Phase 1: scaffold Next.js 16 web-ui + Coolify staging

- create-next-app with TypeScript, Tailwind v4, App Router
- Port design-system.css tokens into Tailwind @theme (navy/gold/parchment, Heebo)
- Install TanStack Query, react-hook-form, zod, lucide-react, react-dropzone
- layout.tsx: RTL Hebrew + Heebo via next/font/google
- AppShell component with navy header + gold rule + nav
- next.config.ts: output:standalone + rewrites to proxy /api/* to production FastAPI
- Dockerfile: multi-stage Node 20 Alpine build for Next.js standalone
  (branch-local override of the FastAPI Dockerfile; main is unaffected)
- Switch .taskmaster to claude-code provider (no API key required)
- Add 7 phase tasks (83-89) tracking the full rewrite plan

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.taskmaster/config.json

@@ -1,20 +1,20 @@
 {
   "models": {
     "main": {
-      "provider": "anthropic",
-      "modelId": "claude-opus-4-20250514",
-      "maxTokens": 64000,
+      "provider": "claude-code",
+      "modelId": "opus",
+      "maxTokens": 32000,
       "temperature": 0.2
     },
     "research": {
-      "provider": "anthropic",
-      "modelId": "claude-sonnet-4-20250514",
-      "maxTokens": 64000,
+      "provider": "claude-code",
+      "modelId": "opus",
+      "maxTokens": 32000,
       "temperature": 0.1
     },
     "fallback": {
-      "provider": "anthropic",
-      "modelId": "claude-sonnet-4-20250514",
+      "provider": "claude-code",
+      "modelId": "sonnet",
       "maxTokens": 64000,
       "temperature": 0.2
     }