feat(frontend): Ambient/WebGL console revamp + lint/type cleanup

Ground-up rebuild of the GMW frontend as an Ambient Field console:
- WebGL ambient background (Three.js shader, drifting motes, reduced-motion aware)
- Glassmorphism dark cyber theme across all 8 routes
- SSR page + client view split with SWR fallback; realtime via WebSocket
- Command palette (Cmd+K), chatbot FAB, guild/channel pickers
- Chart primitives: donut, radial-gauge, area-activity, sparkline, equalizer

Cleanup (review pass):
- Remove stray Puppeteer nav-test/nav-debug scripts
- Replace non-null assertions with guards (dashboard/moderation)
- Drop unused useGuilds fetches in messages/voice views
- Type implicit-any `let` declarations across pages
- Add a11y roles/labels to SVG charts and audio, tidy imports

services/frontend/src/hooks/use-dashboard.ts

@@ -65,15 +65,15 @@ export function useChannels(guildId?: string, search?: string) {
 
 export function useUserDetail(userId: string | null) {
   return useSWR<DashboardUserDetail>(
-    userId ? ["dashboard-user", userId] : null,
-    () => dashboardApi.getUserDetail(userId!),
+    userId ? (["dashboard-user", userId] as const) : null,
+    () => dashboardApi.getUserDetail(userId ?? ""),
   );
 }
 
 export function useChannelDetail(channelId: string | null) {
   return useSWR<DashboardChannelDetail>(
-    channelId ? ["dashboard-channel", channelId] : null,
-    () => dashboardApi.getChannelDetail(channelId!),
+    channelId ? (["dashboard-channel", channelId] as const) : null,
+    () => dashboardApi.getChannelDetail(channelId ?? ""),
   );
 }