feat(skill-editor): add CategoryTabs and TemplateSearch to skill templates section

Add filter controls for skill templates:
- CategoryTabs: tab navigation with mock categories (All, Productivity, etc.)
- TemplateSearch: search input with accessibility attributes
- Grid layout fix to prevent tab width changes on font-weight switch

Update SectionHeader to accept className prop for flexible styling.
Add search placeholder i18n translations.

web/app/components/workflow/skill/start-tab/category-tabs/index.tsx

@@ -0,0 +1,46 @@
+'use client'
+
+import type { FC } from 'react'
+import { memo } from 'react'
+import TabItem from './tab-item'
+
+export type TemplateCategory = {
+  id: string
+  label: string
+}
+// TODO: use real categories from backend
+const MOCK_CATEGORIES: TemplateCategory[] = [
+  { id: 'all', label: 'All' },
+  { id: 'productivity', label: 'Productivity' },
+  { id: 'analysis', label: 'Analysis' },
+  { id: 'search', label: 'Search' },
+  { id: 'development', label: 'Development' },
+  { id: 'security', label: 'Security' },
+]
+
+type CategoryTabsProps = {
+  categories?: TemplateCategory[]
+  activeCategory: string
+  onCategoryChange: (categoryId: string) => void
+}
+
+const CategoryTabs: FC<CategoryTabsProps> = ({
+  categories = MOCK_CATEGORIES,
+  activeCategory,
+  onCategoryChange,
+}) => {
+  return (
+    <div className="flex flex-1 items-center gap-1">
+      {categories.map(category => (
+        <TabItem
+          key={category.id}
+          label={category.label}
+          isActive={activeCategory === category.id}
+          onClick={() => onCategoryChange(category.id)}
+        />
+      ))}
+    </div>
+  )
+}
+
+export default memo(CategoryTabs)

web/app/components/workflow/skill/start-tab/category-tabs/tab-item.tsx

@@ -0,0 +1,47 @@
+'use client'
+
+import type { FC } from 'react'
+import { memo } from 'react'
+import { cn } from '@/utils/classnames'
+
+type TabItemProps = {
+  label: string
+  isActive: boolean
+  onClick: () => void
+}
+
+const TabItem: FC<TabItemProps> = ({
+  label,
+  isActive,
+  onClick,
+}) => {
+  return (
+    <button
+      type="button"
+      className={cn(
+        'grid shrink-0 rounded-lg px-3 py-2 transition-colors',
+        'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-components-input-border-active',
+        isActive
+          ? 'bg-state-base-active'
+          : 'hover:bg-state-base-hover',
+      )}
+      onClick={onClick}
+    >
+      <span className="system-sm-semibold col-start-1 row-start-1 opacity-0" aria-hidden="true">
+        {label}
+      </span>
+      <span
+        className={cn(
+          'col-start-1 row-start-1',
+          isActive
+            ? 'system-sm-semibold text-text-primary'
+            : 'system-sm-medium text-text-tertiary',
+        )}
+      >
+        {label}
+      </span>
+    </button>
+  )
+}
+
+export default memo(TabItem)

web/app/components/workflow/skill/start-tab/section-header.tsx

@@ -6,18 +6,20 @@ import { memo } from 'react'
 type SectionHeaderProps = {
   title: string
   description: string
+  className?: string
 }
 
 const SectionHeader: FC<SectionHeaderProps> = ({
   title,
   description,
+  className,
 }) => {
   return (
-    <header className="mb-3 flex flex-col gap-0.5">
+    <header className={className}>
       <h2 className="title-xl-semi-bold text-text-primary">
         {title}
       </h2>
-      <p className="system-xs-regular text-text-tertiary">
+      <p className="system-xs-regular mt-0.5 text-text-tertiary">
         {description}
       </p>
     </header>

web/app/components/workflow/skill/start-tab/skill-templates-section.tsx

@@ -1,19 +1,33 @@
 'use client'
 
 import type { FC } from 'react'
-import { memo } from 'react'
+import { memo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
+import CategoryTabs from './category-tabs'
 import SectionHeader from './section-header'
+import TemplateSearch from './template-search'
 
 const SkillTemplatesSection: FC = () => {
   const { t } = useTranslation('workflow')
+  const [activeCategory, setActiveCategory] = useState('all')
+  const [searchValue, setSearchValue] = useState('')
 
   return (
-    <section className="px-6">
+    <section className="flex flex-col gap-3 px-6 py-2">
       <SectionHeader
         title={t('skill.startTab.templatesTitle')}
         description={t('skill.startTab.templatesDesc')}
       />
+      <div className="flex w-full items-start gap-1">
+        <CategoryTabs
+          activeCategory={activeCategory}
+          onCategoryChange={setActiveCategory}
+        />
+        <TemplateSearch
+          value={searchValue}
+          onChange={setSearchValue}
+        />
+      </div>
       <div className="flex min-h-[200px] items-center justify-center rounded-xl border border-dashed border-divider-regular bg-background-section-burn">
         <span className="system-sm-regular text-text-quaternary">
           {t('skill.startTab.templatesComingSoon')}

web/app/components/workflow/skill/start-tab/template-search.tsx

@@ -0,0 +1,35 @@
+'use client'
+
+import type { FC } from 'react'
+import { RiSearchLine } from '@remixicon/react'
+import { memo } from 'react'
+import { useTranslation } from 'react-i18next'
+
+type TemplateSearchProps = {
+  value: string
+  onChange: (value: string) => void
+}
+
+const TemplateSearch: FC<TemplateSearchProps> = ({
+  value,
+  onChange,
+}) => {
+  const { t } = useTranslation('workflow')
+
+  return (
+    <div className="flex shrink-0 items-center gap-0.5 rounded-md bg-components-input-bg-normal p-2">
+      <RiSearchLine className="size-4 shrink-0 text-text-placeholder" aria-hidden="true" />
+      <input
+        type="text"
+        name="template-search"
+        aria-label={t('skill.startTab.searchPlaceholder')}
+        className="system-sm-regular min-w-0 flex-1 bg-transparent px-1 text-text-secondary placeholder:text-components-input-text-placeholder focus:outline-none"
+        placeholder={t('skill.startTab.searchPlaceholder')}
+        value={value}
+        onChange={e => onChange(e.target.value)}
+      />
+    </div>
+  )
+}
+
+export default memo(TemplateSearch)

web/i18n/en-US/workflow.json

@@ -1035,6 +1035,7 @@
   "skill.startTab.createBlankSkillDesc": "Start with an empty folder structure",
   "skill.startTab.importSkill": "Import Skill",
   "skill.startTab.importSkillDesc": "Import skill from skill.zip file",
+  "skill.startTab.searchPlaceholder": "Search…",
   "skill.startTab.templatesComingSoon": "Templates coming soon…",
   "skill.startTab.templatesDesc": "Choose a template to bootstrap your agent's capabilities",
   "skill.startTab.templatesTitle": "Skill Templates",

web/i18n/zh-Hans/workflow.json

@@ -1027,6 +1027,7 @@
   "skill.startTab.createBlankSkillDesc": "从空文件夹结构开始",
   "skill.startTab.importSkill": "导入 Skill",
   "skill.startTab.importSkillDesc": "从 skill.zip 文件导入",
+  "skill.startTab.searchPlaceholder": "搜索…",
   "skill.startTab.templatesComingSoon": "模板即将推出…",
   "skill.startTab.templatesDesc": "选择模板来快速构建你的 Agent 能力",
   "skill.startTab.templatesTitle": "Skill 模板",