FE-PR-003/004/005: Mark existing Essential forms & Accept modal done; remove story from task creation

- FE-PR-003: Essential create/edit modal with type selector and partial refresh already implemented in ProposalDetailPage
- FE-PR-004: Accept modal with milestone selector and generated tasks display already implemented
- FE-PR-005: Remove 'story' from TASK_TYPES in CreateTaskPage and CreateTaskModal - all story/* must come from Proposal Accept workflow

plans/TASKLIST.md

@@ -208,21 +208,21 @@
   - [x] 展示 Essential type / code / title
   - [x] 处理空状态
 
-- [ ] FE-PR-003:新增 Essential 创建/编辑表单(frontend only)
-  - [ ] 创建表单
-  - [ ] 编辑表单
-  - [ ] type 选择器
-  - [ ] 提交后局部刷新
+- [x] FE-PR-003:新增 Essential 创建/编辑表单(frontend only)
+  - [x] 创建表单
+  - [x] 编辑表单
+  - [x] type 选择器
+  - [x] 提交后局部刷新
 
-- [ ] FE-PR-004:Proposal Accept 增加目标 Milestone 选择(frontend only)
-  - [ ] Accept 前展示 milestone 选择控件
-  - [ ] 校验必须选择 milestone
-  - [ ] 展示 Accept 成功后的生成结果
+- [x] FE-PR-004:Proposal Accept 增加目标 Milestone 选择(frontend only)
+  - [x] Accept 前展示 milestone 选择控件
+  - [x] 校验必须选择 milestone
+  - [x] 展示 Accept 成功后的生成结果
 
-- [ ] FE-PR-005:限制前端直接创建 `story/*`(frontend only)
-  - [ ] 从 Task 创建入口移除 story
-  - [ ] 或将 story 整体设为不可选
-  - [ ] 调整相关提示文案
+- [x] FE-PR-005:限制前端直接创建 `story/*`(frontend only)
+  - [x] 从 Task 创建入口移除 story
+  - [x] 或将 story 整体设为不可选
+  - [x] 调整相关提示文案
 
 ## G. HarborForge.Frontend - Calendar