chore: sweep em dashes from our own source and README (#13)

src/lib/markdown.ts

@@ -15,8 +15,8 @@ import type { ChatTurn, ThreadMessage } from "./types";
  * and a `**Lam**` header on each exchange gave both speakers the same visual
  * weight and made the reader scan past chrome to reach the answer.
  *
- * Raycast solves the same problem with alignment — right-aligned bubbles for
- * the user — but markdown offers no alignment control, so styling is the only
+ * Raycast solves the same problem by aligning messages: right-aligned bubbles
+ * for the user. Markdown offers no alignment control, so styling is the only
  * lever available.
  */
 
@@ -66,7 +66,7 @@ function renderMessage(message: ThreadMessage, options: TranscriptOptions): stri
 
   // The one thing allowed to break the plain-text rule, because it means
   // something went wrong and should not be skimmed past.
-  if (message.error) sections.push("", `**Error** — ${message.error}`);
+  if (message.error) sections.push("", `**Error:** ${message.error}`);
 
   if (options.showToolCalls && message.toolCalls.length > 0) {
     sections.push("", renderTools(message));
@@ -129,8 +129,8 @@ export function buildThreadMarkdown(
  * Unlike the transcript this reads oldest-first: as a standalone document, a
  * conversation is easier to read in the order it happened.
  *
- * This needs labels because the transcript's styling — blockquotes and dimmed
- * text — is gone by the time it reaches a clipboard.
+ * This needs labels because the transcript's styling (blockquotes and dimmed
+ * text) is gone by the time it reaches a clipboard.
  */
 export function sessionToPlainText(turns: ChatTurn[]): string {
   if (turns.length === 0) return "";