fix(mobile-next): 登录失败改为顶部 toast，2 秒后自动消失

改 company_login_page.dart 与 company_login_logic.dart。
保留「工号或密码不正确」「网络异常，请稍后重试」；去掉按钮下方常驻错误字。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile-next/lib/company/auth/company_login_logic.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:openim/core/controller/im_controller.dart';
@@ -15,12 +17,14 @@ class CompanyLoginLogic extends GetxController {
   final staffError = RxnString();
   final pwdError = RxnString();
   final toast = RxnString();
+  Timer? _toastTimer;
 
   final _auth = AuthApi();
   final _im = Get.find<IMController>();
 
   @override
   void onClose() {
+    _toastTimer?.cancel();
     staffCtrl.dispose();
     pwdCtrl.dispose();
     super.onClose();
@@ -28,6 +32,14 @@ class CompanyLoginLogic extends GetxController {
 
   void toggleObscure() => obscure.toggle();
 
+  void _showToast(String msg) {
+    toast.value = msg;
+    _toastTimer?.cancel();
+    _toastTimer = Timer(const Duration(seconds: 2), () {
+      toast.value = null;
+    });
+  }
+
   Future<void> submit() async {
     if (submitting.value) return;
     final staffNo = staffCtrl.text.trim();
@@ -58,10 +70,10 @@ class CompanyLoginLogic extends GetxController {
       Get.find<CacheController>().resetCache();
       AppNavigator.startMain(conversations: conversations);
     } on AuthException catch (e) {
-      toast.value = e.network ? '网络异常，请稍后重试' : '工号或密码不正确';
+      _showToast(e.network ? '网络异常，请稍后重试' : '工号或密码不正确');
     } catch (e, s) {
       Logger.print('company login e: $e $s');
-      toast.value = '网络异常，请稍后重试';
+      _showToast('网络异常，请稍后重试');
     } finally {
       submitting.value = false;
     }

