Wave 7 close-out: the graphTools surface, wrapped cluster labels, the orphan sweep

Part 1 — the surface:
- Settings ▸ Agent ▸ Tools gains the prober GRAPH-TOOLS row as its FIRST
  row (owner ruling: in the Tools section, not the tool-toggles list —
  its subject is the map, its mechanism is agent capability). Writes
  agent.graphTools {enabled} (absent = on, the toggle discipline) via
  the section PUT; composeGraphTools pure seam. Its own key in the agent
  contract — never in the tools map.
- The row carries the search-row hint discipline: "Connects prior
  sessions' knowledge into new ones — the prober reads the knowledge
  map" (owner wording). The honest interplay composes both: when
  graph.enabled is off the row dims + disables with a "Graph is
  disabled" hint (the effective gate itself is server-side, per-turn
  fresh). AgentSection reads the graph section (record.graph, passed by
  the dialog) — read-only.
- Cluster labels wrap: wave 7 made labels session names and FILE PATHS,
  which the old single-line fillText could not bound. wrapRegionLabel
  (pure, exported): word-wrap first, char-split long paths (the
  node-label discipline), capped at 3 lines, overflow folded into an
  ellipsized last line (owner: wrap, cap 2–3, ellipsize). Pre-wrapped
  once per geometry build at the SCREEN-fixed size (viewer-relative
  labels — the wrap never goes stale mid-camera-move), drawn centered
  line-by-line at the centroid. Deleted-session clusters keep their
  hull-only honest silence (label null → no lines).
- The orphan sweep: StatsBar's leftSlot prop is dead (its one consumer,
  the knowledge-context slider, died in c690181) — removed, and pre-chat
  views now render NOTHING on the left (owner ruling this round: a
  "— · —" summary over an empty popover is pure noise) — the dictation
  middle just widens. Stale knowledge-context comments swept in
  chat.tsx (adoption-window + activity-nudge docs), activity-dock.tsx
  (useActivity ground rules), dictation.tsx (×2 adaptive-meter docs),
  home.tsx (pre-chat dock comment).

Part 2 — Teacher's c690181 review: clean. Imports, KIND_ICON/KIND_LABEL
entries, render branches and event seams all excised whole; the probe-
handoff branch re-indented intact and merge-adopted; tests updated in
lockstep (merge-adopted, record-adapter, render-new-session retired).
Platform's 4b60e0f roster-string fixes (labeler dropped from both
SLOT_META blocks) reviewed — consistent across agent-section +
setup-dialog.

Gates: tsc clean, 854/854 (8 new: wrapRegionLabel cases, graphTools
SSR rows ×3; stats-bar + ladder fixtures updated to the new rulings),
lint 0, build ok. Live on :3001: graphTools row first-in-group with
hint, off→{enabled:false}→on round-trip, graph-off dimming + hint +
disabled toggle, pre-chat rows summary-free, chat view keeps its
summary, long-title cluster label wrapped without console errors
(visual read unavailable this session — pure wrap is unit-pinned).

components/settings/agent-section.tsx

@@ -49,6 +49,7 @@ import type React from "react";
 import {
 	MODEL_SLOTS,
 	type AgentSettings,
+	type GraphSettings,
 	type ModelCatalogEntry,
 	type ModelSlotName,
 	type ModelsSettings,
@@ -99,6 +100,14 @@ export function composeTool(agent: AgentSettings | undefined, id: string, on: bo
 	return { ...agent, tools: { ...agent?.tools, [id]: on } };
 }
 
+/** Compose the prober graph-tools toggle (wave 7): its own key in the
+ *  agent section — never in the tool-toggles map (owner ruling). Absent =
+ *  ON (the toggle discipline); the write is explicit either way, so an
+ *  explicit-off record stays visible as stored. Pure — exported for tests. */
+export function composeGraphTools(agent: AgentSettings | undefined, on: boolean): AgentSettings {
+	return { ...agent, graphTools: { enabled: on } };
+}
+
 /** The research tool runs on the search port — the teacher registry DROPS
  *  it when no engine is live (chat-handler's searchAvailable, the same
  *  /api/search signal the section fetches). Pure — exported for tests.
@@ -218,12 +227,17 @@ function MenuTrigger({
 export function AgentSection({
 	agent,
 	models,
+	graph,
 	onSectionChange,
 	onModelsChange,
 }: {
 	agent: AgentSettings | undefined;
 	/** The `models` section (slot pins — engine-level, PUT /api/settings/models). */
 	models: ModelsSettings | undefined;
+	/** The `graph` section — READ ONLY here: the graphTools row composes its
+	 *  master switch (graph.enabled off dims + disables the row; the
+	 *  effective gate is server-side, per-turn fresh). */
+	graph: GraphSettings | undefined;
 	/** Writes the composed WHOLE agent section (replace-PUT discipline). */
 	onSectionChange: (next: AgentSettings) => void;
 	/** Writes the composed models section (slots — replace-PUT discipline). */
@@ -571,6 +585,31 @@ export function AgentSection({
 			</SettingsGroup>
 
 			<SettingsGroup label="Tools" testid="group-tools">
+				{/* The prober's graph tools (wave 7, owner ruling 2026-09-23):
+				    FIRST row of the group — its subject is the map, its
+				    mechanism is agent capability, so it lives in Tools but
+				    NOT in the tool-toggles list. Its own agent-section key
+				    (agent.graphTools), the search-row hint discipline: a
+				    smaller line under it explaining what it is — this
+				    connects prior sessions' knowledge into new ones. */}
+				{(() => {
+					const graphOn = graph?.enabled ?? true;
+					return (
+						<SettingsRow
+							label="Graph tools"
+							hint={graphOn ? "Connects prior sessions' knowledge into new ones — the prober reads the knowledge map" : "Graph is disabled"}
+							testid="graph-tools-row"
+							dimmed={!graphOn}
+						>
+							<Toggle
+								checked={agent?.graphTools?.enabled ?? true}
+								disabled={!graphOn}
+								label="graph tools"
+								onChange={(on) => onSectionChange(composeGraphTools(agent, on))}
+							/>
+						</SettingsRow>
+					);
+				})()}
 				{TOGGLE_TOOLS.map((id) => {
 					// Research needs a live search engine; the row + toggle gray
 					// on the same signal the registry drops the tool on (see