feat: add provider column, commission tracking, and report provider filter

- Claims & Payments: save npiProviderId when submitting MH claim; sync between claim and payment on update
- Claims table: add Provider column showing rendering provider name
- Payments table: add Provider column + purple Commissioned badge on status
- Claim edit modal: add Rendering Provider dropdown (defaults to Mary Scannell)
- Payment edit modal: add Rendering Provider dropdown + Commissioned metadata display
- Reports page: add Provider filter dropdown (dynamic from NPI providers settings)
- Reports page: remove Collections by Doctor report type and Select Doctor dropdown
- Commission section: new section in reports page with date range + provider filter, shows eligible paid claims/payments per provider, multi-select checkboxes, Pay Commission modal with print + save, marks payments as commissioned so they are excluded from future cycles
- DB: add CommissionBatch and CommissionBatchItem tables; backfill Payment.npiProviderId from linked claims
- Backend: PATCH /api/payments/:id/provider syncs to linked claim; PUT /api/claims/:id syncs to linked payment; new /api/commissions routes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/Backend/src/routes/payments.ts

@@ -200,10 +200,17 @@ router.post("/:claimId", async (req: Request, res: Response): Promise<any> => {
 
     const claimId = parseIntOrError(req.params.claimId, "Claim ID");
 
+    // Inherit npiProviderId from the linked claim so commission queries work
+    const linkedClaim = await prisma.claim.findUnique({
+      where: { id: claimId },
+      select: { npiProviderId: true },
+    });
+
     const validated = insertPaymentSchema.safeParse({
       ...req.body,
       claimId,
       userId,
+      ...(linkedClaim?.npiProviderId ? { npiProviderId: linkedClaim.npiProviderId } : {}),
     });
 
     if (!validated.success) {
@@ -427,6 +434,48 @@ router.patch(
   }
 );
 
+// PATCH /api/payments/:id/provider
+router.patch(
+  "/:id/provider",
+  async (req: Request, res: Response): Promise<any> => {
+    try {
+      const userId = req.user?.id;
+      if (!userId) return res.status(401).json({ message: "Unauthorized" });
+
+      const paymentId = parseIntOrError(req.params.id, "Payment ID");
+      const { npiProviderId } = req.body;
+
+      const existing = await storage.getPayment(paymentId);
+      if (!existing) return res.status(404).json({ message: "Payment not found" });
+
+      // Update payment and linked claim atomically so the claims form
+      // picks up the new provider when it prefills from the existing claim.
+      const ops: Parameters<typeof prisma.$transaction>[0] = [
+        prisma.payment.update({
+          where: { id: paymentId },
+          data: { npiProviderId: npiProviderId ?? null, updatedById: userId },
+          include: { npiProvider: true },
+        }),
+      ];
+
+      if (existing.claimId) {
+        ops.push(
+          prisma.claim.update({
+            where: { id: existing.claimId },
+            data: { npiProviderId: npiProviderId ?? null },
+          }) as any
+        );
+      }
+
+      const [updated] = await prisma.$transaction(ops);
+      return res.json(updated);
+    } catch (err: unknown) {
+      const message = err instanceof Error ? err.message : "Failed to update provider";
+      return res.status(500).json({ message });
+    }
+  }
+);
+
 // PATCH /api/payments/:id/mh-paid-amount
 router.patch(
   "/:id/mh-paid-amount",