fix: resolve MAX_TAG_SLOTS error and z-index dropdown issue

- Replace MAX_TAG_SLOTS with totalSlots in document-tag-entry
- Add z-index to SelectContent in base-tags-modal for proper layering

Author: priyanshu.solanki

apps/sim/app/workspace/[workspaceId]/knowledge/[id]/components/base-tags-modal/base-tags-modal.tsx

@@ -412,7 +412,7 @@ export function BaseTagsModal({ open, onOpenChange, knowledgeBaseId }: BaseTagsM
                         <SelectTrigger className='h-9'>
                           <SelectValue placeholder='Select type' />
                         </SelectTrigger>
-                        <SelectContent>
+                        <SelectContent className='z-[9999]'>
                           {SUPPORTED_FIELD_TYPES.map((type) => {
                             const { used, max } = getSlotUsageByFieldType(type)
                             const isDisabled = used >= max

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/document-tag-entry/document-tag-entry.tsx

@@ -205,7 +205,7 @@ export function DocumentTagEntry({
             )
         ).length
 
-        if (tagDefinitions.length + currentNewTags >= MAX_TAG_SLOTS) {
+        if (tagDefinitions.length + currentNewTags >= totalSlots) {
           // Don't allow creating new tags if we've reached the limit
           return
         }