Revert "feat: grouped query builder with $upIf/$downIf condition groups"

This reverts commit 99b59070a2.

apps/web/src/query/index.ts

@@ -86,13 +86,6 @@ export function evaluate(query: unknown, ctx: EvalContext): boolean {
 
   const q = query as Record<string, unknown>;
 
-  // $upIf / $downIf — named condition groups, $downIf takes precedence
-  if ("$upIf" in q || "$downIf" in q) {
-    if ("$downIf" in q && evaluate(q.$downIf, ctx)) return false;
-    if ("$upIf" in q) return evaluate(q.$upIf, ctx);
-    return true; // only $downIf set and it didn't match → up
-  }
-
   // $and
   if ("$and" in q) {
     const clauses = q.$and;