Treat /var/home/<user>/* as removable on Fedora Atomic

On Fedora Silverblue, Kinoite, Bazzite, etc., /home is a symlink to
/var/home, and accounts created after first-boot often have $HOME set
to /var/home/<user> directly. Game directories stored under that path
were misclassified as protected by is_removeable(), so the uninstall
dialog refused to delete them.

Extend the existing /var special case to fold /var/home/<user>/* into
the /home/<user>/* logic, preserving the same protections for the user
root and PROTECTED_HOME_FOLDERS entries. Fixes #6685.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lutris/util/system.py

@@ -476,10 +476,14 @@ def is_removeable(path: str, system_config: dict[str, str]) -> bool:
 
     if parts[0] == "var":
         # Fedora Silverblue puts mount points under /var since they are mutable
-        # so we'll special case /var/mnt/<drive>/*.
+        # so we'll special case /var/mnt/<drive>/* and /var/media/<drive>/*,
+        # and /var/home/<user>/* (since /home is a symlink to /var/home).
         if len(parts) > 3 and parts[1] in ("mnt", "media"):
             return True
-        return False
+        if len(parts) > 1 and parts[1] == "home":
+            parts = parts[1:]
+        else:
+            return False
 
     if parts[0] in ("usr", "lib", "etc", "boot", "sbin", "bin"):
         # Path is part of the system folders