feat: 补全剩余 6 个 StreamField Block 前端渲染 (ProductCard/Pricing/Timeline/Team/TechStack/Video)

- types/wagtail.ts 新增对应 6 个 Block 值类型接口及 StreamFieldBlock 联合类型分支
- 新建 6 个渲染组件：ProductCardGrid/Pricing/Timeline/Team/TechStack/Video，风格与既有 Block 一致
- BlockRenderer.tsx 映射表接入新组件，key 与后端 COMMON_BLOCKS 保持一致
- lint/build 均验证通过

blocks/pricing/Pricing.tsx

@@ -0,0 +1,51 @@
+import Link from "next/link";
+import type { PricingBlockValue } from "@/types/wagtail";
+
+export default function Pricing({ value }: { value: PricingBlockValue }) {
+  return (
+    <section className="bg-slate-50 py-24">
+      <div className="mx-auto max-w-7xl px-6">
+        {value.heading && (
+          <h2 className="mb-16 text-center text-4xl font-bold text-slate-900">
+            {value.heading}
+          </h2>
+        )}
+        <div className="grid gap-8 lg:grid-cols-3">
+          {value.plans?.map((plan, index) => (
+            <div
+              key={`${plan.name}-${index}`}
+              className={`flex flex-col rounded-3xl border p-8 shadow-sm ${
+                plan.highlighted
+                  ? "border-primary bg-white ring-2 ring-primary"
+                  : "border-slate-100 bg-white"
+              }`}
+            >
+              <h3 className="mb-2 text-xl font-semibold text-slate-900">
+                {plan.name}
+              </h3>
+              <div className="mb-6 text-3xl font-bold text-primary">{plan.price}</div>
+              <ul className="mb-8 flex-1 space-y-3">
+                {plan.features?.map((feature, featureIndex) => (
+                  <li
+                    key={`${feature}-${featureIndex}`}
+                    className="text-sm text-slate-600"
+                  >
+                    {feature}
+                  </li>
+                ))}
+              </ul>
+              {plan.button && (
+                <Link
+                  href={plan.button.link}
+                  className="rounded-2xl bg-primary px-6 py-3 text-center text-white"
+                >
+                  {plan.button.text}
+                </Link>
+              )}
+            </div>
+          ))}
+        </div>
+      </div>
+    </section>
+  );
+}