fix: super admins bypass AI build quota limits

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/core/ai_quota_service.py

@@ -85,12 +85,14 @@ async def check_ai_quota(
     account_id: UUID,
     db: AsyncSession,
     billing_anchor: Optional[datetime] = None,
+    is_super_admin: bool = False,
 ) -> tuple[bool, dict]:
     """Check if user can make an AI generation.
 
     Returns (allowed, quota_status_dict).
     Monthly counts only rows with counts_toward_quota=True.
     Daily counts only rows with generation_type in ('scaffold', 'branch_detail').
+    Super admins bypass all limits.
     """
     plan = await get_user_plan(account_id, db)
     monthly_limit, daily_limit = await _get_effective_limits(account_id, plan, db)
@@ -120,6 +122,10 @@ async def check_ai_quota(
 
     allowed = True
     deny_reason = None
+    if is_super_admin:
+        # Super admins bypass all limits
+        monthly_limit = None
+        daily_limit = None
     if monthly_limit is not None and monthly_count >= monthly_limit:
         allowed = False
         deny_reason = "monthly"