address greptile review on PR #4362

- plus-menu-dropdown: drop folder type from the flat mention list (folders organize
  resources but aren't an insertable mention target — the nested rendering already
  excludes them).
- user-input: fold Enter into the mention-mode keydown guard so Enter confirms the
  highlighted resource instead of submitting the form. Falls through to the normal
  Enter-submit path when no match is highlighted (Tab keeps prior behavior).
- dropdown-menu wrapper: drop the misleading cast on the spread — runtime accepts
  onOpenAutoFocus regardless and the cast was hiding any future props added to
  DropdownMenuContentProps.
- plus-menu-dropdown: trim mention-mode + submenu widths to 300px (320px clipped on
  the narrower copilot panel).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: TheodoreSpeaks

apps/sim/app/workspace/[workspaceId]/home/components/user-input/components/plus-menu-dropdown.tsx

@@ -80,12 +80,13 @@ export const PlusMenuDropdown = React.memo(
       const q = rawQuery.toLowerCase().trim()
       // In mention mode always render a flat filtered list — empty query = show everything.
       if (!isMention && !q) return null
+      // Folders organize resources but aren't a valid mention/insertable target — drop them
+      // from the flat list (matches the nested rendering, which also excludes them).
+      const flatGroups = availableResources.filter(({ type }) => type !== 'folder')
       if (isMention && !q) {
-        return availableResources.flatMap(({ type, items }) =>
-          items.map((item) => ({ type, item }))
-        )
+        return flatGroups.flatMap(({ type, items }) => items.map((item) => ({ type, item })))
       }
-      return availableResources.flatMap(({ type, items }) =>
+      return flatGroups.flatMap(({ type, items }) =>
         items.filter((item) => item.name.toLowerCase().includes(q)).map((item) => ({ type, item }))
       )
     }, [isMention, mentionQuery, search, availableResources])

apps/sim/app/workspace/[workspaceId]/home/components/user-input/user-input.tsx

@@ -494,10 +494,13 @@ export const UserInput = forwardRef<UserInputHandle, UserInputProps>(function Us
           plusMenuRef.current?.moveActive(-1)
           return
         }
-        if (e.key === 'Tab' && !e.shiftKey) {
-          e.preventDefault()
-          if (plusMenuRef.current?.selectActive()) return
-          return
+        if ((e.key === 'Tab' || e.key === 'Enter') && !e.shiftKey) {
+          // Confirm the highlighted match if there is one. If no items match, fall
+          // through so Enter still submits and Tab still does its default thing.
+          if (plusMenuRef.current?.selectActive()) {
+            e.preventDefault()
+            return
+          }
         }
       }
 

apps/sim/components/emcn/components/dropdown-menu/dropdown-menu.tsx

@@ -111,7 +111,7 @@ const DropdownMenuContent = React.forwardRef<
         'z-[var(--z-dropdown)] max-h-[240px] min-w-[8rem] max-w-[220px] origin-[--radix-dropdown-menu-content-transform-origin] overflow-y-auto overflow-x-hidden rounded-lg border border-[var(--border)] bg-[var(--bg)] p-1.5 text-[var(--text-body)] shadow-sm',
         className
       )}
-      {...(props as React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content>)}
+      {...props}
     />
   </DropdownMenuPrimitive.Portal>
 ))