feat: add Lab RX feature with template management and auto-seed defaults

- New lab_rx_template table with sortOrder and Prisma migrations
- Backend CRUD + reorder routes at /api/lab-rx/templates
- Auto-seeds 3 Highland Dental Studio defaults on first use per user
- LabRxModal: template picker, inline rename, up/down reorder, full
  template form with sections (Template Name / Lab Info / Case Details)
- RX popup: Tooth Number, Shade, Due Date, Doctor (from NPI providers),
  Instructions pre-filled with "Please make / Thank you!", print output
- lab-rx-templates.ts config file for future git-managed additions

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

packages/db/prisma/migrations/20260702000000_add_lab_rx_template/migration.sql

@@ -0,0 +1,24 @@
+-- CreateTable
+CREATE TABLE "lab_rx_template" (
+    "id" SERIAL NOT NULL,
+    "userId" INTEGER NOT NULL,
+    "name" TEXT NOT NULL,
+    "labName" TEXT,
+    "labPhone" TEXT,
+    "labFax" TEXT,
+    "labAddress" TEXT,
+    "labAccount" TEXT,
+    "caseType" TEXT,
+    "material" TEXT,
+    "instructions" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "lab_rx_template_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "lab_rx_template_userId_idx" ON "lab_rx_template"("userId");
+
+-- AddForeignKey
+ALTER TABLE "lab_rx_template" ADD CONSTRAINT "lab_rx_template_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

packages/db/prisma/migrations/20260702000001_add_lab_rx_sort_order/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "lab_rx_template" ADD COLUMN "sortOrder" INTEGER NOT NULL DEFAULT 0;

packages/db/prisma/migrations/20260702000002_add_lab_rx_doctor_name/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "lab_rx_template" ADD COLUMN "doctorName" TEXT;