feat(raw-materials): add bulk JSON import with upsert and full-page edit routes (#10)

Fixes #9

---------

Co-authored-by: Your Name <you@example.com>
Reviewed-on: #10
Co-authored-by: antigravity-bot <bot@kittisak.com>

apps/backend/src/routes/raw-materials.ts

@@ -14,11 +14,77 @@ export const rawMaterialsRoute = new Elysia({ prefix: "/raw-materials" })
 
     const rawMaterial = await prisma.rawMaterial.findUnique({
       where: { id },
+      include: {
+        bomItems: {
+          include: {
+            productVariant: {
+              include: {
+                product: {
+                  select: { id: true, name: true, sku: true }
+                }
+              }
+            }
+          }
+        }
+      }
     });
 
     if (!rawMaterial) return status(404, { message: "Raw material not found" });
     return rawMaterial;
   })
+  .post("/bulk", async ({ body, status }) => {
+    try {
+      const items = Array.isArray(body) ? body : [body];
+      if (items.length === 0) {
+        return status(400, { message: "Payload must be a non-empty array" });
+      }
+
+      const results = await prisma.$transaction(async (tx) => {
+        const records = [];
+        for (const item of items) {
+          const name = String(item.name || "").trim();
+          if (!name) continue;
+
+          const unit = String(item.unit || "piece").trim() || "piece";
+          const rawPrice = item.pricePerUnit;
+          const pricePerUnit = typeof rawPrice === "string" ? (parseFloat(rawPrice) || 0) : Number(rawPrice) || 0;
+
+          const record = await tx.rawMaterial.upsert({
+            where: { name },
+            create: {
+              name,
+              unit,
+              pricePerUnit,
+            },
+            update: {
+              unit,
+              pricePerUnit,
+            },
+          });
+          records.push(record);
+        }
+        return records;
+      });
+
+      return status(200, {
+        success: true,
+        count: results.length,
+        items: results,
+      });
+    } catch (err: any) {
+      console.error("Bulk raw material import failed:", err);
+      return status(500, { message: "Failed to bulk import raw materials", error: err.message });
+    }
+  }, {
+    body: t.Array(
+      t.Object({
+        name: t.String(),
+        unit: t.Optional(t.String()),
+        pricePerUnit: t.Union([t.Number(), t.String()]),
+      })
+    ),
+    detail: { tags: ["raw-materials"] }
+  })
   .post("/", async ({ body, status }) => {
     try {
       const rawMaterial = await prisma.rawMaterial.create({