours:.1f}h)"
+        f"\n  Reassigning: {playable.name} is shorter"
+        f" (~{playable.completionist_hours:.1f}h vs ~{hours:.1f}h)"
     )
     pick_next_game(all_games, state, config)
     return True

steam_backlog_enforcer/protondb.py

@@ -62,8 +62,8 @@ class ProtonDBRating:
         - Its tier is gold but trending to silver or worse.
         - No data exists (unknown compatibility).
         """
-        if not self.tier:
-            return True  # No data → don't block; user can skip manually.
+        if not self.tier or self.tier == "pending":
+            return True  # No data / pending → don't block; user can skip manually.
         tier_rank = TIER_ORDER.get(self.tier, 99)
         min_rank = TIER_ORDER[MIN_PLAYABLE_TIER]
 
@@ -83,7 +83,10 @@ class ProtonDBRating:
 def _load_cache() -> dict[str, Any]:
     """Load the on-disk ProtonDB cache."""
     if PROTONDB_CACHE_FILE.exists():
-        return json.loads(PROTONDB_CACHE_FILE.read_text(encoding="utf-8"))  # type: ignore[no-any-return]
+        data: dict[str, Any] = json.loads(
+            PROTONDB_CACHE_FILE.read_text(encoding="utf-8"),
+        )
+        return data
     return {}