graph: the MINIMAL home — the no-graph home, take two (release polish 2.2)

The chains-as-home experiment is retired (owner, 2026-10-06): dragging
the table out of its overlay home caused every mess we saw — checkboxes
by default, the bar/pill collision, the clearance band. The eventual
plan is the DATA VIEW as home; until that is designed and built, the
rendering-off home is deliberately minimal:

- The SAME composer blob home already floats — teach/practice switcher
  and pick pill untouched.
- The graph chrome's survivors in the graph view's OWN places: the
  top-right column — actions row (Chains + Import, the same 36px band
  pills) with the cost pill BELOW it. Import always renders (the
  entry-point law). No node search, no render gear (canvas things).
- A quiet centered summary (KnowledgeSummary, a pure body — pinned by
  the render suite): propositions · chains, teaching · practice session
  counts, the imported-sources list as truncated muted rows; the empty
  knowledge base says so and names the import entry point. Biased up
  off the composer (pb-40), pointer-events-none.
- NO recent sessions (the sidebar owns that, owner ruling).

The chain table returns to overlay-only duty: ChainTableBody's
onClose-optional and topBarExtra experiment hooks are reverted, and
components/chains-home.tsx is deleted. MinimalHome renders the STANDARD
ChainTableOverlay behind its Chains button — the pick flow mirrors
GraphView's contract verbatim (chainSelectOpen raises the overlay in
select mode; Done reports the lifted pick set down).

Smoke-verified live, twice: the summary shows real counts (262 props ·
160 chains, 195 teaching · 17 practice, 4 source paths); overlay
open/close via button + X; pick flow — cluster check → bar "23 nodes →
17 chains · Clear · Done" → uncheck 2 props → Done → chip "21
propositions selected"; practice session starts from the composer;
settings restore returns the canvas home. (First run's "select mode
missing" was a tester artifact: the bar is selection-gated and prop
checkboxes render only when expanded — both confirmed working.)

1417 tests (new KnowledgeSummary pins); tsc, lint, build green.

tests/render-chain-table.test.tsx

@@ -82,31 +82,12 @@ const BASE = {
 	onGenerate: () => {},
 	onDelete: () => {},
 	onClose: () => {},
-	topBarExtra: undefined as React.ReactNode,
 };
 
 function render(props: Partial<typeof BASE> = {}) {
 	return renderToStaticMarkup(React.createElement(ChainTableBody, { ...BASE, ...props }));
 }
 
-describe("ChainTableBody — the HOME variant (graph rendering off, 2026-10-06)", () => {
-	it("onClose ABSENT = the page, not the overlay: no close X, everything else intact", () => {
-		const html = render({ onClose: undefined });
-		assert.ok(!html.includes('data-testid="chain-table-close"'), "nothing to close — the table IS the page");
-		assert.ok(html.includes('data-testid="chain-table-search"'), "the search row stays");
-		assert.ok(html.includes("chain"), "the counts stay");
-		assert.ok(html.includes("lh-drag"), "the window-drag band stays (same bar as every surface)");
-	});
-
-	it("topBarExtra injects into the bar's right cluster — import + cost ride the TOP BAR (owner, 2026-10-06)", () => {
-		const html = render({ onClose: undefined, topBarExtra: React.createElement("b", { "data-testid": "tbx" }, "X") });
-		assert.ok(html.includes('data-testid="tbx"'), "the extra renders inside the bar");
-		assert.ok(html.includes("lh-no-drag"), "the cluster carves out of the drag band");
-		const overlay = render();
-		assert.ok(!overlay.includes('data-testid="tbx"'), "absent by default — the overlay variant injects nothing");
-	});
-});
-
 describe("ChainTableBody — clusters (the outermost layer)", () => {
 	it("collapsed by default: cluster rows render, chain rows do not", () => {
 		const html = render();