feat(layout): implement responsive edge-to-edge card grid with density-aware column calculation

- Add dynamic column calculation based on container width and min card width
- Prevent tiny cards on narrow windows by respecting density-based minimums:
  - Default: 240px, Medium: 200px, Compact: 170px
- Fix edge-to-edge layout with proper CSS selector (.virtual-scroll-item.model-card)
- Add hamburger menu for mobile/small screens with proper translations
- Update all locale files with 'common.actions.menu' key

Fixes: Cards becoming too small/overlapping on narrow window widths (e.g., 1156px)
Changes: 15 files, +569/-114 lines

locales/de.json

@@ -15,7 +15,8 @@
             "settings": "Einstellungen",
             "help": "Hilfe",
             "add": "Hinzufügen",
-            "close": "Schließen"
+            "close": "Schließen",
+            "menu": "Menü"
         },
         "status": {
             "loading": "Wird geladen...",

locales/en.json

@@ -15,7 +15,8 @@
             "settings": "Settings",
             "help": "Help",
             "add": "Add",
-            "close": "Close"
+            "close": "Close",
+            "menu": "Menu"
         },
         "status": {
             "loading": "Loading...",

locales/es.json

@@ -15,7 +15,8 @@
             "settings": "Configuración",
             "help": "Ayuda",
             "add": "Añadir",
-            "close": "Cerrar"
+            "close": "Cerrar",
+            "menu": "Menú"
         },
         "status": {
             "loading": "Cargando...",

locales/fr.json

@@ -15,7 +15,8 @@
             "settings": "Paramètres",
             "help": "Aide",
             "add": "Ajouter",
-            "close": "Fermer"
+            "close": "Fermer",
+            "menu": "Menu"
         },
         "status": {
             "loading": "Chargement...",

locales/he.json

@@ -15,7 +15,8 @@
             "settings": "הגדרות",
             "help": "עזרה",
             "add": "הוספה",
-            "close": "סגור"
+            "close": "סגור",
+            "menu": "תפריט"
         },
         "status": {
             "loading": "טוען...",

locales/ja.json

@@ -15,7 +15,8 @@
             "settings": "設定",
             "help": "ヘルプ",
             "add": "追加",
-            "close": "閉じる"
+            "close": "閉じる",
+            "menu": "メニュー"
         },
         "status": {
             "loading": "読み込み中...",

locales/ko.json

@@ -15,7 +15,8 @@
             "settings": "설정",
             "help": "도움말",
             "add": "추가",
-            "close": "닫기"
+            "close": "닫기",
+            "menu": "메뉴"
         },
         "status": {
             "loading": "로딩 중...",

locales/ru.json

@@ -15,7 +15,8 @@
             "settings": "Настройки",
             "help": "Справка",
             "add": "Добавить",
-            "close": "Закрыть"
+            "close": "Закрыть",
+            "menu": "Меню"
         },
         "status": {
             "loading": "Загрузка...",

locales/zh-CN.json

@@ -15,7 +15,8 @@
             "settings": "设置",
             "help": "帮助",
             "add": "添加",
-            "close": "关闭"
+            "close": "关闭",
+            "menu": "菜单"
         },
         "status": {
             "loading": "加载中...",

locales/zh-TW.json

@@ -15,7 +15,8 @@
             "settings": "設定",
             "help": "說明",
             "add": "新增",
-            "close": "關閉"
+            "close": "關閉",
+            "menu": "選單"
         },
         "status": {
             "loading": "載入中...",