feat: complete leave approval MVP

mobile/lib/features/form/presentation/leave_attachment_sheet.dart

@@ -0,0 +1,138 @@
+import 'package:aioa_mobile/features/form/application/leave_attachment_controller.dart';
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class LeaveAttachmentSheet extends ConsumerStatefulWidget {
+  const LeaveAttachmentSheet({required this.leaveRequestId, super.key});
+
+  final String leaveRequestId;
+
+  @override
+  ConsumerState<LeaveAttachmentSheet> createState() =>
+      _LeaveAttachmentSheetState();
+}
+
+class _LeaveAttachmentSheetState extends ConsumerState<LeaveAttachmentSheet> {
+  @override
+  void initState() {
+    super.initState();
+    Future.microtask(
+      () => ref
+          .read(leaveAttachmentProvider(widget.leaveRequestId).notifier)
+          .load(),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final state = ref.watch(leaveAttachmentProvider(widget.leaveRequestId));
+    return SafeArea(
+      child: Padding(
+        padding: EdgeInsets.fromLTRB(
+          20,
+          0,
+          20,
+          20 + MediaQuery.viewInsetsOf(context).bottom,
+        ),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            Text(
+              '添加附件',
+              style: Theme.of(
+                context,
+              ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.w700),
+            ),
+            const SizedBox(height: 6),
+            const Text('支持 JPEG、PNG、PDF，单个文件不超过 10 MB。文件将直接上传至对象存储。'),
+            if (state.error != null) ...[
+              const SizedBox(height: 10),
+              Text(
+                state.error!,
+                style: TextStyle(color: Theme.of(context).colorScheme.error),
+              ),
+            ],
+            if (state.uploading) ...[
+              const SizedBox(height: 14),
+              LinearProgressIndicator(value: state.progress),
+              const SizedBox(height: 6),
+              Text('正在上传 ${(state.progress * 100).round()}%'),
+            ],
+            if (state.items.isNotEmpty) ...[
+              const SizedBox(height: 14),
+              for (final item in state.items)
+                ListTile(
+                  contentPadding: EdgeInsets.zero,
+                  leading: Icon(
+                    item.contentType == 'application/pdf'
+                        ? Icons.picture_as_pdf_outlined
+                        : Icons.image_outlined,
+                  ),
+                  title: Text(
+                    item.fileName,
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                  ),
+                  subtitle: Text(
+                    '${_formatBytes(item.sizeBytes)} · ${item.status == 'READY' ? '已上传' : '处理中'}',
+                  ),
+                  trailing: item.status == 'READY'
+                      ? const Icon(Icons.check_circle, color: Colors.green)
+                      : null,
+                ),
+            ],
+            const SizedBox(height: 14),
+            OutlinedButton.icon(
+              onPressed: state.uploading ? null : _pickAndUpload,
+              icon: const Icon(Icons.attach_file),
+              label: const Padding(
+                padding: EdgeInsets.symmetric(vertical: 12),
+                child: Text('选择附件'),
+              ),
+            ),
+            const SizedBox(height: 8),
+            FilledButton(
+              onPressed: state.uploading ? null : () => Navigator.pop(context),
+              child: const Text('完成'),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Future<void> _pickAndUpload() async {
+    final result = await FilePicker.platform.pickFiles(
+      type: FileType.custom,
+      allowedExtensions: const ['jpg', 'jpeg', 'png', 'pdf'],
+      withData: true,
+    );
+    if (result == null || !mounted) return;
+    final file = result.files.single;
+    final bytes = file.bytes;
+    if (bytes == null) {
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('无法读取所选文件')));
+      return;
+    }
+    final contentType = switch (file.extension?.toLowerCase()) {
+      'jpg' || 'jpeg' => 'image/jpeg',
+      'png' => 'image/png',
+      'pdf' => 'application/pdf',
+      _ => null,
+    };
+    if (contentType == null) return;
+    await ref
+        .read(leaveAttachmentProvider(widget.leaveRequestId).notifier)
+        .upload(fileName: file.name, contentType: contentType, bytes: bytes);
+  }
+
+  String _formatBytes(int bytes) {
+    if (bytes < 1024) return '$bytes B';
+    if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
+    return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
+  }
+}

mobile/lib/features/form/presentation/leave_form_page.dart

@@ -1,8 +1,13 @@
 import 'dart:convert';
 
