graph: the rendering switch — chains view as the home (release polish 2)

The settings Graph section splits into two switches (owner, 2026-10-06):

- EXTRACTION (was the lone "Graph" row): the DATA channel — pipeline,
  auditor, prober graph tools. Key unchanged (graph.enabled), label now
  names its job; off = the graph stops growing, nothing is deleted.
- GRAPH RENDERING (new, graph.rendering, default on): display-only.
  Off = the home's main view is the CHAINS VIEW instead of the canvas;
  data, reasoning-chain model, and the pipeline keep working untouched.

The chains home (components/chains-home.tsx): ChainTableBody in flow —
same body as the overlay, same powers (query + sort, selection, the
delete fence with its confirm dialog), but onClose is absent so the
top-bar X does not render (the table IS the page; ChainTableBody now
takes onClose optionally). The chrome survivors float top-right below
the top bar: Import notes (ALWAYS — the entry-point law) + the cost
pill (GraphCostControl, now exported). The composer blob persists over
everything; the table scrolls CLEAR of it via a fixed pb-40 band (text
under a floating box is noise — unlike the canvas, which runs under).

Pick flow mirrors the overlay contract exactly (home lifts the pick
set; selectMode swaps the bar's confirm to Done). The chip relabels to
"Pick propositions" (no "from the map" — there is no map); while
picking, the chip row hides so the floating bar above the composer is
the one voice. Settings resolve rendering through the one core
resolver + renderingEnabled(); read server-side per navigation, so the
switch applies on the next visit home.

Smoke-verified live (headless browser): chains home renders without the
X, import + search + composer clearance confirmed, pick flow checked 2
propositions -> Done -> chip count -> practice session started with the
graph context carried (2 props, 2 chains), settings restored.

Known follow-ups (flagged, not built): after Done the bar morphs to the
table's Clear/Delete management bar while the chip also shows the count
(two voices, same set — the table's own editor law); /chat/new's pick
chip still says "from the map".

Tests: rendering in factory/sanitize/parse/resolve pins, the GraphSection
render pins (Extraction label + rendering row), the home-variant
chain-table pin (no close X). 1414 pass; tsc, lint, build green.

tests/settings-resolution.test.ts

@@ -12,6 +12,7 @@ import { describe, it } from "node:test";
 import {
 	extractionEnabled,
 	graphToolsEnabled,
+	renderingEnabled,
 	resolveConversationSpec,
 	resolveModelSpec,
 	resolveRoleSpec,
@@ -43,7 +44,7 @@ describe("resolveSettings", () => {
 		assert.equal(eff.appearance.mdRendering.headingWeight, 900);
 		// wave 7 collapse: the master switch ONLY + the redesign's chunk
 		// budget — absent record resolves the factory 8192 (the 2026-09-30 bump)
-		assert.deepEqual(eff.graph, { enabled: true, extractionChunkTokens: 8192 });
+		assert.deepEqual(eff.graph, { enabled: true, rendering: true, extractionChunkTokens: 8192 });
 	});
 
 	it("explicit record values win over every factory default", () => {
@@ -76,10 +77,23 @@ describe("resolveSettings", () => {
 		assert.equal(eff.appearance.mdRendering.headingWeight, 600);
 		// wave 7 collapse: the section IS the master switch (absent budget
 		// field = factory 8192 — a pre-redesign record resolves cleanly).
-		assert.deepEqual(eff.graph, { enabled: false, extractionChunkTokens: 8192 });
+		assert.deepEqual(eff.graph, { enabled: false, rendering: true, extractionChunkTokens: 8192 });
+		// The DISPLAY split (owner, 2026-10-06): extraction off leaves the
+		// rendering switch ON — the data channel and the view are separate.
+		assert.equal(renderingEnabled(eff.graph), true);
 		// The chunk budget rides the same resolution: stored value wins.
 		const budgeted = resolveSettings({ version: 1, graph: { extractionChunkTokens: 2000 } });
-		assert.deepEqual(budgeted.graph, { enabled: true, extractionChunkTokens: 2000 });
+		assert.deepEqual(budgeted.graph, { enabled: true, rendering: true, extractionChunkTokens: 2000 });
+	});
+
+	it("graph rendering (2026-10-06): display-only — off resolves off, extraction untouched", () => {
+		const eff = resolveSettings({ version: 1, graph: { rendering: false } });
+		assert.equal(eff.graph.rendering, false, "stored off wins");
+		assert.equal(eff.graph.enabled, true, "the data channel is untouched");
+		assert.equal(renderingEnabled(eff.graph), false);
+		assert.equal(extractionEnabled(eff.graph), true);
+		// absent = factory ON (the home defaults to the canvas)
+		assert.equal(resolveSettings({ version: 1, graph: {} }).graph.rendering, true);
 	});
 
 	it("partial role override: thinkingLevel alone borrows the SLOT's model (or nothing, without one)", () => {