feat(gateway): add sender presence tracking

docs/plans/2026-02-06-openclaw-feature-gap-analysis.md

@@ -233,7 +233,7 @@ Flynn actually has MCP support that OpenClaw doesn't emphasise — OpenClaw reli
 |---------|----------|-------|--------|
 | Streaming & chunking | Full (per-channel limits) | Full (streaming + per-channel chunking) | **MATCH** |
 | Typing indicators | Full | Telegram, Discord, WhatsApp (per-adapter) | **MATCH** |
-| Presence tracking | Full | -- | **MISSING** |
+| Presence tracking | Full | Full (`system.presence` with online/offline inference from recent sender activity) | **MATCH** |
 | Web UI token dashboard | Usage visualization (v2026.2.6) | Full (Usage page with summary cards, per-session table, auto-refresh) | **MATCH** |
 | Usage tracking / cost | Full | Full (per-tier tokens, estimated cost via MODEL_COSTS) | **MATCH** |
 | Markdown rendering | Per-channel formatting | Full (TUI markdown renderer + channel-specific) | **MATCH** |
@@ -261,8 +261,8 @@ Flynn actually has MCP support that OpenClaw doesn't emphasise — OpenClaw reli
 | Skills/Plugins | 5 | 4 | 0 | 1 |
 | Gateway/Infra | 13 | 8 | 0 | 5 |
 | Chat Commands | 6 | 6 | 0 | 0 |
-| Misc | 10 | 9 | 0 | 1 |
-| **TOTAL** | **128** | **100 (78%)** | **0 (0%)** | **28 (22%)**  |
+| Misc | 10 | 10 | 0 | 0 |
+| **TOTAL** | **128** | **101 (79%)** | **0 (0%)** | **27 (21%)**  |
 
 *Note: Match rate improved from 77% to 78% after implementing setup wizard (`flynn setup` + first-run auto-trigger).*
 
@@ -314,7 +314,6 @@ All five Tier 3 items implemented: Lane Queue (per-session FIFO in gateway), cre
 - ~~Onboard wizard — guided setup~~ (DONE — `flynn setup` + first-run auto-trigger, 2026-02-10)
 - ClawHub/skill registry — community marketplace
 - QMD backend — experimental memory search
-- Presence tracking — online/offline status
 
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