迁移 Flutter 端与训练脚本，模型/训练产物移出 git（遵循纯代码约定）

flutter_app/lib/auth/auth_screen.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:provider/provider.dart';
+
+import 'auth_view_model.dart';
+
+/// 登录/注册页：手机号 + 密码；注册成功后自动登录。
+class AuthScreen extends StatefulWidget {
+  const AuthScreen({super.key});
+
+  @override
+  State<AuthScreen> createState() => _AuthScreenState();
+}
+
+class _AuthScreenState extends State<AuthScreen> {
+  final _phoneCtrl = TextEditingController();
+  final _passwordCtrl = TextEditingController();
+  bool _obscure = true;
+
+  @override
+  void dispose() {
+    _phoneCtrl.dispose();
+    _passwordCtrl.dispose();
+    super.dispose();
+  }
+
+  static final _phoneRe = RegExp(r'^1[3-9]\d{9}$');
+
+  Future<void> _submit() async {
+    final vm = context.read<AuthViewModel>();
+    final phone = _phoneCtrl.text.trim();
+    final password = _passwordCtrl.text;
+    if (!_phoneRe.hasMatch(phone)) {
+      vm.showError('请输入正确的 11 位手机号');
+      return;
+    }
+    if (password.length < 6) {
+      vm.showError('密码至少 6 位');
+      return;
+    }
+    final ok = await vm.submit(phone: phone, password: password);
+    if (ok && mounted) {
+      Navigator.of(context).pushReplacementNamed('/home');
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final vm = context.watch<AuthViewModel>();
+    final isLogin = vm.mode == AuthMode.login;
+
+    return Scaffold(
+      body: SafeArea(
+        child: Center(
+          child: SingleChildScrollView(
+            padding: const EdgeInsets.symmetric(horizontal: 32),
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                const Icon(Icons.pets, size: 64, color: Colors.green),
+                const SizedBox(height: 12),
+                const Text(
+                  '视野',
+                  textAlign: TextAlign.center,
+                  style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold),
+                ),
+                const SizedBox(height: 4),
+                Text(
+                  '野生动物实时识别',
+                  textAlign: TextAlign.center,
+                  style: TextStyle(color: Colors.grey.shade600),
+                ),
+                const SizedBox(height: 32),
+                TextField(
+                  controller: _phoneCtrl,
+                  keyboardType: TextInputType.phone,
+                  maxLength: 11,
+                  inputFormatters: [FilteringTextInputFormatter.digitsOnly],
+                  decoration: const InputDecoration(
+                    labelText: '手机号',
+                    prefixIcon: Icon(Icons.phone_android),
+                    border: OutlineInputBorder(),
+                    counterText: '',
+                  ),
+                ),
+                const SizedBox(height: 16),
+                TextField(
+                  controller: _passwordCtrl,
+                  obscureText: _obscure,
+                  maxLength: 64,
+                  decoration: InputDecoration(
+                    labelText: '密码',
+                    prefixIcon: const Icon(Icons.lock_outline),
+                    border: const OutlineInputBorder(),
+                    counterText: '',
+                    suffixIcon: IconButton(
+                      icon: Icon(_obscure ? Icons.visibility_off : Icons.visibility),
+                      onPressed: () => setState(() => _obscure = !_obscure),
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 24),
+                FilledButton(
+                  onPressed: vm.loading ? null : _submit,
+                  style: FilledButton.styleFrom(
+                    minimumSize: const Size.fromHeight(48),
+                  ),
+                  child: vm.loading
+                      ? const SizedBox(
+                          width: 22,
+                          height: 22,
+                          child: CircularProgressIndicator(strokeWidth: 2),
+                        )
+                      : Text(isLogin ? '登录' : '注册并登录'),
+                ),
+                const SizedBox(height: 12),
+                TextButton(
+                  onPressed: vm.loading ? null : vm.switchMode,
+                  child: Text(isLogin ? '没有账号？去注册' : '已有账号？去登录'),
+                ),
+                if (vm.error != null) ...[
+                  const SizedBox(height: 12),
+                  Text(
+                    vm.error!,
+                    textAlign: TextAlign.center,
+                    style: const TextStyle(color: Colors.red),
+                  ),
+                ],
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

flutter_app/lib/auth/auth_view_model.dart

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+import 'package:flutter/foundation.dart';
+
+import '../payment/order_api.dart';
+import 'session_store.dart';
+
+enum AuthMode { login, register }
+
+class AuthViewModel extends ChangeNotifier {
+  final OrderApi orderApi;
+  final SessionStore sessionStore;
+
+  AuthMode _mode = AuthMode.login;
+  bool _loading = false;
+  String? _error;
+
+  AuthMode get mode => _mode;
+  bool get loading => _loading;
+  String? get error => _error;
+
+  AuthViewModel({required this.orderApi, required this.sessionStore});
+
+  void switchMode() {
+    _mode = _mode == AuthMode.login ? AuthMode.register : AuthMode.login;
+    _error = null;
+    notifyListeners();
+  }
+
+  /// 本地输入校验失败提示（不进网络请求）
+  void showError(String message) {
+    _error = message;
+    notifyListeners();
+  }
+
+  /// 登录或注册；成功返回 true（调用方负责跳转主界面）
+  Future<bool> submit({required String phone, required String password}) async {
+    _loading = true;
+    _error = null;
+    notifyListeners();
+    try {
+      if (_mode == AuthMode.login) {
+        final token = await orderApi.login(phone: phone, password: password);
+        await sessionStore.save(phone, token);
+      } else {
+        await orderApi.register(phone: phone, password: password);
+        final token = await orderApi.login(phone: phone, password: password);
+        await sessionStore.save(phone, token);
+      }
+      return true;
+    } on OrderApiException catch (e) {
+      _error = e.message;
+      return false;
+    } finally {
+      _loading = false;
+      notifyListeners();
+    }
+  }
+}

flutter_app/lib/auth/session_store.dart

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+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+/// 登录会话持久化：token + 手机号存 secure storage。
+/// 启动时读取判断是否已登录；登出/401 时清除回登录页。
+class SessionStore {
+  static const _storage = FlutterSecureStorage();
+  static const _tokenKey = 'auth_token';
+  static const _phoneKey = 'auth_phone';
+
+  static String? _cachedToken;
+  static String? _cachedPhone;
+
+  Future<String?> readToken() async {
+    if (_cachedToken != null) return _cachedToken;
+    return _cachedToken = await _storage.read(key: _tokenKey);
+  }
+
+  Future<String?> readPhone() async {
+    if (_cachedPhone != null) return _cachedPhone;
+    return _cachedPhone = await _storage.read(key: _phoneKey);
+  }
+
+  Future<void> save(String phone, String token) async {
+    _cachedPhone = phone;
+    _cachedToken = token;
+    await _storage.write(key: _phoneKey, value: phone);
+    await _storage.write(key: _tokenKey, value: token);
+  }
+
+  Future<void> clear() async {
+    _cachedPhone = null;
+    _cachedToken = null;
+    await _storage.delete(key: _phoneKey);
+    await _storage.delete(key: _tokenKey);
+  }
+}