Set community gap to 16px, add dingyi China tweet to blog post (#279)

- Fix community section gap (6px → 16px)
- Add dingyi tweet showing cmux went semi-viral in China
- Change "semi-viral in Japan" to "viral in Japan" + "semi-viral in China"

web/app/blog/show-hn-launch/page.tsx

@@ -159,7 +159,7 @@ export default function ShowHNLaunchPage() {
       </blockquote>
 
       <p>
-        Surprisingly, cmux went semi-viral in Japan!
+        Surprisingly, cmux went viral in Japan:
       </p>
 
       <Tweet id="2025129675262251026" />
@@ -171,6 +171,12 @@ export default function ShowHNLaunchPage() {
         it has its own notification system.&quot;
       </p>
 
+      <p>
+        And semi-viral in China:
+      </p>
+
+      <Tweet id="2024867449947275444" />
+
       <p>
         Another exciting thing was seeing people build on top of the cmux
         CLI. sasha built a pi-cmux extension that shows model info, token

web/app/components/spacing-control.tsx

@@ -27,7 +27,7 @@ const defaults: DevValues = {
   featuresLh: 1.275,
   featuresPt: 12,
   featuresPb: 15,
-  communityGap: 6,
+  communityGap: 16,
   faqPt: 0,
   docsPt: 8,
 };

web/app/page.tsx

@@ -201,7 +201,7 @@ export default function Home() {
           <h2 className="text-xs font-medium text-muted tracking-tight mb-3">
             Community
           </h2>
-          <ul data-dev="community-ul" className="text-[15px]" style={{ lineHeight: 1.5, display: "flex", flexDirection: "column", gap: 6 }}>
+          <ul data-dev="community-ul" className="text-[15px]" style={{ lineHeight: 1.5, display: "flex", flexDirection: "column", gap: 16 }}>
             {testimonials.map((t) => (
               <li key={t.url}>
                 <span>