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>

pubspec.lock

@@ -33,6 +33,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.18.0"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "7caf6a750a0c04effbb52a676dce9a4a592e10ad35c34d6d2d0e4811160d5670"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.4+2"
   crypto:
     dependency: "direct main"
     description:
@@ -73,6 +81,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.1"
+  file_selector_linux:
+    dependency: transitive
+    description:
+      name: file_selector_linux
+      sha256: "54cbbd957e1156d29548c7d9b9ec0c0ebb6de0a90452198683a7d23aed617a33"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+2"
+  file_selector_macos:
+    dependency: transitive
+    description:
+      name: file_selector_macos
+      sha256: "271ab9986df0c135d45c3cdb6bd0faa5db6f4976d3e4b437cf7d0f258d941bfc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4+2"
+  file_selector_platform_interface:
+    dependency: transitive
+    description:
+      name: file_selector_platform_interface
+      sha256: a3994c26f10378a039faa11de174d7b78eb8f79e4dd0af2a451410c1a5c3f66b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.6.2"
+  file_selector_windows:
+    dependency: transitive
+    description:
+      name: file_selector_windows
+      sha256: "320fcfb6f33caa90f0b58380489fc5ac05d99ee94b61aa96ec2bff0ba81d3c2b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+4"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -86,6 +126,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: "1c2b787f99bdca1f3718543f81d38aa1b124817dfeb9fb196201bea85b6134bf"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.26"
   flutter_secure_storage:
     dependency: "direct main"
     description:
@@ -171,6 +219,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
+  image_picker:
+    dependency: "direct main"
+    description:
+      name: image_picker
+      sha256: "021834d9c0c3de46bf0fe40341fa07168407f694d9b2bb18d532dc1261867f7a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      sha256: "82652a75e3dd667a91187769a6a2cc81bd8c111bbead698d8e938d2b63e5e89a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.12+21"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      sha256: "717eb042ab08c40767684327be06a5d8dbb341fe791d514e4b92c7bbe1b7bb83"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.6"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      sha256: "05da758e67bc7839e886b3959848aa6b44ff123ab4b28f67891008afe8ef9100"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.12+2"
+  image_picker_linux:
+    dependency: transitive
+    description:
+      name: image_picker_linux
+      sha256: "34a65f6740df08bbbeb0a1abd8e6d32107941fd4868f67a507b25601651022c9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+2"
+  image_picker_macos:
+    dependency: transitive
+    description:
+      name: image_picker_macos
+      sha256: "1b90ebbd9dcf98fb6c1d01427e49a55bd96b5d67b8c67cf955d60a5de74207c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+2"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      sha256: "886d57f0be73c4b140004e78b9f28a8914a09e50c2d816bdd0520051a71236a0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.1"
+  image_picker_windows:
+    dependency: transitive
+    description:
+      name: image_picker_windows
+      sha256: "6ad07afc4eb1bc25f3a01084d28520496c4a3bb0cb13685435838167c9dcedeb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+1"
   js:
     dependency: transitive
     description:
@@ -203,6 +315,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.15.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  open_filex:
+    dependency: "direct main"
+    description:
+      name: open_filex
+      sha256: "9976da61b6a72302cf3b1efbce259200cd40232643a467aac7370addf94d6900"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.7.0"
   package_info_plus:
     dependency: "direct main"
     description:
@@ -228,7 +356,7 @@ packages:
     source: hosted
     version: "1.9.1"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"