fix(newos4): refuse shell composition, wc takes multiple paths (v4.6.58)

Packet 1 and 3 (silent wrong answers from a shell-less terminal).

- detectComposition() in the security gate refuses ; && || | before dispatch.
  `;` used to fail loudly, but `&&`/`||` folded the right-hand side into the left
  command's argv (wc -l f && grep -c x f returned "42 42"), and a `|` arriving from
  the AI run_command tool bypassed splitPipe entirely and degraded the pattern to
  empty -- which matches every line. Operators inside quotes are untouched.
- wc accepts multiple paths: one line per file plus a total, per-file errors for
  missing paths. `wc -c a b` used to print only `a` and exit 0.
- help.html: "There is no shell" callout at the top of the command reference,
  plus the v4.6.57/58 changelog entry.

Verified live on v4.6.58 by replaying the exact call sequence used by both paths:
interactive `wc -c a b` -> "14 a / 10 b / 24 total"; `&&` and `;` refused;
`echo "a && b"` still echoes; AI run_command semantics with `|` and `&&` refused;
single command and multi-file wc still return real output.

0 files changed, 0 insertions, 0 deletions