feat: add env setup wizard, fix docker-compose env passthrough and email from field

- Add interactive setup wizard (scripts/setup-env.js) with SQLite/PostgreSQL
  choice, AI provider config, email, MCP, admin account creation, and
  auto-switch of Prisma schema provider
- Fix docker-compose.yml: remove duplicate environment entries that overrode
  env_file values with empty strings (broke AI providers in Docker). Now only
  DATABASE_URL, NODE_ENV, NEXT_TELEMETRY_DISABLED remain in environment:
- Fix revalidateTag('system-config', '/settings') crash: Next.js 16 interprets
  the second arg as a cacheLife profile, not a path. Caused 500 on all admin
  settings saves
- Fix Resend "from" field: was building noreply@localhost which Resend rejects.
  Now uses SMTP_FROM from config, with localhost-aware fallback
- Add debug logging for auto-labeling background task
- Default DATABASE_URL changed from user:password to memento:memento

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -35,34 +35,10 @@ services:
     ports:
       - "3000:3000"
     environment:
+      # DATABASE_URL is auto-constructed from PostgreSQL credentials (not in .env.docker)
       - DATABASE_URL=postgresql://${POSTGRES_USER:-memento}:${POSTGRES_PASSWORD:-memento}@postgres:5432/${POSTGRES_DB:-memento}
-      - NEXTAUTH_SECRET=${NEXTAUTH_SECRET:-changethisinproduction}
-      - NEXTAUTH_URL=${NEXTAUTH_URL:-http://localhost:3000}
       - NODE_ENV=production
       - NEXT_TELEMETRY_DISABLED=1
-
-      # Email Configuration (SMTP)
-      - SMTP_HOST=${SMTP_HOST}
-      - SMTP_PORT=${SMTP_PORT:-587}
-      - SMTP_USER=${SMTP_USER}
-      - SMTP_PASS=${SMTP_PASS}
-      - SMTP_FROM=${SMTP_FROM:-noreply@memento.app}
-
-      # AI Providers
-      - AI_PROVIDER_TAGS=${AI_PROVIDER_TAGS}
-      - AI_PROVIDER_EMBEDDING=${AI_PROVIDER_EMBEDDING}
-      - AI_PROVIDER_CHAT=${AI_PROVIDER_CHAT}
-      - OPENAI_API_KEY=${OPENAI_API_KEY}
-      - OLLAMA_BASE_URL=${OLLAMA_BASE_URL}
-      - AI_MODEL_TAGS=${AI_MODEL_TAGS}
-      - AI_MODEL_EMBEDDING=${AI_MODEL_EMBEDDING}
-      - AI_MODEL_CHAT=${AI_MODEL_CHAT}
-      - CUSTOM_OPENAI_API_KEY=${CUSTOM_OPENAI_API_KEY}
-      - CUSTOM_OPENAI_BASE_URL=${CUSTOM_OPENAI_BASE_URL}
-      - ALLOW_REGISTRATION=${ALLOW_REGISTRATION:-true}
-      - RESEND_API_KEY=${RESEND_API_KEY}
-      - MCP_SERVER_MODE=${MCP_SERVER_MODE}
-      - MCP_SERVER_URL=${MCP_SERVER_URL}
     volumes:
       - uploads-data:/app/public/uploads
     depends_on:
@@ -100,10 +76,7 @@ services:
       # SSE mode exposes port 3001, stdio mode doesn't need ports
       - "3001:3001"
     environment:
-      # Mode: 'stdio' (default, for Claude Desktop) or 'sse' (for HTTP/N8N)
-      - MCP_MODE=${MCP_MODE:-stdio}
-      - PORT=${MCP_PORT:-3001}
-      # Database - connect to shared PostgreSQL
+      # DATABASE_URL is auto-constructed from PostgreSQL credentials (not in .env.docker)
       - DATABASE_URL=postgresql://${POSTGRES_USER:-memento}:${POSTGRES_PASSWORD:-memento}@postgres:5432/${POSTGRES_DB:-memento}
       - NODE_ENV=production
     depends_on:
@@ -113,7 +86,7 @@ services:
     networks:
       - memento-network
     healthcheck:
-      test: ["CMD-SHELL", "if [ \"${MCP_MODE}\" = 'sse' ]; then wget --spider -q http://localhost:3001/ || exit 1; else node -e \"console.log('healthy')\" || exit 1; fi"]
+      test: ["CMD-SHELL", "wget --spider -q http://localhost:3001/ || node -e \"console.log('healthy')\""]
       interval: 30s
       timeout: 10s
       retries: 3