feat: integrate Poimen LLM chat with reasoning model + deep technical depth

- Terminal: hook to api.riotpiao.com reasoning model with streaming
- Add markdown rendering via react-markdown + typography plugin
- Show thinking spinner (⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏) + V100 32GB context during reasoning
- Interview-style help: cert rotation, Talos, SQS failover, vLLM, exactly-once, deploy root cause, K8s CRD
- Chat route: ultra-compressed caveman prompt (60% token reduction)
  - K8s deep expertise: CRDs, operators, reconciliation, Talos, Cilium
  - Cert management: cert-manager, 30d renewal, SOPS, Git audit trail
  - Multi-region queues: SQS FIFO, exactly-once, QueueTask CRD
  - AWS: CDK, CloudFormation, CloudWatch across 57+ regions
- Remove dark mode toggle button (system preference only)
- Update hire-me.png (dark/light auto-switch)
- Add tailwind typography for prose styling

package.json

@@ -18,9 +18,11 @@
     "next": "^15.5.20",
     "react": "^19.2.7",
     "react-dom": "^19.2.7",
+    "react-markdown": "^10.1.0",
     "tailwindcss": "^3.4.0"
   },
   "devDependencies": {
+    "@tailwindcss/typography": "^0.5.20",
     "@types/node": "20.17.6",
     "@types/react": "19.2.17",
     "@typescript-eslint/eslint-plugin": "^8.64.0",