fix(skills): P3 frontend polish for skill/agent category split

- skills.ts: make category/agent_type/execution_mode/task_mode optional
  in ISkillInfo and ISkillDetail for backward compat during rollout
- SkillCard.vue: remove dead size="small" on a-tag, add title attr for
  a11y, add isEngine computed, CSS fallback cleanup, category fallback
  in class binding
- SkillsView.vue: fix a-empty condition to use grouped counts so orphan
  skills (category mismatch) don't render a blank page
- SkillsTab.vue: add type tag (引擎/技能) and category-based icon
  (thunderbolt for engine, appstore for business), remove size="small",
  add engine icon color variant

src/agentkit/server/frontend/src/api/skills.ts

@@ -13,11 +13,11 @@ export interface ISkillInfo {
   capabilities: string[]
   dependencies: string[]
   status: string
-  /** "agent_template" = 通用执行引擎 (react/direct/rewoo/...); "business_skill" = 业务领域技能 */
-  category: SkillCategory
-  agent_type: string
-  execution_mode: string
-  task_mode: string
+  /** "agent_template" = 通用执行引擎 (react/direct/rewoo/...); "business_skill" = 业务领域技能. Optional for backward compat during rollout. */
+  category?: SkillCategory
+  agent_type?: string
+  execution_mode?: string
+  task_mode?: string
 }
 
 export interface ISkillDetail {
@@ -28,10 +28,10 @@ export interface ISkillDetail {
   dependencies: string[]
   config: Record<string, unknown>
   health_status: string
-  category: SkillCategory
-  agent_type: string
-  execution_mode: string
-  task_mode: string
+  category?: SkillCategory
+  agent_type?: string
+  execution_mode?: string
+  task_mode?: string
 }
 
 export interface ICapabilityInfo {

src/agentkit/server/frontend/src/components/layout/tabs/SkillsTab.vue

@@ -20,11 +20,19 @@
         v-for="skill in skillsStore.skills"
         :key="skill.name"
         class="skills-tab__item"
+        :class="`skills-tab__item--${skill.category || 'business_skill'}`"
         @click="openSkill(skill.name)"
       >
         <div class="skills-tab__item-header">
-          <AppstoreOutlined class="skills-tab__item-icon" />
+          <component :is="iconFor(skill)" class="skills-tab__item-icon" />
           <span class="skills-tab__item-name">{{ skill.name }}</span>
+          <a-tag
+            class="skills-tab__item-type"
+            :color="isEngine(skill) ? 'purple' : 'blue'"
+            :title="isEngine(skill) ? '执行引擎模板' : '业务领域技能'"
+          >
+            {{ isEngine(skill) ? '引擎' : '技能' }}
+          </a-tag>
           <a-badge
             class="skills-tab__item-status"
             :status="skill.status === 'active' ? 'success' : 'default'"
@@ -33,7 +41,7 @@
         </div>
         <p class="skills-tab__item-desc">{{ skill.description || '暂无描述' }}</p>
         <div class="skills-tab__item-tags">
-          <a-tag v-for="cap in skill.capabilities.slice(0, 3)" :key="cap" size="small">
+          <a-tag v-for="cap in skill.capabilities.slice(0, 3)" :key="cap">
             {{ cap }}
           </a-tag>
           <span v-if="skill.capabilities.length > 3" class="skills-tab__item-more">
@@ -53,13 +61,22 @@
 
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
-import { AppstoreOutlined, WarningOutlined } from '@ant-design/icons-vue'
+import { AppstoreOutlined, ThunderboltOutlined, WarningOutlined } from '@ant-design/icons-vue'
 import { useSkillsStore } from '@/stores/skills'
+import type { ISkillInfo } from '@/api/skills'
 import SkillDetail from '@/components/skills/SkillDetail.vue'
 
 const skillsStore = useSkillsStore()
 const detailVisible = ref(false)
 
+function isEngine(skill: ISkillInfo): boolean {
+  return skill.category === 'agent_template'
+}
+
+function iconFor(skill: ISkillInfo) {
+  return isEngine(skill) ? ThunderboltOutlined : AppstoreOutlined
+}
+
 async function openSkill(name: string): Promise<void> {
   await skillsStore.fetchSkillDetail(name)
   detailVisible.value = true
@@ -130,6 +147,14 @@ onMounted(() => {
   font-size: var(--font-sm);
 }
 
