Add direct Blender surface placement tools

[Ker102]

Summary

• Add direct Blender tools for world-space support-surface placement and AABB clearance validation.
• Wire the tools through addon copies, agent schemas, registry/filter routing, system prompt, spatial guide, and capability inventory.
• Add focused coverage for addon exposure, routing, prompt formatting, and tool-guide binding.

Validation

• python -m py_compile desktop/assets/vipermesh-addon.py public/downloads/vipermesh-addon.py
• npx tsx scripts/test/test-blender-surface-alignment-tool.ts
• npx tsx scripts/test/test-blender-clearance-validation-tool.ts
• npx tsx scripts/test/test-tool-guide-trigger-coverage.ts
• npx tsx scripts/test/test-blender-capability-inventory.ts
• npx tsc --noEmit --incremental false
• npm run lint (passes; existing baseline-browser-mapping freshness warning)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 1ca46664-5c16-4e1d-8965-ad63a293139d

📥 Commits

Reviewing files that changed from the base of the PR and between 1a2b8e6 and 4906b12.

📒 Files selected for processing (11)

• data/tool-guides/spatial-positioning-guide.md
• desktop/assets/vipermesh-addon.py
• docs/blender-mcp-capability-inventory.md
• lib/ai/agents.ts
• lib/orchestration/prompts/blender-agent-system.md
• lib/orchestration/tool-filter.ts
• lib/orchestration/tool-registry.ts
• public/downloads/vipermesh-addon.py
• scripts/test/test-blender-clearance-validation-tool.ts
• scripts/test/test-blender-surface-alignment-tool.ts
• scripts/test/test-tool-guide-trigger-coverage.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/blender-object-grounding-tools

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