Remove tool-call-like examples from prompts

Improve prompt resilience and project context use

Comprehensive documentation update ...

- websocket.md: add heartbeat, session_sync, replay_start/end, planning_status,
  plan_ready (with is_subagent), stream_end extra fields, context_compressed summary,
  updated _AgentRun.events replay buffer, corrected reconnect section
- sessions.md: add name, planning_logs fields; message flags (is_plan, is_compression,
  is_summary, thinking); set_name store op; debug endpoints section
- api.md: full rewrite — add generate-name, planning, file download endpoints;
  all missing WS events; correct message field table with is_plan/is_compression
- tools.md: update user tools list with all current tools
- index.md: fix profiles list (smart_home → developer)
- CLAUDE.md: add Documentation section with table of all docs files
- NAVI.md: add architecture.md entry, improve websocket description

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Add NAVI.md navigation hub and update core docs ...

NAVI.md: lightweight project entry point for Navi — server command,
key paths, doc map with query instructions, tool manual index.
All profiles read this; detailed content stays in docs/.

docs/agent.md: rewrite to cover 3-phase planning, all 10 thinking
mechanics flags, adaptive replan, anti-stall, goal anchoring.

docs/profiles.md: update AgentProfile fields (all flags), correct
profile list (secretary/server_admin/developer), JSON config format,
auto-discovery instead of manual registration.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>