[Workflow] Add search in variable dropdown (#8479)

- fix Icon variable Plus
- add search input 
- fix dropdown height

## Before

![image](https://github.com/user-attachments/assets/49f73efd-21cc-4ecd-a494-f51edc34dc57)


## After

![image](https://github.com/user-attachments/assets/2af2c7ee-72fd-4dae-a1ef-19e75e1ac026)

packages/twenty-front/src/modules/ui/layout/dropdown/components/DropdownMenuHeader.tsx

@@ -15,9 +15,10 @@ const StyledHeader = styled.li`
   border-top-right-radius: ${({ theme }) => theme.border.radius.sm};
   border-bottom: 1px solid ${({ theme }) => theme.border.color.light};
 
-  padding: ${({ theme }) => theme.spacing(1)};
+  padding: ${({ theme }) => theme.spacing(1)} 0;
 
   user-select: none;
+  width: inherit;
 
   &:hover {
     background: ${({ theme, onClick }) =>

packages/twenty-front/src/modules/ui/layout/dropdown/components/StyledDropdownButtonContainer.tsx

@@ -3,12 +3,17 @@ import styled from '@emotion/styled';
 type StyledDropdownButtonProps = {
   isUnfolded: boolean;
   isActive?: boolean;
+  transparentBackground?: boolean;
 };
 
 export const StyledDropdownButtonContainer = styled.div<StyledDropdownButtonProps>`
   align-items: center;
-  background: ${({ theme, isUnfolded }) =>
-    isUnfolded ? theme.background.transparent.light : theme.background.primary};
+  background: ${({ theme, isUnfolded, transparentBackground }) =>
+    transparentBackground
+      ? 'none'
+      : isUnfolded
+        ? theme.background.transparent.light
+        : theme.background.primary};
   border-radius: ${({ theme }) => theme.border.radius.sm};
   color: ${({ isActive, theme }) =>
     isActive ? theme.color.blue : theme.font.color.secondary};
@@ -22,9 +27,11 @@ export const StyledDropdownButtonContainer = styled.div<StyledDropdownButtonProp
   user-select: none;
 
   &:hover {
-    background: ${({ theme, isUnfolded }) =>
-      isUnfolded
-        ? theme.background.transparent.medium
-        : theme.background.transparent.light};
+    background: ${({ theme, isUnfolded, transparentBackground }) =>
+      transparentBackground
+        ? 'transparent'
+        : isUnfolded
+          ? theme.background.transparent.medium
+          : theme.background.transparent.light};
   }
 `;

packages/twenty-front/src/modules/workflow/search-variables/components/SearchVariablesDropdown.tsx

@@ -11,15 +11,17 @@ import { useTheme } from '@emotion/react';
 import styled from '@emotion/styled';
 import { Editor } from '@tiptap/react';
 import { useState } from 'react';
-import { IconVariable } from 'twenty-ui';
+import { IconVariablePlus } from 'twenty-ui';
 
 const StyledDropdownVariableButtonContainer = styled(
   StyledDropdownButtonContainer,
-)`
-  background-color: ${({ theme }) => theme.background.transparent.lighter};
+)<{ transparentBackground?: boolean }>`
+  background-color: ${({ theme, transparentBackground }) =>
+    transparentBackground
+      ? 'transparent'
+      : theme.background.transparent.lighter};
   color: ${({ theme }) => theme.font.color.tertiary};
-  padding: ${({ theme }) => theme.spacing(0)};
-  margin: ${({ theme }) => theme.spacing(2)};
+  padding: ${({ theme }) => theme.spacing(2)};
 `;
 
 const SearchVariablesDropdown = ({
@@ -65,12 +67,15 @@ const SearchVariablesDropdown = ({
         scope: dropdownId,
       }}
       clickableComponent={
-        <StyledDropdownVariableButtonContainer isUnfolded={isDropdownOpen}>
-          <IconVariable size={theme.icon.size.sm} />
+        <StyledDropdownVariableButtonContainer
+          isUnfolded={isDropdownOpen}
+          transparentBackground
+        >
+          <IconVariablePlus size={theme.icon.size.sm} />
         </StyledDropdownVariableButtonContainer>
       }
       dropdownComponents={
-        <DropdownMenuItemsContainer>
+        <DropdownMenuItemsContainer hasMaxHeight>
           {selectedStep ? (
             <SearchVariablesDropdownStepSubItem
               step={selectedStep}

packages/twenty-front/src/modules/workflow/search-variables/components/SearchVariablesDropdownStepSubItem.tsx

@@ -3,6 +3,7 @@ import { StepOutputSchema } from '@/workflow/search-variables/types/StepOutputSc
 import { isObject } from '@sniptt/guards';
 import { useState } from 'react';
 import { IconChevronLeft, MenuItemSelect } from 'twenty-ui';
+import { DropdownMenuSearchInput } from '@/ui/layout/dropdown/components/DropdownMenuSearchInput';
 
 type SearchVariablesDropdownStepSubItemProps = {
   step: StepOutputSchema;
@@ -16,6 +17,7 @@ const SearchVariablesDropdownStepSubItem = ({
   onBack,
 }: SearchVariablesDropdownStepSubItemProps) => {
   const [currentPath, setCurrentPath] = useState<string[]>([]);
+  const [searchInputValue, setSearchInputValue] = useState('');
 
   const getSelectedObject = () => {
     let selected = step.outputSchema;
@@ -30,6 +32,7 @@ const SearchVariablesDropdownStepSubItem = ({
 
     if (isObject(selectedObject[key])) {
       setCurrentPath([...currentPath, key]);
+      setSearchInputValue('');
     } else {
       onSelect(`{{${step.id}.${[...currentPath, key].join('.')}}}`);
     }
@@ -45,12 +48,25 @@ const SearchVariablesDropdownStepSubItem = ({
 
   const headerLabel = currentPath.length === 0 ? step.name : currentPath.at(-1);
 
+  const options = Object.entries(getSelectedObject());
+
+  const filteredOptions = searchInputValue
+    ? options.filter(([key]) =>
+        key.toLowerCase().includes(searchInputValue.toLowerCase()),
+      )
+    : options;
+
   return (
     <>
       <DropdownMenuHeader StartIcon={IconChevronLeft} onClick={goBack}>
         {headerLabel}
       </DropdownMenuHeader>
-      {Object.entries(getSelectedObject()).map(([key, value]) => (
+      <DropdownMenuSearchInput
+        autoFocus
+        value={searchInputValue}
+        onChange={(event) => setSearchInputValue(event.target.value)}
+      />
+      {filteredOptions.map(([key, value]) => (
         <MenuItemSelect
           key={key}
           selected={false}

packages/twenty-ui/src/display/icon/components/TablerIcons.ts

@@ -231,7 +231,7 @@ export {
   IconUser,
   IconUserCircle,
   IconUsers,
-  IconVariable,
+  IconVariablePlus,
   IconVideo,
   IconWand,
   IconWorld,