web-ui: remove dead ask->operator inline-answer binding from the per-agent terminal

hyperhive#2922: the inline-answer slot (pendingAskBinds/reconcileAskBinds/
buildAnswerForm) depended on a since-removed /api/loose-ends endpoint
and had been silently non-functional the whole time — nothing ever
reassigned lastLooseEnds, so the reconciler always no-op'd.

Per mara's call on the issue (ask/answer is deprecated per #2850, only
the main dashboard UI needs to work, remove the broken per-agent inline
view): ripped out the dead JS (binding + form + CSS) rather than
restoring the endpoint. An ask tool call now renders like any other
tool call, no inline answer affordance; the operator answers via the
dashboard's own question surfacing.

Also fixed adjacent doc staleness this same removal made newly
contradictory (docs/web-ui/agent.md, docs/terminal-rendering.md):
the doc already described the loose-ends/bash-tasks flyouts and the
ask-binding as recently dead, but the endpoint reference table and a
header-pills bullet list still described them as live.

docs/web-ui/agent.md

@@ -62,15 +62,9 @@ through. Three flex columns:
 - **Right cluster** (`.agent-header-pills`): flyout pills + overflow.
   - **Inbox pill** (`📬 inbox · N`): hidden when empty; click opens
     the inbox flyout in the side panel.
-  - **Loose-ends pill** (`🪢 loose ends · N`): hidden when empty;
-    click opens the loose-ends flyout.
-  - **Tasks pill** (`⚙ tasks · N`): hidden when empty; click opens the
-    running-bash-tasks flyout (`GET /api/bash-tasks` — the in-flight
-    Pending/Running tasks from the in-container `bash-tasks/` dir). Unlike
-    loose-ends (refreshed on turn_end), tasks start + finish asynchronously
-    between turns and `/api/state` isn't polled while online, so the pill
-    polls the endpoint on a light interval (≈4s). Snapshot only (no SSE push
-    yet).
+  - **Todos pill** (`📋 todos · N`): hidden when empty; click opens
+    the todos flyout — see the todos-flyout paragraph below
+    (`GET /api/todos`, refreshed on cold load + every `turn_end`).
   - **Overflow button** (`⋯`): always visible. Opens a frosted popover
     (`#overflow-menu`, positioned outside the header to escape any
     stacking context) with four management rows followed by a model
@@ -176,39 +170,17 @@ Older per-agent flyouts this doc used to describe (a "loose-ends"
 list of questions/approvals/reminders backed by a since-removed
 `GET /api/loose-ends`, and a read-only "tasks" list of in-flight bash
 tasks backed by a since-removed `GET /api/bash-tasks`) no longer
-exist — todos superseded both. One open gap from that migration:
-the "Ask → operator inline-answer binding" described below relies on
-that removed `/api/loose-ends` endpoint and is currently non-functional
-(hyperhive#2922) — the operator can still answer a pending question via
-the main dashboard's own question surfacing, just not inline in this
-agent's terminal.
-
-**Ask → operator inline-answer binding** (currently non-functional,
-see the todos-flyout paragraph above + hyperhive#2922 — described here
-for the intended design, which is what a fix would restore). When the
-agent emits `mcp__hyperhive__ask(to: "operator", ...)`, the tool_use
-renderer mounts an empty slot (`<div class="ask-answer-inline-slot">`)
-right under the `↳ ask → operator` row in the terminal scrollback
-and pushes a reference into `pendingAskBinds`. The broker assigns
-the question id asynchronously, so the slot waits — and the next
-`/api/loose-ends` refresh runs `reconcileAskBinds()`, which walks
-the slot list and pairs each unbound slot with the first unclaimed
-pending operator-bound question whose `question` text matches the
-slot's stashed `_askQuestion`. On match the slot mounts the
-`buildAnswerForm` (same form shape as the loose-ends flyout —
-POSTs to the core's `POST /api/answer-question/{id}` cross-origin). Slots
-stay in the array after binding so the reconciler can flip them
-to a neutral `[resolved]` tag when the question later disappears
-from the pending list. Disappearance can mean answered, cancelled
-by the asker, or TTL-expired — the neutral label avoids
-mis-asserting "✓" on the cancel / expire paths; full resolution
-state is visible via the side-panel history. A defensive prune
-walks the slot list each tick and drops any whose DOM node has
-been removed (e.g. via a future "clear single row" affordance),
-so stale references don't accumulate. Slots whose question never
-arrives (e.g. the agent cancelled the ask, or the question is
-older than the loose-ends retention window) stay empty — the
-operator can still answer via the side panel, no regression.
+exist — todos superseded both. A third casualty of that migration —
+an "ask → operator" inline-answer form that used to mount under an
+`mcp__hyperhive__ask(to: "operator", ...)` row in the terminal
+scrollback — depended on the same removed `/api/loose-ends` endpoint
+and was found dead (hyperhive#2922: the binding never fired, so the
+slot never mounted a form). Per mara's call on that issue, it was
+removed rather than rebuilt — the main dashboard's own question
+surfacing (`dashboard/src/swarm.js` + `call.js`) is the one supported
+path for answering a pending question as the operator; this agent's
+own terminal just shows the `ask` tool call like any other tool call,
+with no inline answer affordance.
 
 ## Live view
 
@@ -302,8 +274,8 @@ Successful POSTs return 200 (no 303 redirects). Error responses
 use semantic status codes: **400** for missing/invalid input
 (`body` required, unknown model name, invalid effort level),
 **409** for retryable state conflicts (turn in flight when
-`/compact` is called, hive-c0re busy on `GET /api/loose-ends`),
-**500** only for genuine server/transport failures. The matching
+`/compact` is called), **500** only for genuine server/transport
+failures. The matching
 mutations fire `LiveEvent` variants on the per-agent bus, so the
 client doesn't refetch `/api/state` on submit — the SSE stream
 delivers the new state faster anyway. Only the login flow still
@@ -371,13 +343,10 @@ shaped).
   rate_limited, links }`. Only called when the container is running;
   skipped (muted badges) when stopped. Also accessible via the gateway
   at `/agent/<name>/api/dashboard-state`.
-- `GET /api/loose-ends` — loose-ends snapshot consumed by the inbox
-  flyout (`renderLooseEnds`). Returns pending questions the agent asked
-  or owes, plus pending reminders. Also calls `reconcileAskBinds()` to
-  wire inline answer forms to open `question_asked` events.
-- `GET /api/bash-tasks` — in-flight bash-task snapshot; returns only
-  `Pending` and `Running` tasks (completed/killed tasks are excluded).
-  Consumed by the running-bash-tasks flyout.
+- `GET /api/todos` — harness-local todos snapshot (loose-ends v2)
+  consumed by the todos flyout (`refreshTodos` / `buildTodosList`).
+  See the todos-flyout paragraph above for the producer/subsystem
+  model and the bulk mark-done row.
 - `GET /api/stats?window=24h|7d|30d|all` — time-bucketed turn analytics
   `Snapshot` consumed by the `/stats` page. `all` ranges from the
   earliest recorded turn with an adaptive bucket width.