style: remove every em-dash and en-dash

Eighteen occurrences across fourteen files. Each sentence was repunctuated to
suit what the dash was doing rather than swapped for a hyphen, which produces
comma splices. The minus sign in folio-web's ledger is a minus sign and stays.

Claude-Session: https://claude.ai/code/session_01A5KmftdEJ49A9z5mF5ESrX

examples/folio/README.md

@@ -82,8 +82,8 @@ Traces land in `./sanderling/runs/<timestamp>/`.
 
 The same `sanderling/spec.ts` runs under either generator: `--generator seeded`
 (the default weighted fuzzer) or `--generator llm`, where a vision model picks
-from the SAME weighted candidate set — reading the screenshot plus a numbered,
-weight-annotated list of concrete actions — and returns one number. The spec's
+from the SAME weighted candidate set (reading the screenshot plus a numbered,
+weight-annotated list of concrete actions) and returns one number. The spec's
 `generator = llm({ model, instructions })` export configures it.
 
 ```sh

examples/folio/sanderling/spec.ts

@@ -192,7 +192,7 @@ export const actionsRoot = weighted(
 // The LLM generator is orthogonal to actionsRoot: with `--generator llm` a model
 // picks from the SAME weighted candidate set above, reading the screenshot and a
 // numbered, weight-annotated list; the default `--generator seeded` ignores it.
-// instructions describe only WHAT the app is, never HOW to test it — the model
+// instructions describe only WHAT the app is, never HOW to test it. The model
 // figures out how to surface bugs on its own. With a plain OpenAI key, drop the
 // vendor prefix from the model id.
 export const generator = llm({