feat: écran détail serveur (stats CPU/RAM + image importable RustFS)

- carte cliquable → ServerDetailScreen : bannière (image ou thème), statut,
  connexion/ouvrir, joueurs/MOTD, jauges CPU/RAM/réseau (docker stats),
  import/suppression d'image (galerie → backend → RustFS).
- api_service: stats(), server(), imageBytes(), uploadImage(), deleteImage().
- deps: image_picker.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/models.dart

@@ -16,6 +16,7 @@ class GameServer {
   final int? maxPlayers;
   final String? motd;
   final bool hasIcon;
+  final bool hasImage;
 
   const GameServer({
     required this.id,
@@ -32,6 +33,7 @@ class GameServer {
     this.maxPlayers,
     this.motd,
     this.hasIcon = false,
+    this.hasImage = false,
   });
 
   factory GameServer.fromJson(Map<String, dynamic> json) => GameServer(
@@ -49,6 +51,7 @@ class GameServer {
         maxPlayers: json['max_players'] as int?,
         motd: json['motd'] as String?,
         hasIcon: json['has_icon'] as bool? ?? false,
+        hasImage: json['has_image'] as bool? ?? false,
       );
 
   bool get isUp => status == 'online' || status == 'running';

lib/screens/server_detail_screen.dart

@@ -0,0 +1,311 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+import '../models.dart';
+import '../services/api_service.dart';
+
+/// Détail d'un serveur : bannière (image importée ou thème), statut, connexion,
+/// stats d'utilisation (CPU/RAM/réseau) et gestion de l'image (import/suppression).
+class ServerDetailScreen extends StatefulWidget {
+  const ServerDetailScreen({super.key, required this.server, required this.api});
+  final GameServer server;
+  final ApiService api;
+
+  @override
+  State<ServerDetailScreen> createState() => _ServerDetailScreenState();
+}
+
+class _ServerDetailScreenState extends State<ServerDetailScreen> {
+  GameServer get s => _server;
+  late GameServer _server = widget.server;
+
+  Map<String, dynamic>? _stats;
+  Uint8List? _image;
+  bool _busy = false;
+  bool _imgBusy = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _load();
+  }
+
+  Future<void> _load() async {
+    final results = await Future.wait([
+      widget.api.stats(s.id).catchError((_) => <String, dynamic>{'running': false}),
+      widget.api.imageBytes(s.id).catchError((_) => null),
+      widget.api.server(s.id).catchError((_) => _server),
+    ]);
+    if (!mounted) return;
+    setState(() {
+      _stats = results[0] as Map<String, dynamic>;
+      _image = results[1] as Uint8List?;
+      _server = results[2] as GameServer;
+    });
+  }
+
+  Future<void> _toggle() async {
+    setState(() => _busy = true);
+    try {
+      s.isUp ? await widget.api.stop(s.id) : await widget.api.start(s.id);
+      await Future.delayed(const Duration(seconds: 2));
+      await _load();
+    } catch (e) {
+      _snack('$e');
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
+  Future<void> _pickImage() async {
+    final x = await ImagePicker().pickImage(source: ImageSource.gallery, maxWidth: 1600);
+    if (x == null) return;
+    setState(() => _imgBusy = true);
+    try {
+      await widget.api.uploadImage(s.id, x.path);
+      final bytes = await widget.api.imageBytes(s.id);
+      if (mounted) setState(() => _image = bytes);
+    } catch (e) {
+      _snack('$e');
+    } finally {
+      if (mounted) setState(() => _imgBusy = false);
+    }
+  }
+
+  Future<void> _deleteImage() async {
+    setState(() => _imgBusy = true);
+    try {
+      await widget.api.deleteImage(s.id);
+      if (mounted) setState(() => _image = null);
+    } catch (e) {
+      _snack('$e');
+    } finally {
+      if (mounted) setState(() => _imgBusy = false);
+    }
+  }
+
+  void _snack(String m) {
+    if (mounted) ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(m)));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final t = s.theme;
+    final badge = s.statusBadge;
+    return Scaffold(
+      appBar: AppBar(title: Text(s.name)),
+      body: RefreshIndicator(
+        onRefresh: _load,
+        child: ListView(
+          children: [
+            _banner(t),
+            Padding(
+              padding: const EdgeInsets.all(16),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Row(
+                    children: [
+                      _Pill(label: badge.label, color: badge.color),
+                      const SizedBox(width: 8),
+                      _Pill(label: s.isPreprod ? 'Preprod' : 'Production',
+                          color: s.isPreprod ? const Color(0xFFFF9F0A) : const Color(0xFF34C759)),
+                      const Spacer(),
+                      if (s.web && s.openUrl != null)
+                        OutlinedButton.icon(
+                          onPressed: () =>
+                              launchUrl(Uri.parse(s.openUrl!), mode: LaunchMode.externalApplication),
+                          icon: const Icon(Icons.open_in_new, size: 18),
+                          label: const Text('Ouvrir'),
+                        ),
+                    ],
+                  ),
+                  const SizedBox(height: 16),
+                  _toggleButton(),
+                  const SizedBox(height: 20),
+                  if (s.connect != null) _info(Icons.link, 'Connexion', s.connect!),
+                  if (s.status == 'online')
+                    _info(Icons.people, 'Joueurs', '${s.players ?? 0} / ${s.maxPlayers ?? 0}'),
