feat: refonte thème clair/sombre, archive, raccourcis, quitter, flyouts Raycast

- Réécriture ThemeHelper: ActualTheme au lieu de ThemeDictionaries walk
- Fond des cartes de notes adaptatif clair/sombre (semi-transparent)
- Texte des cartes via héritage XAML (plus de Foreground explicite)
- ActionPanel: tous les brushes migrés vers Opacity + RequestedTheme
- Rafraîchissement auto des cartes sur ActualThemeChanged
- Archive: propriété IsArchived, vue Archive, archiver/désarchiver
- Commandes slash: ToggleSwitch → CheckItem cohérent
- Section Raccourcis dans paramètres (Afficher: Ctrl+Alt+N, Nouvelle note: Ctrl+N)
- Quitter (rouge) dans Accès rapide
- Snippets et TextExpansionService
- AppSettings nettoyé (plus de ThemeHelper.CurrentTheme)

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: devohmycode

ActionPanel.cs

@@ -75,8 +75,8 @@ public record ShortcutEntry(string Name, string DisplayLabel, Modifiers Modifier
 
     public static List<ShortcutEntry> GetDefaults() =>
     [
-        new("show", "Afficher NotesUI", Modifiers.Ctrl, 0x4E), // Ctrl+N
-        new("new_note", "Cr\u00e9er nouvelle note", Modifiers.Ctrl | Modifiers.Alt, 0x4E), // Ctrl+Alt+N
+        new("show", Lang.T("shortcut_show"), Modifiers.Ctrl | Modifiers.Alt, 0x4E), // Ctrl+Alt+N
+        new("new_note", Lang.T("shortcut_new_note"), Modifiers.Ctrl, 0x4E), // Ctrl+N
     ];
 
     public static List<ShortcutEntry> Load()

HotkeyService.cs

@@ -113,6 +113,8 @@ public static class Lang
             ["voice_model"] = "Voice model",
             ["shortcuts_section"] = "Shortcuts",
             ["shortcuts_label"] = "Shortcuts",
+            ["shortcut_show"] = "Show",
+            ["shortcut_new_note"] = "New note",
             ["editor_section"] = "Editor",
             ["slash_commands_toggle"] = "Slash commands",
             ["enabled"] = "Enabled",
@@ -180,6 +182,15 @@ public static class Lang
             ["char_count_one"] = "1 character",
             ["char_count_many"] = "{0} characters",
 
+            // ── Snippet ───────────────────────────────────────────
+            ["snippet"] = "Snippet",
+            ["snippet_keyword"] = "Keyword",
+            ["snippet_keyword_placeholder"] = "e.g. addr, sig, hello",
+            ["snippet_prefix"] = "Prefix",
+            ["snippet_none"] = "None",
+            ["snippet_preview"] = "Type {0} then Space to expand",
+            ["snippet_saved"] = "Snippet saved",
+
             // ── OCR ─────────────────────────────────────────────
             ["ocr_select_zone"] = "Select a zone",
             ["ocr_too_small"] = "Selection too small",
@@ -232,10 +243,14 @@ public static class Lang
 
             // ── Views / Quick access ─────────────────────────────
             ["favorites"] = "Favorites",
+            ["archive"] = "Archive",
+            ["unarchive"] = "Unarchive",
+            ["no_archived"] = "No archived notes",
             ["no_favorites"] = "No favorites",
             ["no_tags"] = "No tags",
             ["no_notes_tag"] = "No notes with #{0}",
             ["quick_access"] = "Quick access",
+            ["quit"] = "Quit",
             ["rich_text"] = "Rich text",
             ["connect"] = "Connect",
             ["save_note"] = "Save note",
@@ -350,7 +365,9 @@ public static class Lang
             ["voice_section"] = "Vocal",
             ["voice_model"] = "Modèle vocal",
             ["shortcuts_section"] = "Raccourcis",
-            ["shortcuts_label"] = "Shortcuts",
+            ["shortcuts_label"] = "Raccourcis",
+            ["shortcut_show"] = "Afficher",
+            ["shortcut_new_note"] = "Nouvelle note",
             ["editor_section"] = "Éditeur",
             ["slash_commands_toggle"] = "Commandes slash",
             ["enabled"] = "Activé",
@@ -418,6 +435,15 @@ public static class Lang
             ["char_count_one"] = "1 caractère",
             ["char_count_many"] = "{0} caractères",
 
+            // ── Snippet ───────────────────────────────────────────
+            ["snippet"] = "Snippet",
+            ["snippet_keyword"] = "Mot clé",
+            ["snippet_keyword_placeholder"] = "ex: addr, sig, hello",
+            ["snippet_prefix"] = "Préfixe",
+            ["snippet_none"] = "Aucun",
+            ["snippet_preview"] = "Tapez {0} puis Espace pour insérer",
+            ["snippet_saved"] = "Snippet enregistré",
+
             // ── OCR ─────────────────────────────────────────────
             ["ocr_select_zone"] = "Sélectionnez une zone",
             ["ocr_too_small"] = "Sélection trop petite",
@@ -470,10 +496,14 @@ public static class Lang
 
             // ── Views / Quick access ─────────────────────────────
             ["favorites"] = "Favoris",
+            ["archive"] = "Archive",
+            ["unarchive"] = "Désarchiver",
+            ["no_archived"] = "Aucune note archivée",
             ["no_favorites"] = "Aucun favori",
             ["no_tags"] = "Aucun tag",
             ["no_notes_tag"] = "Aucune note avec #{0}",
             ["quick_access"] = "Accès rapide",
+            ["quit"] = "Quitter",
             ["rich_text"] = "Texte enrichi",
             ["connect"] = "Connecter",
             ["save_note"] = "Enregistrer la note",

Lang.cs

@@ -88,11 +88,11 @@
                      CornerRadius="4"
                      Padding="8,6,30,6">
                 <TextBox.Resources>
-                    <SolidColorBrush x:Key="TextControlBackground" Color="#08000000"/>
-                    <SolidColorBrush x:Key="TextControlBackgroundPointerOver" Color="#0F000000"/>
-                    <SolidColorBrush x:Key="TextControlBackgroundFocused" Color="#0F000000"/>
-                    <SolidColorBrush x:Key="TextControlBorderBrush" Color="#15000000"/>
-                    <SolidColorBrush x:Key="TextControlBorderBrushPointerOver" Color="#20000000"/>
+                    <StaticResource x:Key="TextControlBackground" ResourceKey="SubtleFillColorTransparentBrush"/>
+                    <StaticResource x:Key="TextControlBackgroundPointerOver" ResourceKey="SubtleFillColorSecondaryBrush"/>
+                    <StaticResource x:Key="TextControlBackgroundFocused" ResourceKey="SubtleFillColorSecondaryBrush"/>
+                    <StaticResource x:Key="TextControlBorderBrush" ResourceKey="SubtleFillColorTransparentBrush"/>
+                    <StaticResource x:Key="TextControlBorderBrushPointerOver" ResourceKey="ControlStrokeColorSecondaryBrush"/>
                 </TextBox.Resources>
             </TextBox>
             <FontIcon Glyph="&#xE721;" FontSize="14"