Polish: A11y-, Motion- & Deep-Linking-Sweep (Web Interface Guidelines)

Aus dem web-design-guidelines-Audit über das ganze Frontend:

P1 — index.css: prefers-reduced-motion-Block (Animationen/Transitions aus),
color-scheme dark/light, zwei `transition: all` → explizite Properties,
globaler :focus-visible-Ring. Formular-aria-labels (SystemDrawer-Passwörter
inkl. name/autocomplete/spellCheck, Memory, Connect, ModelBrowse, LaneEditor,
CustomDialog). Icon-Button-aria-labels + dekorative Icons aria-hidden.

P2 — Memory-Lösch-Bestätigung (war sofort), overscroll-behavior:contain auf
Modals (CustomDialog/Agent/Cockpit/CommandPalette), ModelBrowse fmtN → Intl.NumberFormat.

P3 — Deep-Linking: top-level View im URL-Hash (#models), Reload/Teilen/Cmd-Klick
funktionieren; Sidebar-Nav als <a href="#id"> (echte Links, aria-current),
hashchange-Sync; index.css-Aktiv-Selektoren button→a nachgezogen.

Verifiziert: npm run build (tsc strict) clean; live gegen die Box (Hash-Nav,
Reload-Persistenz, aria-current, Aktiv-Styling teal+Akzent, keine Konsolenfehler).

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

frontend/src/views/AgentView.tsx

@@ -250,7 +250,7 @@ export function AgentView() {
 
       {/* Brain Selection Modal — eine Stelle für den Hirn-Wechsel (warm-bewusst + Alias) */}
       {s && showBrainSelect && (
-        <div className="fixed inset-0 z-50 bg-black/60 backdrop-blur-sm flex items-center justify-center p-4">
+        <div className="fixed inset-0 z-50 bg-black/60 backdrop-blur-sm flex items-center justify-center p-4 overscroll-contain" role="dialog" aria-modal="true" aria-label="Hermes-Hirn konfigurieren">
           <div className="w-full max-w-md rounded-2xl border border-border/80 bg-card p-6 shadow-2xl space-y-4 animate-in fade-in zoom-in-95 duration-200">
             <div className="flex items-center justify-between border-b border-border/20 pb-2">
               <h3 className="text-xs font-bold uppercase tracking-wider text-primary flex items-center gap-1.5">