feat: More bonus (exponential) and method to list icons needed

public/locales/en.json

@@ -302,5 +302,27 @@
       "a_leg_2": "Eternal Return",
       "a_evt_1": "Quick Hands"
     }
+  },
+  "endless": {
+    "title": "Endless upgrades",
+    "intro": "Finish a family of upgrades and it carries on forever: every level multiplies its effect again and costs exponentially more. There is no real end.",
+    "amount": "Levels to buy",
+    "level": "Level {level}",
+    "perLevel": "Each level: {effect}",
+    "total": "Now: {effect}",
+    "none": "No level yet",
+    "buy": "Buy ×{count}",
+    "maxed": "Maxed",
+    "name": {
+      "generator": "{target} overhaul",
+      "e_click": "Manual mastery",
+      "e_global": "Total optimisation",
+      "e_demand": "Mass appeal",
+      "e_value": "Premium margin",
+      "e_efficiency": "{@theme.res.material} thrift",
+      "e_discount": "Hard bargaining",
+      "e_stack": "{@theme.res.material} stockpiling",
+      "e_cost": "Economies of scale"
+    }
   }
 }