fix: build speed, observer AI details, round tracker empty state

- Disable typedRoutes and skip TS in build (run tsc separately) — build
  drops from ~9min to ~36s
- Expand optimizePackageImports for sonner, date-fns, recharts, motion, zod
- Docker: mount .next/cache as build cache for faster rebuilds
- Observer filtering panel: fix AI reasoning extraction (nested under rule ID)
  and show confidence, quality score, spam risk, override reason
- Round User Tracker: show empty state message instead of disappearing when
  selected round has no passed projects yet

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

next.config.ts

@@ -2,10 +2,21 @@ import type { NextConfig } from 'next'
 
 const nextConfig: NextConfig = {
   output: 'standalone',
-  typedRoutes: true,
   serverExternalPackages: ['@prisma/client', 'minio'],
+  typescript: {
+    // We run tsc --noEmit separately before each push
+    ignoreBuildErrors: true,
+  },
   experimental: {
-    optimizePackageImports: ['lucide-react'],
+    optimizePackageImports: [
+      'lucide-react',
+      'sonner',
+      'date-fns',
+      'recharts',
+      'motion/react',
+      'zod',
+      '@radix-ui/react-icons',
+    ],
   },
   images: {
     remotePatterns: [