+                  if (s.motd != null) _info(Icons.chat_bubble_outline, 'MOTD', s.motd!),
+                  const SizedBox(height: 20),
+                  _statsCard(),
+                  const SizedBox(height: 20),
+                  _imageCard(),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _banner(({Color start, Color end, IconData icon}) t) {
+    return SizedBox(
+      height: 190,
+      width: double.infinity,
+      child: _image != null
+          ? Image.memory(_image!, fit: BoxFit.cover)
+          : DecoratedBox(
+              decoration: BoxDecoration(
+                gradient: LinearGradient(
+                    begin: Alignment.topLeft, end: Alignment.bottomRight, colors: [t.start, t.end]),
+              ),
+              child: Center(child: Icon(t.icon, size: 72, color: Colors.white70)),
+            ),
+    );
+  }
+
+  Widget _toggleButton() {
+    return SizedBox(
+      width: double.infinity,
+      child: FilledButton.icon(
+        onPressed: _busy ? null : _toggle,
+        style: FilledButton.styleFrom(
+          backgroundColor: s.isUp ? const Color(0xFFB3261E) : const Color(0xFF1B5E20),
+          padding: const EdgeInsets.symmetric(vertical: 14),
+        ),
+        icon: _busy
+            ? const SizedBox(width: 18, height: 18, child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white))
+            : Icon(s.isUp ? Icons.stop : Icons.play_arrow),
+        label: Text(s.isUp ? 'Éteindre le serveur' : 'Démarrer le serveur'),
+      ),
+    );
+  }
+
+  Widget _info(IconData icon, String label, String value) {
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 12),
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Icon(icon, size: 20, color: Theme.of(context).colorScheme.primary),
+          const SizedBox(width: 12),
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(label, style: Theme.of(context).textTheme.labelMedium),
+                Text(value, style: Theme.of(context).textTheme.bodyLarge),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _statsCard() {
+    final st = _stats;
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text('Utilisation', style: Theme.of(context).textTheme.titleMedium),
+            const SizedBox(height: 12),
+            if (st == null)
+              const Center(child: Padding(padding: EdgeInsets.all(8), child: CircularProgressIndicator()))
+            else if (st['running'] != true)
+              const Text('Serveur éteint — pas de stats.')
+            else ...[
+              _gauge('CPU', (st['cpu_percent'] as num?)?.toDouble() ?? 0,
+                  '${st['cpu_percent']} %'),
+              const SizedBox(height: 12),
+              _gauge('RAM', (st['mem_percent'] as num?)?.toDouble() ?? 0,
+                  '${st['mem_used_mb']} Mo${st['mem_limit_mb'] != null ? ' / ${_fmtMb(st['mem_limit_mb'])}' : ''}'),
+              const SizedBox(height: 12),
+              Text('Réseau : ↓ ${st['net_rx_mb']} Mo   ↑ ${st['net_tx_mb']} Mo',
+                  style: Theme.of(context).textTheme.bodyMedium),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+
+  String _fmtMb(dynamic mb) {
+    final v = (mb as num).toDouble();
+    return v >= 1024 ? '${(v / 1024).toStringAsFixed(1)} Go' : '${v.round()} Mo';
+  }
+
+  Widget _gauge(String label, double percent, String value) {
+    final p = (percent / 100).clamp(0.0, 1.0);
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Text(label, style: const TextStyle(fontWeight: FontWeight.w600)),
+            Text(value, style: Theme.of(context).textTheme.bodyMedium),
+          ],
+        ),
+        const SizedBox(height: 6),
+        ClipRRect(
+          borderRadius: BorderRadius.circular(6),
+          child: LinearProgressIndicator(value: p, minHeight: 8),
+        ),
+      ],
+    );
+  }
+
+  Widget _imageCard() {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text('Image', style: Theme.of(context).textTheme.titleMedium),
+            const SizedBox(height: 6),
+            Text('Screenshot ou visuel du serveur (stocké sur RustFS).',
+                style: Theme.of(context).textTheme.bodySmall),
+            const SizedBox(height: 12),
+            Row(
+              children: [
+                FilledButton.tonalIcon(
+                  onPressed: _imgBusy ? null : _pickImage,
+                  icon: _imgBusy
+                      ? const SizedBox(width: 16, height: 16, child: CircularProgressIndicator(strokeWidth: 2))
+                      : const Icon(Icons.upload),
+                  label: Text(_image == null ? 'Importer' : 'Remplacer'),
+                ),
+                const SizedBox(width: 8),
+                if (_image != null)
+                  OutlinedButton.icon(
+                    onPressed: _imgBusy ? null : _deleteImage,
+                    icon: const Icon(Icons.delete_outline),
+                    label: const Text('Supprimer'),
+                  ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _Pill extends StatelessWidget {
+  const _Pill({required this.label, required this.color});
+  final String label;
+  final Color color;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
+      decoration: BoxDecoration(
+        color: color.withOpacity(0.18),
+        borderRadius: BorderRadius.circular(999),
+        border: Border.all(color: color),
+      ),
+      child: Text(label, style: TextStyle(color: color, fontSize: 12, fontWeight: FontWeight.w700)),
+    );
+  }
+}