+.skills-tab__item--agent_template .skills-tab__item-icon {
+  color: var(--accent-board);
+}
+
+.skills-tab__item-type {
+  margin-right: 0;
+}
+
 .skills-tab__item-name {
   font-weight: var(--font-weight-medium);
   color: var(--text-primary);

src/agentkit/server/frontend/src/components/skills/SkillCard.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="skill-card" :class="`skill-card--${skill.category}`" @click="$emit('click')">
+  <div class="skill-card" :class="`skill-card--${skill.category || 'business_skill'}`" @click="$emit('click')">
     <a-card hoverable size="small">
       <template #title>
         <div class="skill-card__title">
@@ -10,11 +10,11 @@
       <template #extra>
         <div class="skill-card__badges">
           <a-tag
-            :color="skill.category === 'agent_template' ? 'purple' : 'blue'"
-            size="small"
+            :color="isEngine ? 'purple' : 'blue'"
             class="skill-card__type-tag"
+            :title="isEngine ? '执行引擎模板' : '业务领域技能'"
           >
-            {{ skill.category === 'agent_template' ? '引擎' : '技能' }}
+            {{ isEngine ? '引擎' : '技能' }}
           </a-tag>
           <a-badge
             :status="skill.status === 'active' ? 'success' : 'default'"
@@ -28,13 +28,13 @@
         <code class="skill-card__mode-value">{{ modeText }}</code>
       </div>
       <div class="skill-card__tags">
-        <a-tag v-for="cap in skill.capabilities" :key="cap" size="small" color="blue">
+        <a-tag v-for="cap in skill.capabilities" :key="cap" color="blue">
           {{ cap }}
         </a-tag>
       </div>
       <div v-if="skill.dependencies.length > 0" class="skill-card__deps">
         <span class="skill-card__deps-label">依赖:</span>
-        <a-tag v-for="dep in skill.dependencies.slice(0, 3)" :key="dep" size="small">
+        <a-tag v-for="dep in skill.dependencies.slice(0, 3)" :key="dep">
           {{ dep }}
         </a-tag>
         <span v-if="skill.dependencies.length > 3" class="skill-card__more">
@@ -61,22 +61,18 @@ defineEmits<{
   click: []
 }>()
 
+const isEngine = computed(() => props.skill.category === 'agent_template')
+
 // Differentiate icon by category: engine = thunderbolt, business = appstore
-const titleIcon = computed(() =>
-  props.skill.category === 'agent_template' ? ThunderboltOutlined : AppstoreOutlined
-)
+const titleIcon = computed(() => (isEngine.value ? ThunderboltOutlined : AppstoreOutlined))
 
 // Show the most relevant mode field.
 // Agent templates: execution_mode (react/direct/rewoo/...).
 // Business skills: agent_type (the domain identifier).
 const modeText = computed(() =>
-  props.skill.category === 'agent_template'
-    ? props.skill.execution_mode
-    : props.skill.agent_type
-)
-const modeLabel = computed(() =>
-  props.skill.category === 'agent_template' ? '执行模式' : '领域类型'
+  isEngine.value ? props.skill.execution_mode : props.skill.agent_type
 )
+const modeLabel = computed(() => (isEngine.value ? '执行模式' : '领域类型'))
 </script>
 
 <style scoped>
@@ -118,7 +114,7 @@ const modeLabel = computed(() =>
   align-items: center;
   gap: 4px;
   margin-bottom: var(--space-2);
-  font-size: var(--font-xs, 12px);
+  font-size: var(--font-xs);
 }
 
 .skill-card__mode-label {
@@ -128,7 +124,7 @@ const modeLabel = computed(() =>
 .skill-card__mode-value {
   font-family: 'SF Mono', 'Fira Code', Menlo, Consolas, monospace;
   color: var(--text-secondary);
-  background: var(--bg-secondary, rgba(0, 0, 0, 0.04));
+  background: var(--bg-secondary);
   padding: 1px 4px;
   border-radius: 3px;
 }

src/agentkit/server/frontend/src/views/SkillsView.vue

@@ -62,7 +62,7 @@
       </section>
 
       <a-empty
-        v-if="!skillsStore.isLoading && skillsStore.skills.length === 0"
+        v-if="!skillsStore.isLoading && skillsStore.agentTemplates.length + skillsStore.businessSkills.length === 0"
         description="暂无已注册技能"
       />
     </a-spin>