chore(agents): sync agent configs, models, capability index; cleanup junk

- Update agent model assignments (minimax/glm -> nemotron-3-ultra, kimi-k2.7-code, qwen3.5:397b) in .kilo/agents, kilo-meta.json, kilo.jsonc, capability-index.yaml
- Update orchestrator/agent prompts (complexity fast-path, verification tests, close-loop audit)
- Add .kilo/KILO_SPEC.md (Kilo Code specification reference)
- AGENTS.md: consolidate smartadmin agent rows
- Remove screenshot-dash.cjs (unused, contained hardcoded admin token); gitignore it
- Remove empty .kilo/milestones/

.kilo/agents/history-miner.md

@@ -1,7 +1,7 @@
 ---
 description: Analyzes git history to find duplicates and past solutions, preventing regression and duplicate work (GNS-2 Tier 0)
 mode: all
-model: ollama-cloud/glm-5.2
+model: ollama-cloud/deepseek-v4-flash:0731
 color: "#059669"
 permission:
   read: allow