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_room_link.mjs

@@ -1,4 +1,4 @@
-import { launch } from './serve.mjs';
+import { launch, checkAll, finish } from './serve.mjs';
 const { page, browser } = await launch();
 const res = await page.evaluate(async () => {
   const out = {};
@@ -34,5 +34,5 @@ const res = await page.evaluate(async () => {
   c._setMode('view'); await c.updateComplete;
   return out;
 });
-console.log(JSON.stringify(res, null, 1));
-await browser.close();
+checkAll(res);
+await finish(browser, res);