Remove unused persona marketplace and discover page files.

public/css/style.css

@@ -418,6 +418,7 @@ input:focus, textarea:focus, select:focus { border-color: var(--brand); }
 }
 .chat-context-item > span { color: var(--text-muted); font-size: .58rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
 .chat-context-item > strong { max-width: 140px; overflow: hidden; color: var(--text-soft); font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
+.chat-context-item select { min-width: 0; max-width: 260px; padding: 0; border: 0; background: transparent; color: var(--personality-accent,var(--text-soft)); font: 700 .72rem "Manrope",sans-serif; }
 .chat-context-button { min-height: 0; border: 0; color: inherit; text-align: left; justify-content: start; }
 .chat-context-button:hover:not(:disabled) { background: var(--surface-hover); }
 .chat-header-actions { display: flex; align-items: center; }
@@ -654,7 +655,9 @@ input:focus, textarea:focus, select:focus { border-color: var(--brand); }
     .chat-sidebar { position: fixed; inset: 0 auto 0 0; z-index: 80; width: min(340px, 90vw); transform: translateX(-104%); transition: transform .2s ease; box-shadow: var(--shadow-lg); }
     body.sidebar-open .chat-sidebar { transform: translateX(0); }
     .sidebar-toggle { display: inline-flex; }
-    .chat-header-context { display: none; }
+    .chat-header-context { display: flex; }
+    .chat-title-block { flex-direction: column; align-items: flex-start; justify-content: center; gap: 6px; }
+    .chat-context-item select { max-width: min(68vw,260px); }
     .settings-layout { grid-template-columns: 1fr; }
     .settings-nav { position: static; display: flex; overflow-x: auto; }
     .settings-nav-item { flex: 0 0 auto; }