feat(sprint-5.5): add NestJS API, BlockMetaBar, block components + fix Vercel build

- Add vercel.json to build only apps/web (fix Vercel build failure)
- NestJS API: BlocksModule, BlocksController, BlocksService with Prisma 7
- PostgreSQL migration: Block model (path, version, isInPreview)
- BlockMetaBar component: inline version edit, API fetch with offline fallback
- New block components: CeoBlock, ContactFormsBlock, FooterBlock, NewsBlock, ReviewsBlock
- PreviewClient: fetch isInPreview from API, block visibility toggle
- Pages updated: hero, doctors, ceo, contact-forms, contact, news, reviews
- docker-compose: PostgreSQL on port 5434

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

apps/api/prisma/migrations/20260323120441_add_block_model/migration.sql

@@ -0,0 +1,53 @@
+-- CreateEnum
+CREATE TYPE "Role" AS ENUM ('viewer', 'editor');
+
+-- CreateEnum
+CREATE TYPE "ComponentStatus" AS ENUM ('draft', 'review', 'approved');
+
+-- CreateTable
+CREATE TABLE "User" (
+    "id" TEXT NOT NULL,
+    "email" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "passwordHash" TEXT NOT NULL,
+    "role" "Role" NOT NULL DEFAULT 'viewer',
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "User_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "ExperimentalComponent" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "baseComponent" TEXT NOT NULL,
+    "attributes" JSONB NOT NULL,
+    "status" "ComponentStatus" NOT NULL DEFAULT 'draft',
+    "authorId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "ExperimentalComponent_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Block" (
+    "id" TEXT NOT NULL,
+    "path" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "version" TEXT NOT NULL,
+    "isInPreview" BOOLEAN NOT NULL DEFAULT false,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "Block_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_email_key" ON "User"("email");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Block_path_key" ON "Block"("path");
+
+-- AddForeignKey
+ALTER TABLE "ExperimentalComponent" ADD CONSTRAINT "ExperimentalComponent_authorId_fkey" FOREIGN KEY ("authorId") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

apps/api/prisma/migrations/migration_lock.toml

@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"