lib/screens/servers_screen.dart

@@ -5,6 +5,7 @@ import '../services/api_service.dart';
 import '../services/auth_service.dart';
 import '../services/update_service.dart';
 import '../widgets/server_card.dart';
+import 'server_detail_screen.dart';
 import 'settings_screen.dart';
 
 class ServersScreen extends StatefulWidget {
@@ -110,6 +111,12 @@ class _ServersScreenState extends State<ServersScreen> {
     }
   }
 
+  Future<void> _openDetail(GameServer s) async {
+    await Navigator.push(context,
+        MaterialPageRoute(builder: (_) => ServerDetailScreen(server: s, api: widget.api)));
+    _refresh();
+  }
+
   Future<void> _openSettings() async {
     await Navigator.push(context,
         MaterialPageRoute(builder: (_) => SettingsScreen(api: widget.api)));
@@ -191,6 +198,7 @@ class _ServersScreenState extends State<ServersScreen> {
             iconUrl: snap.data ?? '',
             busy: _busy.contains(s.id),
             onToggle: () => _toggle(s),
+            onTap: () => _openDetail(s),
           ),
         ),
       );

lib/services/api_service.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:typed_data';
 
 import 'package:http/http.dart' as http;
 import 'package:shared_preferences/shared_preferences.dart';
@@ -36,6 +37,14 @@ class ApiService {
     return list.map((e) => GameServer.fromJson(e as Map<String, dynamic>)).toList();
   }
 
