feat(nofxi): Phase 3 complete - Exchange factory, Web UI, Strategy runner, Docker

Exchange Factory:
- CreateTrader() supports Binance/OKX/Bybit/Bitget/KuCoin/Gate
- Auto-registers traders from config on startup
- Direct import of nofx/trader packages (merged into main module)

Web UI:
- Dark theme chat interface at :8900
- Quick action sidebar (analyze, watch, positions, balance)
- Real-time health check indicator
- Mobile responsive

Strategy Runner:
- /strategy start BTC 1h - AI auto-analyzes on interval
- /strategy stop <id> - stop strategy
- /strategy list - view active strategies
- Notifications pushed to Telegram on signals
- Configurable intervals: 15m/30m/1h/4h

Docker:
- Multi-stage Dockerfile (alpine, ~20MB)
- docker-compose.yml with volume persistence

Bug fixes:
- Fixed panic on empty exchanges config
- Fixed thinking mode response parsing (qwen3 content:null)
- Added request timeout (55s) in Telegram handler
- Better error logging

nofxi/config.yaml

@@ -0,0 +1,20 @@
+agent:
+  name: "NOFXi"
+  language: "zh"
+  log_level: "info"
+  web_port: 8900
+
+telegram:
+  token: "8486603557:AAEqw9whg6uG63ROGCRJbz8D_J0lsXeQKps"
+  allowed_ids: []
+
+llm:
+  provider: "dashscope"
+  base_url: "https://coding.dashscope.aliyuncs.com/v1"
+  api_key: "sk-sp-0511a0b965af4866831a0345e8109ea0"
+  model: "qwen3-coder-plus"
+
+database:
+  path: "nofxi.db"
+
+exchanges: []