 import 'package:aioa_mobile/core/forms/presentation/dynamic_form_card.dart';
+import 'package:aioa_mobile/features/form/application/form_definition_controller.dart';
+import 'package:aioa_mobile/features/form/application/ai_leave_suggestion_provider.dart';
 import 'package:aioa_mobile/features/form/application/leave_draft_controller.dart';
-import 'package:aioa_mobile/features/form/domain/leave_form_definition.dart';
+import 'package:aioa_mobile/features/form/application/leave_submission_controller.dart';
+import 'package:aioa_mobile/features/form/data/form_definition_repository.dart';
+import 'package:aioa_mobile/features/form/data/ai_leave_suggestion_repository.dart';
+import 'package:aioa_mobile/features/form/presentation/leave_attachment_sheet.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
@@ -13,51 +18,154 @@ class LeaveFormPage extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final formState = ref.watch(leaveDraftProvider);
     final controller = ref.read(leaveDraftProvider.notifier);
+    final loadedDefinition = ref.watch(leaveFormDefinitionProvider);
+    final submission = ref.watch(leaveSubmissionProvider);
     return Scaffold(
-      appBar: AppBar(title: Text(leaveFormDefinition.dataSchema.title)),
-      body: ListView(
-        padding: const EdgeInsets.fromLTRB(16, 8, 16, 32),
-        children: [
-          _AiAssistCard(onApply: controller.applyAiSuggestion),
-          const SizedBox(height: 14),
-          DynamicFormCard(
-            definition: leaveFormDefinition,
-            state: formState,
-            onChanged: controller.setValue,
-          ),
-          const SizedBox(height: 8),
-          FilledButton.icon(
-            onPressed: () {
-              if (!controller.validate()) {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  const SnackBar(content: Text('请检查表单中的必填项和时间范围')),
-                );
-                return;
-              }
-              showModalBottomSheet<void>(
-                context: context,
-                showDragHandle: true,
-                builder: (context) => _ConfirmationSheet(
-                  values: ref.read(leaveDraftProvider).values,
-                ),
-              );
-            },
-            icon: const Icon(Icons.check_circle_outline),
-            label: const Padding(
-              padding: EdgeInsets.symmetric(vertical: 14),
-              child: Text('检查并确认'),
+      appBar: AppBar(title: const Text('请假申请')),
+      body: loadedDefinition.when(
+        loading: () => const Center(child: CircularProgressIndicator()),
+        error: (error, _) => Center(child: Text('表单定义加载失败：$error')),
+        data: (loaded) => ListView(
+          padding: const EdgeInsets.fromLTRB(16, 8, 16, 32),
+          children: [
+            _DefinitionSourceBanner(source: loaded.source),
+            if (formState.restoredAt != null) ...[
+              const SizedBox(height: 8),
+              _RestoredDraftBanner(onClear: controller.clear),
+            ],
+            const SizedBox(height: 8),
+            _AiAssistCard(onApply: controller.applySuggestion),
+            const SizedBox(height: 14),
+            DynamicFormCard(
+              definition: loaded.definition,
+              state: formState,
+              onChanged: controller.setValue,
             ),
-          ),
-        ],
+            const SizedBox(height: 8),
+            FilledButton.icon(
+              onPressed: submission.submitting
+                  ? null
+                  : () async {
+                      if (!controller.validate(loaded.definition.dataSchema)) {
+                        ScaffoldMessenger.of(context).showSnackBar(
+                          const SnackBar(content: Text('请检查表单中的必填项和时间范围')),
+                        );
+                        return;
+                      }
+                      final confirmed = await showModalBottomSheet<bool>(
+                        context: context,
+                        showDragHandle: true,
+                        builder: (context) => _ConfirmationSheet(
+                          values: ref.read(leaveDraftProvider).values,
+                        ),
+                      );
+                      if (confirmed != true || !context.mounted) return;
+                      final created = await ref
+                          .read(leaveSubmissionProvider.notifier)
+                          .submit(ref.read(leaveDraftProvider).values);
+                      if (!context.mounted) return;
+                      if (created == null) {
+                        final message = ref.read(leaveSubmissionProvider).error;
+                        ScaffoldMessenger.of(context).showSnackBar(
+                          SnackBar(content: Text(message ?? '创建草稿失败')),
+                        );
+                        return;
+                      }
+                      await controller.clear();
+                      if (!context.mounted) return;
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text('后端草稿已创建：${created.id}')),
+                      );
+                      await showModalBottomSheet<void>(
+                        context: context,
+                        isScrollControlled: true,
+                        showDragHandle: true,
+                        builder: (context) =>
+                            LeaveAttachmentSheet(leaveRequestId: created.id),
+                      );
+                    },
+              icon: submission.submitting
+                  ? const SizedBox.square(
+                      dimension: 18,
+                      child: CircularProgressIndicator(strokeWidth: 2),
+                    )
+                  : const Icon(Icons.check_circle_outline),
+              label: Padding(
+                padding: EdgeInsets.symmetric(vertical: 14),
+                child: Text(submission.submitting ? '正在创建草稿…' : '检查并确认'),
+              ),
+            ),
+          ],
+        ),
       ),
     );
   }
 }
 
