feat: 企微通讯录选人替换手填 userid（项目负责人/总群成员/群主合作方）

- wecom-client 新增 listInternalContacts：department/list + 逐部门 user/simplelist（cursor 翻页、去重、部门名映射）
- 新 action wecom_list_internal_contacts（仅返回应用可见范围内成员）
- admin 新增 WecomUserPickerModal：单选点行填入/多选勾选合并，姓名+userid 搜索，5 分钟共享缓存
- 三处接线：项目负责人（单选）、项目总群成员（多选合并去重）、新建群主合作方（单选）
- 拉取失败（60020 等）提示手填兜底，手填路径不变

app/admin-app.tsx

@@ -1596,6 +1596,7 @@ function PartnersPage({
   const [createOpen, setCreateOpen] = useState(false);
   const [createDraft, setCreateDraft] = useState({ name: "", wecomUserid: "" });
   const [createSaving, setCreateSaving] = useState(false);
+  const [userPickerOpen, setUserPickerOpen] = useState(false);
 
   const filteredPartners = useMemo(
     () =>
@@ -2144,16 +2145,26 @@ function PartnersPage({
               </label>
               <label>
                 <span>企业微信 userid *</span>
-                <input
-                  value={createDraft.wecomUserid}
-                  onChange={(event) => setCreateDraft({ ...createDraft, wecomUserid: event.target.value })}
-                  placeholder="例如：zhangsan"
-                />
+                <div className="field-with-action">
+                  <input
+                    value={createDraft.wecomUserid}
+                    onChange={(event) => setCreateDraft({ ...createDraft, wecomUserid: event.target.value })}
+                    placeholder="例如：zhangsan"
+                  />
+                  <button
+                    type="button"
+                    className="ghost-button"
+                    onClick={() => setUserPickerOpen(true)}
+                    disabled={createSaving}
+                  >
+                    从企微选择
+                  </button>
+                </div>
               </label>
             </div>
             <p className="project-chat-hint">
-              userid 在企业微信管理后台「通讯录」成员详情中查看。群主合作方是内部员工，
-              用于在任务中心的项目分组中把任务群映射到负责人。
+              可从企业微信通讯录选择，或手动填写 userid（在企业微信管理后台「通讯录」成员详情中查看）。
+              群主合作方是内部员工，用于在任务中心的项目分组中把任务群映射到负责人。
             </p>
             <div className="modal-actions">
               <button type="button" className="ghost-button" onClick={() => setCreateOpen(false)} disabled={createSaving}>取消</button>
@@ -2164,6 +2175,22 @@ function PartnersPage({
           </div>
         </div>
       )}
+      {userPickerOpen && (
+        <WecomUserPickerModal
+          mode="single"
+          selected={
+            createDraft.wecomUserid.trim() ? [createDraft.wecomUserid.trim()] : []
+          }
+          onClose={() => setUserPickerOpen(false)}
+          onConfirm={(userids) => {
+            setCreateDraft((previous) => ({
+              ...previous,
+              wecomUserid: userids[0] ?? "",
+            }));
+            setUserPickerOpen(false);
+          }}
+        />
+      )}
       {pickerPartner && (
         <div className="modal-backdrop" role="presentation" onMouseDown={closePicker}>
           <div className="modal-card wecom-picker-modal" onMouseDown={(event) => event.stopPropagation()}>
@@ -2883,6 +2910,223 @@ function ProjectSection({
   );
 }
 