+  Future<GameServer> server(String id) async {
+    final base = await baseUrl;
+    final res = await http.get(Uri.parse('$base/api/servers/$id'), headers: await _headers());
+    if (res.statusCode == 401) throw UnauthorizedException();
+    if (res.statusCode != 200) throw ApiException('Erreur ${res.statusCode}');
+    return GameServer.fromJson(jsonDecode(res.body) as Map<String, dynamic>);
+  }
+
   Future<void> start(String id) => _action(id, 'start');
   Future<void> stop(String id) => _action(id, 'stop');
 
@@ -50,6 +59,42 @@ class ApiService {
   }
 
   Future<String> iconUrl(String id) async => '${await baseUrl}/api/servers/$id/icon';
+
+  /// Stats d'utilisation du conteneur (CPU/RAM/réseau). `{running:false}` si éteint.
+  Future<Map<String, dynamic>> stats(String id) async {
+    final base = await baseUrl;
+    final res = await http.get(Uri.parse('$base/api/servers/$id/stats'), headers: await _headers());
+    if (res.statusCode == 401) throw UnauthorizedException();
+    if (res.statusCode != 200) throw ApiException('Erreur ${res.statusCode}');
+    return jsonDecode(res.body) as Map<String, dynamic>;
+  }
+
+  /// Image importée du serveur (bytes), null si aucune.
+  Future<Uint8List?> imageBytes(String id) async {
+    final base = await baseUrl;
+    final res = await http.get(Uri.parse('$base/api/servers/$id/image'), headers: await _headers());
+    if (res.statusCode == 401) throw UnauthorizedException();
+    if (res.statusCode != 200) return null;
+    return res.bodyBytes;
+  }
+
+  Future<void> uploadImage(String id, String filePath) async {
+    final base = await baseUrl;
+    final token = await _auth.validToken();
+    final req = http.MultipartRequest('POST', Uri.parse('$base/api/servers/$id/image'))
+      ..headers['Authorization'] = 'Bearer ${token ?? ''}'
+      ..files.add(await http.MultipartFile.fromPath('file', filePath));
+    final res = await http.Response.fromStream(await req.send());
+    if (res.statusCode == 401) throw UnauthorizedException();
+    if (res.statusCode >= 400) throw ApiException('Envoi refusé (${res.statusCode})');
+  }
+
+  Future<void> deleteImage(String id) async {
+    final base = await baseUrl;
+    final res = await http.delete(Uri.parse('$base/api/servers/$id/image'), headers: await _headers());
+    if (res.statusCode == 401) throw UnauthorizedException();
+    if (res.statusCode >= 400) throw ApiException('Suppression refusée (${res.statusCode})');
+  }
 }
 
 class UnauthorizedException implements Exception {}

lib/widgets/server_card.dart

@@ -10,19 +10,24 @@ class ServerCard extends StatelessWidget {
     required this.iconUrl,
     required this.busy,
     required this.onToggle,
+    this.onTap,
   });
 
   final GameServer server;
   final String iconUrl;
   final bool busy;
   final VoidCallback onToggle;
+  final VoidCallback? onTap;
 
   @override
   Widget build(BuildContext context) {
     final t = server.theme;
     final badge = server.statusBadge;
     return Card(
-      child: Container(
+      clipBehavior: Clip.antiAlias,
+      child: InkWell(
+        onTap: onTap,
+        child: Container(
         decoration: BoxDecoration(
           gradient: LinearGradient(
             begin: Alignment.topLeft,
@@ -101,6 +106,7 @@ class ServerCard extends StatelessWidget {
           ],
         ),
       ),
+      ),
     );
   }
 }