fix: dev startup — Redis eviction policy, mana-media port crash, Svelte warnings

- Redis: allkeys-lru → noeviction to prevent silent data loss when memory full
- mana-media: --watch → --hot to fix EADDRINUSE crash on Bun HMR reload
- Svelte: build initial values before $state() to avoid state_referenced_locally warnings
  in create-app-onboarding.svelte.ts and shared-llm/store.svelte.ts

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

docker-compose.dev.yml

@@ -31,7 +31,7 @@ services:
     image: redis:7-alpine
     container_name: mana-redis
     restart: unless-stopped
-    command: redis-server --requirepass ${REDIS_PASSWORD:-devpassword} --maxmemory 256mb --maxmemory-policy allkeys-lru
+    command: redis-server --requirepass ${REDIS_PASSWORD:-devpassword} --maxmemory 256mb --maxmemory-policy noeviction
     volumes:
       - redis-data:/data
     ports: