test: the third edit of improvise-0x9u's repair, and two evidence corrections

`close` restores the DRAWN cell text rather than the seed, and reverting that
one line left the whole suite green while `18400` sat where `18,400` had been
on the shipped demo. Asserted after the second click, proved by that revert.

improvise-o31u's desktop arm cannot fail for the reason its evidence gave:
both named mechanisms were measured and neither moves it (`#cast-pivot` is
966px at 1280, so an 880px floor is inert wherever it is placed). The entry
now says it is forward-looking, and credits the phone arm with the fault it
actually catches.

Plus three one-liners: UNCALLED's source-scan blindness, the gzip -9 proxy in
the improvise-cl7y table, and why `view-back` is not one of its five siblings.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH

web/tests/bundle/wasm_surface.test.js

@@ -89,6 +89,8 @@ test("the page still reaches the client through a handful of calls", () => {
 /// Methods on `Client` the page does not call, each with the reason it is
 /// still exported. A door with no caller and no entry here is improvise-seik:
 /// the dangerous kind, because calling the wrong one of a pair is silent.
+// What this CANNOT see, exactly as UNPAINTED cannot: `callsOn` is a source
+// scan, so a `client.foo()` inside a function nothing calls reads as called.
 const UNCALLED = {
   free: "wasm-bindgen's own destructor, not ours to remove",
   initSync: "wasm-bindgen's own module loader, beside the default export",