Added permanent upgrades! Currently just adding rows or columns to farm.

Scripts/Garden/Upgrades.js

@@ -0,0 +1,103 @@
+const GardenExpansionBaseCost = 1000;
+
+
+function GetGardenColumnUpgradeCost(
+    SaveData
+) {
+    return CalculateGardenExpansionCost(
+        SaveData.Garden.Height
+    );
+}
+
+
+function GetGardenRowUpgradeCost(
+    SaveData
+) {
+    return CalculateGardenExpansionCost(
+        SaveData.Garden.Width
+    );
+}
+
+
+function CalculateGardenExpansionCost(
+    AddedPlots
+) {
+    const PlotCount = Math.max(
+        1,
+        Math.floor(
+            Number(AddedPlots) || 1
+        )
+    );
+
+    return Math.round(
+        GardenExpansionBaseCost *
+        PlotCount *
+        (1 + PlotCount / 10)
+    );
+}
+
+
+function AddGardenColumn(
+    SaveData
+) {
+    const Garden = SaveData.Garden;
+    const OldWidth = Garden.Width;
+    const Height = Garden.Height;
+    const NewWidth = OldWidth + 1;
+
+    const NewPlots = Array(
+        NewWidth * Height
+    ).fill(null);
+
+
+    for (
+        let Y = 0;
+        Y < Height;
+        Y++
+    ) {
+        for (
+            let X = 0;
+            X < OldWidth;
+            X++
+        ) {
+            NewPlots[
+                Y * NewWidth + X
+            ] = Garden.Plots[
+                Y * OldWidth + X
+            ] ?? null;
+        }
+    }
+
+
+    Garden.Width = NewWidth;
+    Garden.Plots = NewPlots;
+
+    ResetGardenMutationCooldowns(
+        SaveData
+    );
+}
+
+
+function AddGardenRow(
+    SaveData
+) {
+    const Garden = SaveData.Garden;
+    const Width = Garden.Width;
+
+    Garden.Height++;
+
+    Garden.Plots.push(
+        ...Array(Width).fill(null)
+    );
+
+    ResetGardenMutationCooldowns(
+        SaveData
+    );
+}
+
+
+function ResetGardenMutationCooldowns(
+    SaveData
+) {
+    SaveData.MutationCooldowns = {};
+}