feat: 增强课程搜索功能，添加分类筛选

frontend/src/views/manager/growth-path-management.vue

@@ -252,17 +252,6 @@
           <div class="course-config-panel">
             <div class="panel-header">
               <h3>课程配置</h3>
-              <el-input 
-                v-model="courseSearch" 
-                placeholder="搜索课程" 
-                clearable
-                style="width: 200px"
-                @input="handleCourseSearch"
-              >
-                <template #prefix>
-                  <el-icon><Search /></el-icon>
-                </template>
-              </el-input>
             </div>
 
             <!-- 课程库 -->
@@ -271,6 +260,33 @@
                 <span>可选课程</span>
                 <el-tag size="small">{{ filteredCourses.length }} 门</el-tag>
               </div>
+              <!-- 搜索和筛选 -->
+              <div class="course-filter">
+                <el-input 
+                  v-model="courseSearch" 
+                  placeholder="搜索课程名称..." 
+                  clearable
+                  size="small"
+                >
+                  <template #prefix>
+                    <el-icon><Search /></el-icon>
+                  </template>
+                </el-input>
+                <el-select 
+                  v-model="courseCategory" 
+                  placeholder="分类筛选" 
+                  clearable 
+                  size="small"
+                  style="width: 120px"
+                >
+                  <el-option 
+                    v-for="cat in courseCategories" 
+                    :key="cat" 
+                    :label="cat" 
+                    :value="cat" 
+                  />
+                </el-select>
+              </div>
               <div class="library-content" v-loading="coursesLoading">
                 <div 
                   v-for="course in filteredCourses" 
@@ -463,6 +479,7 @@ const filters = ref<{
 // 编辑状态
 const editingPath = ref<EditingPath | null>(null)
 const courseSearch = ref('')
+const courseCategory = ref('')
 const isDragging = ref(false)
 const isDraggingOver = ref(false)
 
@@ -471,13 +488,33 @@ const positions = ref<Position[]>([])
 const courses = ref<Course[]>([])
 
 // ========== 计算属性 ==========
+// 获取所有课程分类
+const courseCategories = computed(() => {
+  const categories = new Set<string>()
+  courses.value.forEach(c => {
+    if (c.category) categories.add(c.category)
+  })
+  return Array.from(categories).sort()
+})
+
 const filteredCourses = computed(() => {
-  if (!courseSearch.value) return courses.value
-  const keyword = courseSearch.value.toLowerCase()
-  return courses.value.filter(c => 
-    (c.name || c.title || '').toLowerCase().includes(keyword) ||
-    (c.category || '').toLowerCase().includes(keyword)
-  )
+  let result = courses.value
+  
+  // 按分类筛选
+  if (courseCategory.value) {
+    result = result.filter(c => c.category === courseCategory.value)
+  }
+  
+  // 按关键词搜索
+  if (courseSearch.value) {
+    const keyword = courseSearch.value.toLowerCase()
+    result = result.filter(c => 
+      (c.name || c.title || '').toLowerCase().includes(keyword) ||
+      (c.category || '').toLowerCase().includes(keyword)
+    )
+  }
+  
+  return result
 })
 
 const requiredCount = computed(() => {
@@ -1083,6 +1120,18 @@ onMounted(() => {
             font-weight: 500;
           }
 
+          .course-filter {
+            display: flex;
+            gap: 8px;
+            padding: 12px 16px;
+            background: #f5f7fa;
+            border-bottom: 1px solid #ebeef5;
+
+            .el-input {
+              flex: 1;
+            }
+          }
+
           .library-content,
           .selected-content {
             flex: 1;