Fix solver values to display as percentage not decimal

- Added pct() helper function
- Target Equity IRR now shows 18% instead of 0.18
- Input accepts percentage and converts back to decimal internally

packages/web/components/ScenarioWizard.tsx

@@ -4,6 +4,11 @@ import { useState } from "react";
 import { Button } from "@/components/ui/button";
 import type { ScenarioInputPayload } from "@/lib/api";
 
+// Helper to convert decimal to percentage display
+function pct(raw: number): number {
+  return parseFloat((raw * 100).toFixed(2));
+}
+
 const LOCATION_OPTIONS = [
   { value: "RJ", label: "Rajasthan (High Solar)" },
   { value: "GJ", label: "Gujarat (High Solar)" },
@@ -359,14 +364,18 @@ function StepSolver({
         />
       </Field>
       {state.solver_mode === "solve_tariff" ? (
-        <Field label="Target Equity IRR (e.g. 0.18 = 18%)">
+        <Field label="Target Equity IRR">
+          <div className="flex items-center gap-1.5">
             <Input
               type="number"
-            value={state.target_irr}
-            step={0.01}
-            min={0.05}
-            onChange={(v) => set("target_irr", Number(v))}
+              value={pct(state.target_irr)}
+              step={1}
+              min={5}
+              max={40}
+              onChange={(v) => set("target_irr", Number(v) / 100)}
             />
+            <span className="text-sm text-muted-foreground">%</span>
+          </div>
         </Field>
       ) : (
         <Field label="Fixed Tariff (INR/kWh)">