+type InternalWecomContact = {
+  userid: string;
+  name: string;
+  departmentNames: string[];
+};
+
+let internalWecomContactsCache: {
+  contacts: InternalWecomContact[];
+  fetchedAt: number;
+} | null = null;
+
+const INTERNAL_WECOM_CONTACTS_TTL_MS = 5 * 60 * 1000;
+
+function WecomUserPickerModal({
+  mode,
+  selected,
+  onClose,
+  onConfirm,
+}: {
+  mode: "single" | "multi";
+  selected: string[];
+  onClose: () => void;
+  onConfirm: (userids: string[]) => void;
+}) {
+  const [contacts, setContacts] = useState<InternalWecomContact[]>(
+    internalWecomContactsCache?.contacts ?? [],
+  );
+  const [fetchedAt, setFetchedAt] = useState(0);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState("");
+  const [search, setSearch] = useState("");
+  const [checked, setChecked] = useState<string[]>(selected.filter(Boolean));
+
+  const loadContacts = useCallback(async (force = false) => {
+    const snapshot = internalWecomContactsCache;
+    if (
+      !force &&
+      snapshot &&
+      Date.now() - snapshot.fetchedAt <= INTERNAL_WECOM_CONTACTS_TTL_MS
+    ) {
+      setContacts(snapshot.contacts);
+      setFetchedAt(snapshot.fetchedAt);
+      setLoading(false);
+      return;
+    }
+    setLoading(true);
+    setError("");
+    try {
+      const response = await fetch("/api/action", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ action: "wecom_list_internal_contacts" }),
+      });
+      const parsed = await readApiResponse<{
+        contacts?: InternalWecomContact[];
+        error?: string;
+      }>(response, "获取企业微信通讯录失败");
+      if (!response.ok) {
+        throw new Error(parsed.error || "获取企业微信通讯录失败");
+      }
+      const list = Array.isArray(parsed.contacts) ? parsed.contacts : [];
+      internalWecomContactsCache = { contacts: list, fetchedAt: Date.now() };
+      setContacts(list);
+      setFetchedAt(internalWecomContactsCache.fetchedAt);
+    } catch (reason) {
+      setError(
+        reason instanceof Error ? reason.message : "获取企业微信通讯录失败",
+      );
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    const timer = window.setTimeout(() => {
+      void loadContacts();
+    }, 0);
+    return () => window.clearTimeout(timer);
+  }, [loadContacts]);
+
+  const keyword = search.trim().toLowerCase();
+  const filteredContacts =
+    keyword.length === 0
+      ? contacts
+      : contacts.filter((contact) =>
+          `${contact.name} ${contact.userid}`.toLowerCase().includes(keyword),
+        );
+
+  const toggleChecked = (userid: string) => {
+    setChecked((previous) =>
+      previous.includes(userid)
+        ? previous.filter((item) => item !== userid)
+        : [...previous, userid],
+    );
+  };
+
+  return (
+    <div className="modal-backdrop" role="presentation" onMouseDown={onClose}>
+      <div
+        className="modal-card wecom-picker-modal"
+        onMouseDown={(event) => event.stopPropagation()}
+      >
+        <div className="modal-heading">
+          <div>
+            <h2>选择企业微信成员</h2>
+            <p>
+              从企业微信通讯录（自建应用可见范围）中挑选，
+              {mode === "multi" ? "勾选后点击确定" : "点击成员即填入"}。
+            </p>
+          </div>
+          <button type="button" onClick={onClose} aria-label="关闭">×</button>
+        </div>
+        <div className="import-guide-strip">
+          <input
+            type="search"
+            className="wecom-picker-search"
+            placeholder="按姓名 / userid 搜索"
+            value={search}
+            onChange={(event) => setSearch(event.target.value)}
+            disabled={loading}
+          />
+          <button
+            type="button"
+            className="ghost-button"
+            onClick={() => void loadContacts(true)}
+            disabled={loading}
+          >
+            {loading ? "拉取中…" : "刷新列表"}
+          </button>
+          {fetchedAt > 0 && !loading && (
+            <span className="wecom-picker-cache-hint">
+              缓存于 {new Date(fetchedAt).toLocaleTimeString()}（5 分钟内复用）
+            </span>
+          )}
+        </div>
+        {error && (
+          <p className="form-error">
+            {error} 可关闭此弹窗，直接在输入框手动填写 userid。
+          </p>
+        )}
+        <div className="wecom-picker-list">
+          {loading && contacts.length === 0 ? (
+            <div className="wecom-picker-empty">正在拉取企业微信通讯录…</div>
+          ) : contacts.length === 0 ? (
+            <div className="wecom-picker-empty">
+              {error
+                ? "拉取失败，请检查应用配置（通讯录权限 / 可信 IP）后重试"
+                : "未拉取到通讯录成员——仅显示自建应用可见范围内的成员，也可手动填写 userid"}
+            </div>
+          ) : filteredContacts.length === 0 ? (
+            <div className="wecom-picker-empty">没有匹配的成员</div>
+          ) : (
+            filteredContacts.map((contact) => {
+              const isSelected =
+                mode === "multi"
+                  ? checked.includes(contact.userid)
+                  : selected.includes(contact.userid);
+              const rowBody = (
+                <>
+                  <span className="wecom-picker-avatar placeholder" aria-hidden="true">
