Cap epitomic image width; let intro text fill wide screens

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/datasets/protein/ProteinDashboard.tsx

@@ -333,7 +333,7 @@ export function ProteinDashboard() {
               {/* Brief database introduction — borderless, no frame */}
               <section className="px-1">
                 <h1 className="text-2xl font-semibold text-slate-900">MuSProt — Multistate Protein Database</h1>
-                <p className="mt-2 max-w-4xl text-slate-600 leading-relaxed">
+                <p className="mt-2 text-slate-600 leading-relaxed">
                   <span className="font-semibold text-slate-900">MuSProt</span> (Multistate Protein Database) is a
                   million-scale multimodal database for multistate proteins, designed to support programmable protein
                   design and AI model development. It links experimentally observed conformational states of identical
@@ -348,7 +348,7 @@ export function ProteinDashboard() {
               <img
                 src="/api/protein/plots/epitomic.png?v=20260622"
                 alt=""
-                style={{ width: '100%', height: 'auto', display: 'block' }}
+                style={{ width: '100%', maxWidth: '640px', height: 'auto', display: 'block', margin: '0 auto' }}
               />
 
               {/* Search Panel Full Width */}