feat(web): add Privacy Policy and Terms of Service pages

- Create /chinh-sach-bao-mat (Privacy Policy) with 10 sections
- Create /dieu-khoan-su-dung (Terms of Service) with 11 sections
- Add legal link group to footer (vi + en i18n)
- Add legalLinks prop to Footer for bottom-bar display
- Wire links into public layout

Co-Authored-By: Paperclip <noreply@paperclip.ing>

prisma/migrations/20260423000000_add_vnbds_compliance_fields/migration.sql

@@ -0,0 +1,24 @@
+-- Migration: 20260423000000_add_vnbds_compliance_fields
+-- Luật Kinh doanh BĐS 2023, Điều 6-7 + Nghị định 96/2024, Điều 62
+
+CREATE TYPE "BrokerCertStatus" AS ENUM (
+  'UNVERIFIED', 'PENDING_REVIEW', 'VERIFIED', 'EXPIRED', 'REVOKED'
+);
+
+ALTER TABLE "Property"
+  ADD COLUMN "certificateNumber"   TEXT,
+  ADD COLUMN "certificateIssuedAt" TIMESTAMP(3),
+  ADD COLUMN "certificateIssuedBy" TEXT,
+  ADD COLUMN "hasMortgage"         BOOLEAN NOT NULL DEFAULT FALSE,
+  ADD COLUMN "hasDispute"          BOOLEAN NOT NULL DEFAULT FALSE,
+  ADD COLUMN "legalEncumbrances"   TEXT;
+
+ALTER TABLE "Agent"
+  ADD COLUMN "brokerCertNumber"   TEXT,
+  ADD COLUMN "brokerCertIssuedAt" TIMESTAMP(3),
+  ADD COLUMN "brokerCertExpiryAt" TIMESTAMP(3),
+  ADD COLUMN "brokerCertStatus"   "BrokerCertStatus" NOT NULL DEFAULT 'UNVERIFIED',
+  ADD COLUMN "brokerCertDocUrl"   TEXT;
+
+CREATE INDEX "Agent_brokerCertStatus_idx" ON "Agent"("brokerCertStatus");
+CREATE INDEX "Agent_brokerCertExpiryAt_idx" ON "Agent"("brokerCertExpiryAt");