chore(agents): sync agent configs — model updates to nemotron-3-super

- Update agent model assignments (nemotron-3-ultra -> nemotron-3-super) across .kilo/agents, kilo-meta.json, kilo.jsonc, capability-index.yaml
- Sync agent descriptions in KILO_SPEC.md

.kilo/agents/smartadmin-builder.md

@@ -1,7 +1,7 @@
 ---
 description: SmartAdmin template builder — generates and edits admin panel EJS templates using the 721-component SmartAdmin library. Understands component classes, page structure, and produces backend-ready frontend pages.
 mode: subagent
-model: ollama-cloud/qwen3.5:397b
+model: ollama-cloud/deepseek-v4-flash:0731
 variant: thinking
 variant_strategy: task_size_based
 color: "#2563EB"