-class _AiAssistCard extends StatelessWidget {
+class _RestoredDraftBanner extends StatelessWidget {
+  const _RestoredDraftBanner({required this.onClear});
+
+  final Future<void> Function() onClear;
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialBanner(
+      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
+      leading: const Icon(Icons.restore),
+      content: const Text('已恢复上次未完成的本地草稿'),
+      actions: [TextButton(onPressed: onClear, child: const Text('清除'))],
+    );
+  }
+}
+
+class _DefinitionSourceBanner extends StatelessWidget {
+  const _DefinitionSourceBanner({required this.source});
+
+  final FormDefinitionSource source;
+
+  @override
+  Widget build(BuildContext context) {
+    final (icon, text) = switch (source) {
+      FormDefinitionSource.remote => (Icons.cloud_done_outlined, '已加载最新表单定义'),
+      FormDefinitionSource.cache => (
+        Icons.offline_bolt_outlined,
+        '当前离线，使用已缓存表单定义',
+      ),
+      FormDefinitionSource.bundled => (
+        Icons.inventory_2_outlined,
+        '当前离线，使用内置安全表单定义',
+      ),
+    };
+    return Row(
+      children: [
+        Icon(icon, size: 18),
+        const SizedBox(width: 8),
+        Expanded(
+          child: Text(text, style: Theme.of(context).textTheme.bodySmall),
+        ),
+      ],
+    );
+  }
+}
+
+class _AiAssistCard extends ConsumerStatefulWidget {
   const _AiAssistCard({required this.onApply});
 
-  final VoidCallback onApply;
+  final void Function(Map<String, Object?> values) onApply;
+
+  @override
+  ConsumerState<_AiAssistCard> createState() => _AiAssistCardState();
+}
+
+class _AiAssistCardState extends ConsumerState<_AiAssistCard> {
+  final textController = TextEditingController(text: '明天下午请事假四小时，办理个人事务');
+  bool loading = false;
+
+  @override
+  void dispose() {
+    textController.dispose();
+    super.dispose();
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -67,29 +175,75 @@ class _AiAssistCard extends StatelessWidget {
       ).colorScheme.primaryContainer.withValues(alpha: 0.45),
       child: Padding(
         padding: const EdgeInsets.all(16),
-        child: Row(
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [
-            const CircleAvatar(child: Icon(Icons.auto_awesome)),
-            const SizedBox(width: 12),
-            const Expanded(
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: [
-                  Text(
-                    'AI 表单助手',
+            const Row(
+              children: [
+                CircleAvatar(child: Icon(Icons.auto_awesome)),
+                SizedBox(width: 12),
+                Expanded(
+                  child: Text(
+                    '千问表单助手',
                     style: TextStyle(fontWeight: FontWeight.w700),
                   ),
-                  SizedBox(height: 4),
-                  Text('示例：帮我填写明天下午的事假申请'),
-                ],
+                ),
+              ],
+            ),
+            const SizedBox(height: 12),
+            TextField(
+              controller: textController,
+              minLines: 2,
+              maxLines: 4,
+              maxLength: 2000,
+              decoration: const InputDecoration(
+                hintText: '例如：明天下午请事假四小时，办理个人事务',
+                border: OutlineInputBorder(),
               ),
             ),
-            TextButton(onPressed: onApply, child: const Text('自动填写')),
+            FilledButton.icon(
+              onPressed: loading ? null : _suggest,
+              icon: loading
+                  ? const SizedBox.square(
+                      dimension: 16,
+                      child: CircularProgressIndicator(strokeWidth: 2),
+                    )
+                  : const Icon(Icons.auto_awesome),
+              label: Text(loading ? '正在生成建议…' : '生成草稿建议'),
+            ),
           ],
         ),
       ),
     );
   }
+
+  Future<void> _suggest() async {
+    if (textController.text.trim().isEmpty) return;
+    setState(() => loading = true);
+    try {
+      final suggestion = await ref
+          .read(aiLeaveSuggestionRepositoryProvider)
+          .suggest(textController.text);
+      if (!mounted) return;
+      widget.onApply(suggestion.values);
+      final notes = [
+        ...suggestion.assumptions,
+        ...suggestion.needsClarification,
+      ];
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(notes.isEmpty ? 'AI 建议已填入，请检查并确认' : notes.join('；')),
+        ),
+      );
+    } on AiLeaveSuggestionException catch (error) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(error.message)));
+    } finally {
+      if (mounted) setState(() => loading = false);
+    }
+  }
 }
 
 class _ConfirmationSheet extends StatelessWidget {
@@ -128,10 +282,7 @@ class _ConfirmationSheet extends StatelessWidget {
             const SizedBox(height: 16),
             FilledButton(
               onPressed: () {
-                Navigator.pop(context);
-                ScaffoldMessenger.of(context).showSnackBar(
-                  const SnackBar(content: Text('演示模式：草稿已通过本地校验，尚未调用后端')),
-                );
+                Navigator.pop(context, true);
               },
               child: const Text('确认创建草稿'),
             ),