test(cli): stabilize acp --help snapshot against random home path length

yargs wraps the \`[string] [default: "..."]\` clause based on the
pre-normalized default value's character length, so a different random
tmpdir width produces a different leading-whitespace count on the
wrapped continuation line. After normalizing the path to \`<HOME>\` we
were left with a one-space drift between runs.

Collapse the wrap-dependent whitespace immediately before the clause
so the snapshot is byte-stable regardless of home path length.

Verified by deleting the .snap and regenerating across 3 runs.

packages/opencode/test/cli/help/__snapshots__/help-snapshots.test.ts.snap

@@ -18,8 +18,7 @@ Options:
       --mdns-domain  custom domain name for mDNS service (default: opencode.local)
                                                                 [string] [default: "opencode.local"]
       --cors         additional domains to allow for CORS                      [array] [default: []]
-      --cwd          working directory
-   [string] [default: "<HOME>"]"
+      --cwd          working directory [string] [default: "<HOME>"]"
 `;
 
 exports[`opencode CLI help-text snapshots every documented command emits stable help text: opencode mcp --help 1`] = `

packages/opencode/test/cli/help/help-snapshots.test.ts

@@ -27,10 +27,17 @@ import { cliIt } from "../../lib/cli-process"
 const TMP = os.tmpdir()
 const REAL_TMP = fs.realpathSync(TMP)
 function normalize(text: string): string {
-  return text
-    .replaceAll(REAL_TMP, "<TMPDIR>")
-    .replaceAll(TMP, "<TMPDIR>")
-    .replace(/<TMPDIR>\/oc-cli-[a-z0-9]+/g, "<HOME>")
+  return (
+    text
+      .replaceAll(REAL_TMP, "<TMPDIR>")
+      .replaceAll(TMP, "<TMPDIR>")
+      .replace(/<TMPDIR>\/oc-cli-[a-z0-9]+/g, "<HOME>")
+      // yargs wraps the `[string] [default: "..."]` clause based on the
+      // pre-normalized default's character length, so different random home
+      // path widths produce different leading-whitespace counts on the
+      // wrapped continuation. Collapse the wrap-dependent whitespace.
+      .replace(/\s+\[string\] \[default: "<HOME>"\]/g, ' [string] [default: "<HOME>"]')
+  )
 }
 
 // Top-level commands. Order matches what `opencode --help` prints today;