diff --git a/src/i18n/en/tasks.ts b/src/i18n/en/tasks.ts
index 2939536..28dc902 100644
--- a/src/i18n/en/tasks.ts
+++ b/src/i18n/en/tasks.ts
@@ -53,6 +53,9 @@ export default {
       desc: 'Description',
       branch: 'Branch',
       priority: 'Priority',
+      // F-260619-01: related idea (1:1, optional)
+      idea: 'Related Idea',
+      ideaPlaceholder: 'None (optional)',
       titlePlaceholder: 'Enter task title...',
       descPlaceholder: 'Brief description (optional)',
       branchPlaceholder: 'feature/xxx (optional)',
diff --git a/src/i18n/zh-CN/tasks.ts b/src/i18n/zh-CN/tasks.ts
index bf25b0d..c180102 100644
--- a/src/i18n/zh-CN/tasks.ts
+++ b/src/i18n/zh-CN/tasks.ts
@@ -53,6 +53,9 @@ export default {
       desc: '描述',
       branch: '分支',
       priority: '优先级',
+      // F-260619-01:关联灵感(1对1 单向,可选)
+      idea: '关联灵感',
+      ideaPlaceholder: '不关联(可选)',
       titlePlaceholder: '输入任务标题...',
       descPlaceholder: '简要描述(可选)',
       branchPlaceholder: 'feature/xxx(可选)',
diff --git a/src/views/Tasks.vue b/src/views/Tasks.vue
index 45fb794..c8f2fa3 100644
--- a/src/views/Tasks.vue
+++ b/src/views/Tasks.vue
@@ -149,6 +149,14 @@
             <option :value="3">{{ $t('tasks.modal.priorityLow') }}</option>
           </select>
         </div>
+        <!-- F-260619-01:关联灵感(1对1 单向,可选)。空串=不关联,与后端/AI 工具层一致。 -->
+        <div class="modal-field">
+          <label>{{ $t('tasks.modal.idea') }}</label>
+          <select v-model="newTaskIdeaId">
+            <option value="">{{ $t('tasks.modal.ideaPlaceholder') }}</option>
+            <option v-for="idea in store.ideas" :key="idea.id" :value="idea.id">{{ idea.title }}</option>
+          </select>
+        </div>
         <div class="modal-actions">
           <button class="btn btn-ghost" @click="showCreateModal = false">{{ $t('common.cancel') }}</button>
           <button class="btn btn-primary" @click="confirmCreate" :disabled="submitting || !newTaskTitle.trim()">{{ $t('common.confirm') }}</button>
@@ -272,6 +280,8 @@ const newTaskTitle = ref('')
 const newTaskDesc = ref('')
 const newTaskBranch = ref('')
 const newTaskPriority = ref(2)
+// F-260619-01:关联灵感(空串=不关联,与后端 idea_id 空串处理一致)
+const newTaskIdeaId = ref('')
 const submitting = ref(false)
 
 interface TaskGroup {
@@ -355,6 +365,7 @@ function openCreateModal() {
   newTaskDesc.value = ''
   newTaskBranch.value = ''
   newTaskPriority.value = 2
+  newTaskIdeaId.value = ''
   showCreateModal.value = true
 }
 
@@ -368,6 +379,8 @@ async function confirmCreate() {
       description: newTaskDesc.value.trim(),
       branch_name: newTaskBranch.value.trim() || undefined,
       priority: newTaskPriority.value,
+      // F-260619-01:空串=不关联(对齐后端 idea_id 空串语义)
+      idea_id: newTaskIdeaId.value.trim() || undefined,
     })
     if (!r) return
     showCreateModal.value = false
@@ -434,6 +447,8 @@ onMounted(async () => {
     await Promise.all([
       store.loadProjects(),
       store.loadTasks(),
+      // F-260619-01:加载灵感供新建任务模态关联下拉选择(幂等,已加载则 no-op)
+      store.loadIdeas(),
       taskApi.count().then(n => totalTasks.value = n),
     ])
   } finally {