mobile-next/lib/company/ui/company_login_page.dart

@@ -16,77 +16,94 @@ class CompanyLoginPage extends StatelessWidget {
     final logic = Get.find<CompanyLoginLogic>();
     return Scaffold(
       backgroundColor: AppColors.pageBg,
-      body: SafeArea(
+      body: Stack(
-        child: LayoutBuilder(
+        children: [
-          builder: (context, constraints) {
+          SafeArea(
-            return SingleChildScrollView(
+            child: LayoutBuilder(
-              padding: const EdgeInsets.symmetric(horizontal: AppGap.x8),
+              builder: (context, constraints) {
-              child: ConstrainedBox(
+                return SingleChildScrollView(
-                constraints: BoxConstraints(minHeight: constraints.maxHeight),
+                  padding: const EdgeInsets.symmetric(horizontal: AppGap.x8),
-                child: IntrinsicHeight(
+                  child: ConstrainedBox(
-                  child: Column(
+                    constraints: BoxConstraints(minHeight: constraints.maxHeight),
-                    children: [
+                    child: IntrinsicHeight(
-                      const Spacer(flex: 2),
+                      child: Column(
-                      _logo(),
+                        children: [
-                      const SizedBox(height: AppGap.x4),
+                          const Spacer(flex: 2),
-                      Text(
+                          _logo(),
-                        FeatureFlags.brandMigration ? '畅联' : 'OpenIM',
+                          const SizedBox(height: AppGap.x4),
-                        style: const TextStyle(
+                          Text(
-                          fontSize: 22,
+                            FeatureFlags.brandMigration ? '畅联' : 'OpenIM',
-                          fontWeight: FontWeight.w700,
+                            style: const TextStyle(
-                          color: AppColors.textPrimary,
+                              fontSize: 22,
-                        ),
+                              fontWeight: FontWeight.w700,
-                      ),
+                              color: AppColors.textPrimary,
-                      const SizedBox(height: AppGap.x1),
+                            ),
-                      const Text(
-                        '企业内部通讯',
-                        style: TextStyle(fontSize: AppFont.sub, color: AppColors.textSecondary),
-                      ),
-                      const SizedBox(height: AppGap.x8),
-                      Obx(() => _field(
-                            controller: logic.staffCtrl,
-                            hint: '请输入工号',
-                            icon: Icons.person_outline,
-                            error: logic.staffError.value,
-                            enabled: !logic.submitting.value,
-                          )),
-                      const SizedBox(height: AppGap.x3),
-                      Obx(() => _field(
-                            controller: logic.pwdCtrl,
-                            hint: '请输入密码',
-                            icon: Icons.lock_outline,
-                            obscure: logic.obscure.value,
-                            onToggleObscure: logic.toggleObscure,
-                            error: logic.pwdError.value,
-                            enabled: !logic.submitting.value,
-                            onSubmitted: (_) => logic.submit(),
-                          )),
-                      const SizedBox(height: AppGap.x4),
-                      Obx(() => _loginButton(logic)),
-                      const SizedBox(height: AppGap.x3),
-                      const Text(
-                        '登录即代表同意内部使用规范',
-                        style: TextStyle(fontSize: AppFont.small, color: AppColors.textSecondary),
-                      ),
-                      Obx(() {
-                        final msg = logic.toast.value;
-                        if (msg == null) return const SizedBox.shrink();
-                        return Padding(
-                          padding: const EdgeInsets.only(top: AppGap.x3),
-                          child: Text(
-                            msg,
-                            style: const TextStyle(fontSize: AppFont.sub, color: AppColors.danger),
                           ),
-                        );
+                          const SizedBox(height: AppGap.x1),
-                      }),
+                          const Text(
-                      const Spacer(flex: 3),
+                            '企业内部通讯',
-                    ],
+                            style: TextStyle(fontSize: AppFont.sub, color: AppColors.textSecondary),
+                          ),
+                          const SizedBox(height: AppGap.x8),
+                          Obx(() => _field(
+                                controller: logic.staffCtrl,
+                                hint: '请输入工号',
+                                icon: Icons.person_outline,
+                                error: logic.staffError.value,
+                                enabled: !logic.submitting.value,
+                              )),
+                          const SizedBox(height: AppGap.x3),
+                          Obx(() => _field(
+                                controller: logic.pwdCtrl,
+                                hint: '请输入密码',
+                                icon: Icons.lock_outline,
+                                obscure: logic.obscure.value,
+                                onToggleObscure: logic.toggleObscure,
+                                error: logic.pwdError.value,
+                                enabled: !logic.submitting.value,
+                                onSubmitted: (_) => logic.submit(),
+                              )),
+                          const SizedBox(height: AppGap.x4),
+                          Obx(() => _loginButton(logic)),
+                          const SizedBox(height: AppGap.x3),
+                          const Text(
+                            '登录即代表同意内部使用规范',
+                            style: TextStyle(fontSize: AppFont.small, color: AppColors.textSecondary),
+                          ),
+                          const Spacer(flex: 3),
+                        ],
+                      ),
+                    ),
+                  ),
+                );
+              },
+            ),
+          ),
+          Obx(() {
+            final msg = logic.toast.value;
+            if (msg == null) return const SizedBox.shrink();
+            return SafeArea(
+              child: Align(
+                alignment: Alignment.topCenter,
+                child: Padding(
+                  padding: const EdgeInsets.fromLTRB(AppGap.x4, AppGap.x2, AppGap.x4, 0),
+                  child: Material(
+                    color: AppColors.bannerBg,
+                    borderRadius: BorderRadius.circular(AppRadius.control),
+                    child: Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: AppGap.x4, vertical: AppGap.x3),
+                      child: Text(
+                        msg,
+                        textAlign: TextAlign.center,
+                        style: const TextStyle(fontSize: AppFont.sub, color: Colors.white),
+                      ),
+                    ),
                   ),
                 ),
               ),
             );
-          },
+          }),
-        ),
+        ],
       ),
     );
   }