test v1.43.2: smokes that can fail, in CI, and an honest TESTING.md

T1: demo/serve.mjs exports check/checkAll/finish — all 48 smokes now
assert named facts and exit non-zero on a mismatch or an uncaught
in-card exception (verified by breaking the kiosk guard on purpose).
Informational values were frozen from a v1.43.1 run and cross-read
against the source; timings assert budgets, not exact numbers.

T2: new CI job 'smoke' gated on 'frontend', builds a FRESH bundle
before running (the committed demo/srv/assets copy is a snapshot) and
uploads per-file logs on failure.

T3: [auto] now means 'a named failing check exists' and each line names
it (43 lines); 72 aspirational markers honestly downgraded to [manual].
Fixed the 'ZERO edit buttons' contradiction (wrong since v1.30.1) and
the opening-click line (true again since v1.43.1).

Three smokes carried pre-v1.39.0/v1.25 expectations and were testing
old behaviour: tap defaults for lights, card-wide tap action, label drag
requiring plan mode.

DEVELOPMENT.md documents the harness contract.

demo/smoke_split_nonsnap.mjs

@@ -1,5 +1,5 @@
 // Split now works on a non-grid-aligned room (imported/legacy polygons).
-import { launch } from './serve.mjs';
+import { launch, checkAll, finish } from './serve.mjs';
 const { page, browser } = await launch();
 const R = (nx, ny) => page.evaluate(([nx, ny]) => {
   const c = window.__card; const H = 1000 / c._curSpaceCfg.aspect; return [nx * 1000, ny * H];
@@ -17,5 +17,5 @@ await page.evaluate(()=>{const c=window.__card; c._roomDialog=false; c._pendingS
 await page.evaluate((p)=>window.__card._splitClick(p), await R(0.3,0.3));   // pick again
 await page.evaluate((p)=>window.__card._splitClick(p), await R(0.3,0.3));   // centre click = miss
 out.centreRefused = await page.evaluate(()=>window.__card._splitSel?.a == null);
-console.log(JSON.stringify(out));
-await browser.close();
+checkAll(out);
+await finish(browser, out);