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/render-settings.test.tsx

@@ -174,19 +174,30 @@ describe("GraphSection — master switch + chunk budget (wave 7 + 2026-10-02)",
 	// only other control — it denominates the coverage ring and gates the
 	// auto-extraction trigger, resolved through the same core resolver the
 	// server uses (the 4096-fallback fix).
-	it("renders the master-switch row", () => {
+	it("renders the master-switch row — EXTRACTION since 2026-10-06 (the data channel, renamed when rendering split off)", () => {
 		const html = renderToStaticMarkup(<GraphSection graph={undefined} onSectionChange={() => {}} />);
 		assert.ok(html.includes('data-testid="graph-row-enabled"'));
+		assert.ok(html.includes(">Extraction<"), "the row names the DATA channel, not 'Graph'");
 		assert.ok(!html.includes("graph-row-embedding"), "the dead rungs render nothing");
 		assert.ok(!html.includes("Embedding model"), "the picker is gone");
 		assert.ok(!html.includes("graph-row-clustering"));
 		assert.ok(!html.includes("graph-row-labeling"));
-		assert.ok(tagOf(html, "toggle-graph-enabled").includes('aria-checked="true"'), "absent record = factory ON");
+		assert.ok(tagOf(html, "toggle-extraction-enabled").includes('aria-checked="true"'), "absent record = factory ON");
 	});
 
-	it("a stored off record shows the switch off", () => {
+	it("a stored off record shows the extraction switch off", () => {
 		const html = renderToStaticMarkup(<GraphSection graph={{ enabled: false }} onSectionChange={() => {}} />);
-		assert.ok(tagOf(html, "toggle-graph-enabled").includes('aria-checked="false"'));
+		assert.ok(tagOf(html, "toggle-extraction-enabled").includes('aria-checked="false"'));
+	});
+
+	it("the GRAPH RENDERING row (2026-10-06): display-only — absent record = factory ON, stored off shows off", () => {
+		const html = renderToStaticMarkup(<GraphSection graph={undefined} onSectionChange={() => {}} />);
+		assert.ok(html.includes('data-testid="graph-row-rendering"'));
+		assert.ok(html.includes(">Graph rendering<"));
+		assert.ok(tagOf(html, "toggle-graph-rendering-enabled").includes('aria-checked="true"'), "the home defaults to the canvas");
+		const off = renderToStaticMarkup(<GraphSection graph={{ rendering: false }} onSectionChange={() => {}} />);
+		assert.ok(tagOf(html, "toggle-extraction-enabled").includes('aria-checked="true"'), "rendering off does NOT touch extraction");
+		assert.ok(tagOf(off, "toggle-graph-rendering-enabled").includes('aria-checked="false"'));
 	});
 
 	it("the chunk-budget row: unset shows EMPTY with the factory placeholder + hint — one truth with the trigger", () => {