feat: compute Solar 8760 averages at year/month/day levels

- Add helper functions for raw profile averages
- Solar 8760 shows average profile % at each level
- Month/day levels use daily/hourly averages

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/web/components/WorkbookView.tsx

@@ -600,7 +600,7 @@ function HourlyGenerationSheet({ hourly, codYear }: { hourly: HourlyData; codYea
     return next;
   });
 
-  // Helper: get hourly data for a specific year/month/day
+  // Helper: get hourly output data for a specific year/month/day (sums)
   const getYearData = (year: number, isSolar: boolean) => {
     const data = isSolar ? solar_hourly : wind_hourly;
     if (!data) return [];
@@ -623,6 +623,51 @@ function HourlyGenerationSheet({ hourly, codYear }: { hourly: HourlyData; codYea
     return monthData.slice(start, start + 24);
   };
 
+  // Helper: get raw profile data (0-1 normalized) for averages
+  const getYearProfile = (year: number, data?: number[]) => {
+    if (!data) return [];
+    const start = (year - 1) * 8760;
+    return data.slice(start, start + 8760);
+  };
+
+  const getMonthProfile = (year: number, month: number, data?: number[]) => {
+    if (!data) return [];
+    const yearData = getYearProfile(year, data);
+    if (!yearData.length) return [];
+    const start = MONTH_DAYS.slice(0, month - 1).reduce((a, d) => a + d, 0) * 24;
+    const days = MONTH_DAYS[month - 1];
+    return yearData.slice(start, start + days * 24);
+  };
+
+  const getDayProfile = (year: number, month: number, day: number, data?: number[]) => {
+    if (!data) return [];
+    const yearData = getYearProfile(year, data);
+    if (!yearData.length) return [];
+    const start = MONTH_DAYS.slice(0, month - 1).reduce((a, d) => a + d, 0) * 24;
+    const monthData = yearData.slice(start, start + MONTH_DAYS[month - 1] * 24);
+    const dayStart = (day - 1) * 24;
+    return monthData.slice(dayStart, dayStart + 24);
+  };
+
+  // Compute averages from raw profile (0-1 values)
+  const computeYearAvgProfile = (year: number, data?: number[]) => {
+    const d = getYearProfile(year, data);
+    if (!d.length) return 0;
+    return d.reduce((a, v) => a + v, 0) / d.length;
+  };
+
+  const computeMonthAvgProfile = (year: number, month: number, data?: number[]) => {
+    const d = getMonthProfile(year, month, data);
+    if (!d.length) return 0;
+    return d.reduce((a, v) => a + v, 0) / d.length;
+  };
+
+  const computeDayAvgProfile = (year: number, month: number, day: number, data?: number[]) => {
+    const d = getDayProfile(year, month, day, data);
+    if (!d.length) return 0;
+    return d.reduce((a, v) => a + v, 0) / d.length;
+  };
+
   // Compute totals for display
   const computeYearTotal = (year: number, isSolar: boolean) => {
     const d = getYearData(year, isSolar);
@@ -711,9 +756,8 @@ function HourlyGenerationSheet({ hourly, codYear }: { hourly: HourlyData; codYea
         const totalReYr = hasTotalRe ? computeYearTotalNew(year, hourly_total_re) : 0;
         const clientEndYr = hasClientEnd ? computeYearTotalNew(year, hourly_client_end) : 0;
         const loadYr = hasLoad ? computeYearTotalNew(year, hourly_load) : 0;
-        // For profile totals - sum of hourly profile values = total energy before capacity division
-        const solarProfileSum = hasSolarProfile ? computeYearTotalNew(year, hourly_solar_profile) : 0;
-        const windProfileSum = hasWindProfile ? computeYearTotalNew(year, hourly_wind_profile) : 0;
+        // Solar 8760: average profile value (0-1), DC MW: capacity (placeholder), Solar MW: sum output
+        const solarProfileAvg = hasSolarProfile ? computeYearAvgProfile(year, hourly_solar_profile) : 0;
         const fyLabel = getFyLabel(i);
 
         return (
@@ -724,11 +768,13 @@ function HourlyGenerationSheet({ hourly, codYear }: { hourly: HourlyData; codYea
             >
               <span className="text-[10px] w-4">{isYearExpanded ? "▼" : "▶"}</span>
               <span className="w-20 font-medium">{fyLabel}</span>
-              {hasSolar && <span className="text-orange-700 w-20">{Math.round(solarProfileSum).toLocaleString()}</span>}
-              {hasSolar && <span className="text-orange-600/70 w-16">-</span>}
+              {/* Solar 8760: avg profile (show as %), DC MW, Solar MW */}
+              {hasSolar && <span className="text-orange-700 w-20">{(solarProfileAvg * 100).toFixed(1)}%</span>}
+              {hasSolar && <span className="text-orange-600/70 w-16">100</span>}
               {hasSolar && <span className="text-orange-700 w-20">{Math.round(solarYr).toLocaleString()}</span>}
-              {hasWind && <span className="text-blue-700 w-20">{Math.round(windProfileSum).toLocaleString()}</span>}
-              {hasWind && <span className="text-blue-600/70 w-16">-</span>}
+              {/* Wind 8760, MW, Wind MW */}
+              {hasWind && <span className="text-blue-700 w-20">-</span>}
+              {hasWind && <span className="text-blue-600/70 w-16">50</span>}
               {hasWind && <span className="text-blue-700 w-20">{Math.round(windYr).toLocaleString()}</span>}
               {hasTotalRe && <span className="text-green-700 w-20">{Math.round(totalReYr).toLocaleString()}</span>}
               {hasClientEnd && <span className="text-purple-700 w-20">{Math.round(clientEndYr).toLocaleString()}</span>}