+                    {(contact.name || contact.userid).slice(0, 1)}
+                  </span>
+                  <span className="wecom-picker-meta">
+                    <span className="wecom-picker-name">
+                      {contact.name || contact.userid}
+                    </span>
+                    <span className="wecom-picker-sub">
+                      {contact.departmentNames.join(" / ") || "—"}
+                    </span>
+                    <code className="wecom-picker-id">{contact.userid}</code>
+                  </span>
+                </>
+              );
+              return mode === "multi" ? (
+                <label key={contact.userid} className="wecom-picker-row">
+                  {rowBody}
+                  <input
+                    type="checkbox"
+                    checked={isSelected}
+                    onChange={() => toggleChecked(contact.userid)}
+                  />
+                </label>
+              ) : (
+                <button
+                  key={contact.userid}
+                  type="button"
+                  className="wecom-picker-row"
+                  onClick={() => onConfirm([contact.userid])}
+                >
+                  {rowBody}
+                  {isSelected ? (
+                    <span className="wecom-picker-current">当前</span>
+                  ) : null}
+                </button>
+              );
+            })
+          )}
+        </div>
+        {mode === "multi" && (
+          <div className="modal-actions">
+            <button type="button" className="ghost-button" onClick={onClose}>
+              取消
+            </button>
+            <button
+              type="button"
+              className="primary-button"
+              onClick={() => onConfirm(checked)}
+            >
+              {checked.length > 0 ? `确定（${checked.length} 人）` : "确定"}
+            </button>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
 function ProjectEditorModal({
   draft,
   saving,
@@ -2896,6 +3140,12 @@ function ProjectEditorModal({
   onClose: () => void;
   onSave: () => void;
 }) {
+  const [picker, setPicker] = useState<null | "owner" | "members">(null);
+  const memberLines = () =>
+    draft.members
+      .split("\n")
+      .map((line) => line.trim())
+      .filter(Boolean);
   return (
     <div className="modal-backdrop" role="presentation" onMouseDown={onClose}>
       <div className="modal-card" onMouseDown={(event) => event.stopPropagation()}>
@@ -2927,11 +3177,21 @@ function ProjectEditorModal({
         </div>
         <label>
           <span>项目负责人 userid</span>
-          <input
-            value={draft.owner}
-            onChange={(event) => onChange({ ...draft, owner: event.target.value })}
-            placeholder="例如：zhangsan"
-          />
+          <div className="field-with-action">
+            <input
+              value={draft.owner}
+              onChange={(event) => onChange({ ...draft, owner: event.target.value })}
+              placeholder="例如：zhangsan"
+            />
+            <button
+              type="button"
+              className="ghost-button"
+              onClick={() => setPicker("owner")}
+              disabled={saving}
+            >
+              从企微选择
+            </button>
+          </div>
           <small>任务群创建时自动把负责人拉进群；请确保该成员在自建应用可见范围内。</small>
         </label>
         <label>
@@ -2942,8 +3202,16 @@ function ProjectEditorModal({
             onChange={(event) => onChange({ ...draft, members: event.target.value })}
             placeholder={"zhangsan\nlisi\nwangwu"}
           />
-          <small>userid 在企业微信管理后台「通讯录」成员详情中查看；推送任务时会逐人发送应用消息。</small>
+          <small>推送任务时会逐人发送应用消息；可从企业微信通讯录选择或手动填写。</small>
         </label>
+        <button
+          type="button"
+          className="ghost-button"
+          onClick={() => setPicker("members")}
+          disabled={saving}
+        >
+          从企微选择总群成员
+        </button>
         <label>
           <span>备注</span>
           <textarea
@@ -2960,6 +3228,32 @@ function ProjectEditorModal({
           </button>
         </div>
       </div>
+      {picker === "owner" && (
+        <WecomUserPickerModal
+          mode="single"
+          selected={draft.owner ? [draft.owner.trim()] : []}
+          onClose={() => setPicker(null)}
+          onConfirm={(userids) => {
+            onChange({ ...draft, owner: userids[0] ?? "" });
+            setPicker(null);
+          }}
+        />
+      )}
+      {picker === "members" && (
+        <WecomUserPickerModal
+          mode="multi"
+          selected={memberLines()}
+          onClose={() => setPicker(null)}
+          onConfirm={(userids) => {
+            const merged = [...memberLines()];
+            for (const userid of userids) {
+              if (!merged.includes(userid)) merged.push(userid);
+            }
+            onChange({ ...draft, members: merged.join("\n") });
+            setPicker(null);
+          }}
+        />
+      )}
     </div>
   );
 }