Initial commit: 风影 OA 全栈源码（API/Web/Flutter/IM）

含 Phase 1.1 IM seq 排序、断线重连、多端已读同步与微信式语音转文字 UI。
排除 node_modules、构建产物、安装包与 .env 密钥。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/deptTree.ts

@@ -0,0 +1,76 @@
+export type DeptNode = {
+  id: string;
+  name: string;
+  code?: string | null;
+  parentId?: string | null;
+};
+
+function companyRootId(depts: DeptNode[]) {
+  const roots = depts.filter((d) => !d.parentId);
+  const named = roots.find((d) => d.name?.includes('公司') || d.code === 'ROOT' || d.code === 'OA_1');
+  return named?.id || roots[0]?.id;
+}
+
+export function isTopLevelDept(depts: DeptNode[], dept: DeptNode) {
+  const rootId = companyRootId(depts);
+  if (!rootId) return !dept.parentId;
+  if (dept.id === rootId) return false;
+  return dept.parentId === rootId || !dept.parentId;
+}
+
+export function topLevelDepartments(depts: DeptNode[]) {
+  return depts.filter((d) => isTopLevelDept(depts, d)).sort((a, b) => a.name.localeCompare(b.name, 'zh'));
+}
+
+export function topLevelOf(depts: DeptNode[], deptId?: string | null): DeptNode | undefined {
+  if (!deptId) return undefined;
+  const byId = new Map(depts.map((d) => [d.id, d]));
+  const rootId = companyRootId(depts);
+  let cur = byId.get(deptId);
+  const seen = new Set<string>();
+  while (cur && !seen.has(cur.id)) {
+    seen.add(cur.id);
+    if (isTopLevelDept(depts, cur)) return cur;
+    if (!cur.parentId || cur.parentId === rootId) return cur.id === rootId ? undefined : cur;
+    cur = byId.get(cur.parentId);
+  }
+  return undefined;
+}
+
+export function topLevelNameOf(depts: DeptNode[], deptId?: string | null, fallback?: string | null) {
+  return topLevelOf(depts, deptId)?.name || fallback || '';
+}
+
+export function topLevelNameByLeafName(depts: DeptNode[], name?: string | null) {
+  if (!name) return '';
+  const leaf = depts.find((d) => d.name === name);
+  if (!leaf) return name;
+  return topLevelOf(depts, leaf.id)?.name || name;
+}
+
+export function descendantIds(depts: DeptNode[], root?: string) {
+  if (!root) return null;
+  const kids = new Map<string, string[]>();
+  for (const d of depts) {
+    if (!d.parentId) continue;
+    const arr = kids.get(d.parentId) || [];
+    arr.push(d.id);
+    kids.set(d.parentId, arr);
+  }
+  const out = new Set<string>([root]);
+  const stack = [root];
+  while (stack.length) {
+    const id = stack.pop()!;
+    for (const c of kids.get(id) || []) {
+      if (!out.has(c)) {
+        out.add(c);
+        stack.push(c);
+      }
+    }
+  }
+  return out;
+}
+
+export function topLevelSelectOptions(depts: DeptNode[]) {
+  return topLevelDepartments(depts).map((d) => ({ value: d.id, label: d.name }));
+}