fix(backend): Add Batch-FacilityPlant relation and fix Prisma queries

- Added bi-directional relation between Batch and FacilityPlant in schema.prisma
- Fixed logic in insights.routes.ts to use simplified plant count query
- Fixed duplicate property in messaging.routes.ts findMany filter
- Fixed null/undefined type mismatch in audit.routes.ts extractClientInfo

backend/prisma/schema.prisma

@@ -161,6 +161,7 @@ model Batch {
   weights     WeightLog[]
   notes       BatchNote[]
   photos      BatchPhoto[]
+  facilityPlants FacilityPlant[]
 
   createdAt   DateTime  @default(now())
   updatedAt   DateTime  @updatedAt
@@ -610,6 +611,7 @@ model FacilityPlant {
   id          String   @id @default(uuid())
   tagNumber   String   @unique // METRC tag
   batchId     String?
+  batch       Batch?   @relation(fields: [batchId], references: [id])
   position    FacilityPosition @relation(fields: [positionId], references: [id])
   positionId  String   @unique
   address     String   // Full hierarchical address

backend/src/routes/audit.routes.ts

@@ -8,8 +8,8 @@ const prisma = new PrismaClient();
 function extractClientInfo(request: FastifyRequest) {
     return {
         ipAddress: request.ip,
-        userAgent: request.headers['user-agent'] || null,
-        sessionId: (request as any).sessionId || null
+        userAgent: request.headers['user-agent'] || undefined,
+        sessionId: (request as any).sessionId || undefined
     };
 }
 

backend/src/routes/insights.routes.ts

@@ -151,16 +151,20 @@ export async function insightsRoutes(fastify: FastifyInstance) {
 
                 // Get batch info
                 const batch = await prisma.batch.findUnique({
-                    where: { id: batchId },
-                    include: {
-                        plants: true
-                    }
+                    where: { id: batchId }
                 });
 
                 if (!batch) {
                     return reply.status(404).send({ error: 'Batch not found' });
                 }
 
+                // Get actual plant count from facility plants
+                const actualPlantCount = await prisma.facilityPlant.count({
+                    where: { batchId }
+                });
+
+                const effectivePlantCount = actualPlantCount > 0 ? actualPlantCount : (batch.plantCount || 0);
+
                 // Get environment data if available
                 let envData: any = {};
 
@@ -190,7 +194,7 @@ export async function insightsRoutes(fastify: FastifyInstance) {
 
                 const result = predictYield({
                     strain: batch.strain || 'default',
-                    plantCount: batch.plants?.length || batch.plantCount || 0,
+                    plantCount: effectivePlantCount,
                     stage: batch.stage || 'VEG',
                     daysInStage,
                     ...envData
@@ -212,7 +216,7 @@ export async function insightsRoutes(fastify: FastifyInstance) {
                         name: batch.name,
                         strain: batch.strain,
                         stage: batch.stage,
-                        plantCount: batch.plants?.length || batch.plantCount
+                        plantCount: effectivePlantCount
                     },
                     environment: envData
                 };

backend/src/routes/layout.routes.ts

@@ -250,18 +250,7 @@ export async function layoutRoutes(fastify: FastifyInstance, options: FastifyPlu
                     include: {
                         positions: {
                             include: {
-                                plant: {
-                                    include: {
-                                        batch: {
-                                            select: {
-                                                id: true,
-                                                name: true,
-                                                strain: true,
-                                                stage: true
-                                            }
-                                        }
-                                    }
-                                }
+                                plant: true
                             },
                             orderBy: [{ row: 'asc' }, { column: 'asc' }]
                         }

backend/src/routes/messaging.routes.ts

@@ -45,14 +45,20 @@ export async function messagingRoutes(fastify: FastifyInstance) {
 
                 const announcements = await prisma.announcement.findMany({
                     where: {
+                        AND: [
+                            {
                                 OR: [
                                     { targetRoles: { isEmpty: true } }, // No targeting = everyone
                                     { targetRoles: { has: userRole } }
-                        ],
+                                ]
+                            },
+                            {
                                 OR: [
                                     { expiresAt: null },
                                     { expiresAt: { gt: new Date() } }
                                 ]
+                            }
+                        ]
                     },
                     include: {
                         createdBy: { select: { id: true, name: true } },