feat(dev-task): 开发任务模块 V1 完整实现

- 核心库：dev-task.ts（类型+状态机+进度计算）、task-worklog.ts（工时）、task-category.ts（字典）、work-item.ts（聚合契约）
- Store：useDevTaskStore（CRUD+状态流转）、useTaskWorklogStore（工时记录）、useTaskCategoryStore（字典管理）
- UI组件：DevTaskTab、DevTaskCreateModal、DevTaskDetailDrawer、DevTaskRow、WorklogPanel、StatusBadge、CategoryChip
- 集成：版本详情页"开发任务"Tab、"与我相关"工作台开发任务分组、任务类型管理页
- 设计文档：spec + 实施计划

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/app/admin/categories/page.tsx

@@ -0,0 +1,73 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { Plus, Pencil, Trash2, Shield } from 'lucide-react';
+import { useTaskCategoryStore } from '@/stores/useTaskCategoryStore';
+import { CATEGORY_GROUP_LABEL } from '@/lib/task-category';
+import type { CategoryGroup } from '@/lib/task-category';
+
+export default function CategoriesPage() {
+  const { categories, fetchCategories, addCategory, updateCategory, deleteCategory } = useTaskCategoryStore();
+  useEffect(() => { fetchCategories(); }, [fetchCategories]);
+
+  const [newName, setNewName] = useState('');
+  const [newGroup, setNewGroup] = useState<CategoryGroup>('development');
+  const [editingId, setEditingId] = useState<string | null>(null);
+  const [editName, setEditName] = useState('');
+
+  const groups: CategoryGroup[] = ['development', 'testing', 'implementation', 'other'];
+
+  const handleAdd = () => {
+    if (!newName.trim()) return;
+    addCategory(newName.trim(), newGroup);
+    setNewName('');
+  };
+
+  const handleSaveEdit = (id: string) => {
+    if (editName.trim()) updateCategory(id, { name: editName.trim() });
+    setEditingId(null);
+  };
+
+  return (
+    <div className="p-6 max-w-2xl mx-auto space-y-6">
+      <h1 className="text-[16px] font-semibold text-[var(--ink)]">任务类型管理</h1>
+
+      <div className="flex gap-2">
+        <input value={newName} onChange={(e) => setNewName(e.target.value)} onKeyDown={(e) => { if (e.key === 'Enter') handleAdd(); }} placeholder="新类型名称" className="flex-1 h-9 rounded-lg border border-[var(--line)] px-3 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
+        <select value={newGroup} onChange={(e) => setNewGroup(e.target.value as CategoryGroup)} className="h-9 rounded-lg border border-[var(--line)] px-3 text-[13px]">
+          {groups.map((g) => <option key={g} value={g}>{CATEGORY_GROUP_LABEL[g]}</option>)}
+        </select>
+        <button onClick={handleAdd} className="h-9 px-4 rounded-lg text-[12px] font-medium bg-[var(--accent)] text-white hover:bg-[var(--accent-hover)]"><Plus className="h-3.5 w-3.5 inline mr-1" />添加</button>
+      </div>
+
+      {groups.map((g) => {
+        const items = categories.filter((c) => c.group === g);
+        if (items.length === 0) return null;
+        return (
+          <div key={g}>
+            <h2 className="text-[13px] font-medium text-[var(--ink-soft)] mb-2">{CATEGORY_GROUP_LABEL[g]}</h2>
+            <div className="rounded-lg border border-[var(--line)] divide-y divide-[var(--line)]">
+              {items.map((cat) => (
+                <div key={cat.id} className="flex items-center gap-3 px-4 py-2.5">
+                  {cat.color && <span className="h-3 w-3 rounded-full shrink-0" style={{ backgroundColor: cat.color }} />}
+                  {editingId === cat.id ? (
+                    <input value={editName} onChange={(e) => setEditName(e.target.value)} onBlur={() => handleSaveEdit(cat.id)} onKeyDown={(e) => { if (e.key === 'Enter') handleSaveEdit(cat.id); }} autoFocus className="flex-1 h-7 rounded border border-[var(--line)] px-2 text-[13px] focus:border-[var(--accent)] focus:outline-none" />
+                  ) : (
+                    <span className="flex-1 text-[13px] text-[var(--ink)]">{cat.name}</span>
+                  )}
+                  {cat.isSystem && <span title="系统预置"><Shield className="h-3 w-3 text-[var(--ink-muted)]" /></span>}
+                  {!cat.isSystem && (
+                    <>
+                      <button onClick={() => { setEditingId(cat.id); setEditName(cat.name); }} className="p-1 rounded hover:bg-[var(--bg-subtle)]"><Pencil className="h-3 w-3 text-[var(--ink-muted)]" /></button>
+                      <button onClick={() => deleteCategory(cat.id)} className="p-1 rounded hover:bg-red-50"><Trash2 className="h-3 w-3 text-[var(--ink-muted)] hover:text-red-500" /></button>
+                    </>
+                  )}
+                </div>
+              ))}
+            </div>
+          </div>
+        );
+      })}
+    </div>
+  );
+}