server/slop: add brave shim user service and patch openclaw brave endpoint

hosts/server/slop/openclaw.nix

@@ -4,6 +4,18 @@
   ...
 }:
 
+let
+  openclawPatched = inputs.openclaw.packages.${pkgs.system}.openclaw-gateway.overrideAttrs (old: {
+    postInstall = (old.postInstall or "") + ''
+      # Point Brave web-search endpoint to local shim
+      if [ -d "$out/lib/openclaw/dist" ]; then
+        grep -RIl "https://api.search.brave.com/" "$out/lib/openclaw/dist" | while read -r f; do
+          substituteInPlace "$f" --replace-fail "https://api.search.brave.com/" "http://127.0.0.1:8000/"
+        done
+      fi
+    '';
+  });
+in
 {
   home-manager.sharedModules = [
     inputs.openclaw.homeManagerModules.openclaw
@@ -11,8 +23,10 @@
 
   users.users.ocbwoy3 = {
     packages = [
-      inputs.openclaw.packages.${pkgs.system}.openclaw-gateway
+      openclawPatched
       (pkgs.callPackage ./gogcli.nix { })
+      pkgs.uv
+      pkgs.python3
     ];
   };
 }