feat: step-by-step quote flow like logistics project

New pages: /catalog/product → /catalog/destination → /catalog/quantity → /catalog/results
Each step has fullscreen map + white bottom sheet card (rounded-t-3xl).
Header capsule in quote mode now navigates between steps.
i18n keys added for step titles (en/ru).

i18n/locales/en/catalog.json

@@ -87,7 +87,8 @@
       "selectSupplier": "Select supplier",
       "enterQty": "Quantity (t)",
       "search": "Search",
-      "clear": "Clear"
+      "clear": "Clear",
+      "findOffers": "Find offers"
     },
     "explore": {
       "title": "Explore the market",
@@ -95,6 +96,14 @@
     },
     "offers": "offer | offers",
     "list": "List",
-    "applyFilter": "Apply filter"
+    "applyFilter": "Apply filter",
+    "step": "Step {n}",
+    "steps": {
+      "selectProduct": "What are you looking for?",
+      "selectDestination": "Where to deliver?",
+      "setQuantity": "How much do you need?",
+      "results": "Results",
+      "newSearch": "New search"
+    }
   }
 }

i18n/locales/ru/catalog.json

@@ -87,7 +87,8 @@
       "selectSupplier": "Выберите поставщика",
       "enterQty": "Количество (т)",
       "search": "Найти",
-      "clear": "Очистить"
+      "clear": "Очистить",
+      "findOffers": "Найти предложения"
     },
     "explore": {
       "title": "Исследуйте рынок",
@@ -95,6 +96,14 @@
     },
     "offers": "предложение | предложения | предложений",
     "list": "Список",
-    "applyFilter": "Применить фильтр"
+    "applyFilter": "Применить фильтр",
+    "step": "Шаг {n}",
+    "steps": {
+      "selectProduct": "Что ищете?",
+      "selectDestination": "Куда доставить?",
+      "setQuantity": "Сколько нужно?",
+      "results": "Результаты",
+      "newSearch": "Новый поиск"
+    }
   }
 }