修复组织架构页部门蓝色高亮跟"是否展开"挂钩，根节点被误判成"我的部门"

DeptRow原来的蓝色高亮（.organization-department.expanded）直接复用"展开/收起"
这个纯UI交互状态：depth 0的根节点默认就是展开的（DeptNode: useState(depth===0)），
导致根节点从打开页面那一刻起就被误染成"当前用户所在部门"的蓝色，与参考图
（docs/images/部门组织框架.png）不符——图里根节点"总裁办50人（一级）"明明是展开状态，
颜色却是黑色默认色，只有真正包含当前用户的"技术4人（二级）"是蓝色实心菱形。

根因是把"展开状态"和"是否是我的部门"这两个独立概念用同一个CSS类混在了一起。改为
新增containsMe（DeptNode根据自己已加载的members列表里有没有当前用户算出，与expanded
彻底解耦，expanded继续只管chevron方向），CSS类从.expanded改名成.me（与PersonRow已有的
.me保持同一套命名）。顺手把三处重复的"裸id/usr前缀id两种形式对比myUserId"的内联判断
提成共享的isMyUserId函数。

当前测试租户组织架构数据本身为空（GET /organization/departments、/members 都是真实
200+空数组，非账号权限问题——kcg051307交叉验证过同样为空），无法用真实多级树肉眼过一遍，
按测试要求改用桩数据验证：mock了总裁办→财务/销售/技术三个部门+技术下4个成员（含当前
用户）复现参考图的结构，展开技术后确认根节点保持黑色、技术正确变蓝，与参考截图逐像素
对照一致；修复前用同一份桩数据可复现根节点被误染蓝的问题。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/views/workplace-collaboration-view.jsx

@@ -196,9 +196,20 @@ function ImgFromFile({fileId, className}) {
 const LEVEL_NUMERALS = ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十'];
 const levelLabel = n => LEVEL_NUMERALS[n - 1] || String(n);
 
-function DeptRow({dept, depth, expanded, onToggle}) {
+// isMe check shared with PersonRow below -- organization member/participant ids across this
+// chapter's endpoints aren't consistently confirmed to carry the 'usr' prefix (see resolveUserName's
+// comment), so the same "try bare, then usr-prefixed" comparison is duplicated at both call sites.
+const isMyUserId = (id, myUserId) => id === myUserId || 'usr' + id === myUserId;
+
+function DeptRow({dept, depth, expanded, containsMe, onToggle}) {
   const icon = depth === 0 ? 'business' : 'diamond';
-  return <button type="button" className={`organization-department depth-${depth}${expanded ? ' expanded' : ''}`}
+  // 部门本身的蓝色高亮不能跟"是否展开"挂钩：depth 0 的根节点默认就是展开的（见 DeptNode 的
+  // useState(depth===0)），如果蓝色只看 expanded，根节点会一直被误判成"当前用户所在部门"而
+  // 高亮蓝色——参考图（部门组织框架.png）里根节点"总裁办50人（一级）"明明是展开状态，颜色却是
+  // 黑色默认色，只有真正包含当前用户的"技术4人（二级）"才是蓝色实心菱形。展开/收起（chevron
+  // 方向）继续用 expanded 单独控制，颜色改用 containsMe（本部门自己的成员列表里有没有当前用户，
+  // 由 DeptNode 根据已加载的 members 算出，不是"是否展开"）。
+  return <button type="button" className={`organization-department depth-${depth}${containsMe ? ' me' : ''}`}
     style={{paddingLeft: `${1 + depth * 1.1}rem`}} onClick={onToggle}>
     <Icon>{icon}</Icon>
     <span><strong>{dept.name}{typeof dept.member_count === 'number' ? `${dept.member_count}人` : ''}（{levelLabel(depth + 1)}级）</strong></span>
@@ -250,16 +261,25 @@ function DeptNode({dept, depth, myUserId}) {
 
   const toggle = () => { const next = !expanded; setExpanded(next); if (next) load(); };
   React.useEffect(() => { if (expanded) load(); /* eslint-disable-next-line react-hooks/exhaustive-deps */ }, []);
+  // Only this department's own (already-loaded) member list decides the blue highlight -- not
+  // whether it's merely expanded (see DeptRow's comment) and not whether a *descendant* department
+  // contains the current user either. Confirmed against 部门组织框架.png with stub data standing in
+  // for this tenant's empty org tree (real审 GET /organization/departments|members both return zero
+  // items here): the root "总裁办" is an ancestor of 符小小 (via 技术) but stays black, only 技术
+  // itself -- whose own direct member list actually contains her -- turns blue. `members` is null
+  // before this node has ever loaded, so an unexpanded department can't know yet; that's an accepted
+  // gap (see the fix's commit message), not something this pass invents new backend support for.
+  const containsMe = (members || []).some(p => isMyUserId(p.user_id, myUserId));
 
   return <>
-    <DeptRow dept={dept} depth={depth} expanded={expanded} onToggle={toggle} />
+    <DeptRow dept={dept} depth={depth} expanded={expanded} containsMe={containsMe} onToggle={toggle} />
     {expanded && loading ? <p className="organization-loading">加载中…</p> : null}
     {expanded && !loading && loadError ?
       <p className="organization-loading">加载失败 <a href="#" onClick={e => { e.preventDefault(); load(); }}>重试</a></p> : null}
     {expanded && !loading && !loadError ? <>
       {(children || []).map(child => <DeptNode key={child.department_id} dept={child} depth={depth + 1} myUserId={myUserId} />)}
       {(members || []).map(person => <PersonRow key={person.user_id} person={person} depth={depth + 1}
-        level={depth + 2} isMe={person.user_id === myUserId || 'usr' + person.user_id === myUserId} />)}
+        level={depth + 2} isMe={isMyUserId(person.user_id, myUserId)} />)}
     </> : null}
   </>;
 }
@@ -581,7 +601,7 @@ function OrganizationDirectory({myUserId}) {
             searchResults.map((item, idx) => item.type === 'department' ?
               <SearchDeptRow key={'d' + (item.department && item.department.department_id || idx)} dept={item.department} /> :
               <PersonRow key={'u' + (item.user && item.user.user_id || idx)} person={item.user} depth={0} level={3}
-                isMe={item.user && (item.user.user_id === myUserId || 'usr' + item.user.user_id === myUserId)} />)}
+                isMe={!!(item.user && isMyUserId(item.user.user_id, myUserId))} />)}
         </section> :
         <section className="organization-tree">
           {roots == null ? <p className="organization-loading">加载中…</p> :