no nap tool — recv with long wait_seconds replaces it; max raised to 180s

recv-with-timeout is strictly better than a fixed sleep because it
wakes instantly on incoming messages. drop the half-written nap MCP
tool, raise the recv wait_seconds cap from 60s to 180s on both
agent and manager sockets.

prompts updated: agent.md + manager.md now spell out the pattern —
when there's nothing else useful to do, call recv with
wait_seconds=180 to park the turn; do NOT use Bash sleep for the
same purpose. todo drops the nap entry and the napping-state-badge
follow-up; both replaced by 'just use a long recv'.

TODO.md

@@ -27,10 +27,6 @@ Pick anything from here when relevant. Cross-cutting design notes live in
 
 ## UI / UX
 
-- **State badge: napping state.** Idle / thinking / compacting
-  already ship from server-side `TurnState`. Add `napping 😴`
-  once the `nap` tool exists — it just adds a new `TurnState`
-  variant the harness flips into for the duration of the nap.
 - **Terminal: `/model` slash command.** Operator-typeable model
   override from the terminal. Depends on the model-override work
   above; once an override mechanism exists, wire a `/model <name>`
@@ -81,14 +77,6 @@ Pick anything from here when relevant. Cross-cutting design notes live in
 
 ## Loop substance
 
-- **`nap` tool.** Agent-side MCP tool `mcp__hyperhive__nap(seconds)` that
-  parks the turn loop for a short while before next-message processing.
-  Use cases: agent decides it has nothing useful to do, or wants to
-  throttle itself between rapid wake events. Implementation: harness
-  records a "wake-not-before" timestamp; `recv_blocking` skips the long
-  poll until that ts; the state badge reads `napping · MM:SS` during.
-  Operator can cancel via the same `/cancel` slash command or a
-  dashboard button.
 - **Notes compaction.** `/state/` is bind-mounted persistently and agents
   are told (in the system prompt) to keep `/state/notes.md` for durable
   knowledge — but we don't currently nudge them to compact when notes