fix: trigger tooltip descriptions and filter trigger types from Nodes tab

- Fix trigger tooltip descriptions to use workflow.blocksAbout translations
- Filter TriggerWebhook/TriggerSchedule/TriggerPlugin from Blocks component
- Ensure trigger types only appear in Start tab, not Nodes tab

web/app/components/workflow/block-selector/blocks.tsx

@@ -49,6 +49,12 @@ const Blocks = ({
     return BLOCK_CLASSIFICATIONS.reduce((acc, classification) => {
       const grouped = groupBy(blocks, 'metaData.classification')
       const list = (grouped[classification] || []).filter((block) => {
+        // Filter out trigger types from Blocks tab
+        if (block.metaData.type === BlockEnum.TriggerWebhook
+            || block.metaData.type === BlockEnum.TriggerSchedule
+            || block.metaData.type === BlockEnum.TriggerPlugin)
+          return false
+
         return block.metaData.title.toLowerCase().includes(searchText.toLowerCase()) && availableBlocksTypes.includes(block.metaData.type)
       })
 

web/app/components/workflow/block-selector/start-blocks.tsx

@@ -77,7 +77,7 @@ const StartBlocks = ({
             }
           </div>
           <div className='system-xs-regular text-text-secondary'>
-            {block.description || availableNodesMetaData.nodesMap?.[block.type]?.description}
+            {t(`workflow.blocksAbout.${block.type}`)}
           </div>
           {(block.type === BlockEnumValues.TriggerWebhook || block.type === BlockEnumValues.TriggerSchedule) && (
             <div className='system-xs-regular mb-1 mt-1 text-text-tertiary'>