Summary

• Replace interactive onboarding with bootstrap greeting: Fresh workspaces receive a proactive LLM greeting that naturally profiles the user through conversation, replacing the old onboarding_chat.rs engine
• Workspace seed files: Identity documents (AGENTS.md, SOUL.md, BOOTSTRAP.md, etc.) seeded from src/workspace/seeds/ instead of hardcoded strings
• Routine advisor integration: Event-triggered routines and profile evolution support
• Quick-mode env detection: Setup wizard now detects NEARAI_API_KEY, ANTHROPIC_API_KEY, OPENAI_API_KEY, and LLM_BACKEND env vars, skipping redundant provider prompts during onboarding
• Bootstrap history fix: Bootstrap greeting now persists both user message and assistant response to the same conversation thread, so the first message appears when reloading the gateway
• Web UI cleanup: Consolidated duplicate event delegation handlers; moved thread action buttons ("+" / "<<") into the "Conversations" header line

Security (addressed in review)

• Identity file write protection restored via Sanitizer::detect() scanning
• sync_profile_documents() sanitized before writing to system-prompt-injected files
• Profile evolution prompt hardened with <user_data> delimiters
• context/assistant-directives.md added to injection-scanned file set

Builds on the NPA psychographic profiling work from #321.

Test plan

• cargo fmt — no formatting issues
• cargo clippy --all --benches --tests --examples --all-features — zero warnings
• cargo test — unit tests pass
• E2E trace added for bootstrap greeting flow
• Manual: verify fresh workspace triggers bootstrap greeting
• Manual: verify NEARAI_API_KEY in env skips provider prompt during onboarding
• Manual: verify gateway reload shows first onboarding message in history

Closes #321

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