hs: query targets, prolog hook, loop scripts, new plans, WASM regen

Hyperscript compiler/runtime:
- query target support in set/fire/put commands
- hs-set-prolog-hook! / hs-prolog-hook / hs-prolog in runtime
- runtime log-capture cleanup

Scripts: sx-loops-up/down, sx-hs-e-up/down, sx-primitives-down
Plans: datalog, elixir, elm, go, koka, minikanren, ocaml, hs-bucket-f,
       designs (breakpoint, null-safety, step-limit, tell, cookies, eval,
       plugin-system)
lib/prolog/hs-bridge.sx: initial hook-based bridge draft
lib/common-lisp/tests/runtime.sx: CL runtime tests

WASM: regenerate sx_browser.bc.js from updated hs sources

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/sx-hs-e-down.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Stop the sx-hs-e tmux session. Optionally (--clean) remove worktrees.
+set -euo pipefail
+
+SESSION="sx-hs-e"
+WORKTREE_BASE="/root/rose-ash-e"
+CLEAN=0
+
+for arg in "$@"; do
+  case "$arg" in
+    --clean) CLEAN=1 ;;
+    *) echo "Unknown arg: $arg"; exit 2 ;;
+  esac
+done
+
+if tmux has-session -t "$SESSION" 2>/dev/null; then
+  WINDOWS=$(tmux list-windows -t "$SESSION" -F '#W')
+  for w in $WINDOWS; do
+    tmux send-keys -t "$SESSION:$w" "/exit" C-m 2>/dev/null || true
+  done
+  echo "Sent /exit to all windows. Waiting 5s..."
+  sleep 5
+  tmux kill-session -t "$SESSION"
+  echo "Killed tmux session '$SESSION'."
+else
+  echo "No $SESSION tmux session running."
+fi
+
+if [ "$CLEAN" = "1" ]; then
+  cd "$(dirname "$0")/.."
+  for item in e36 e37 e38 e39 e40; do
+    wt="$WORKTREE_BASE/$item"
+    if [ -d "$wt" ]; then
+      git worktree remove --force "$wt" 2>/dev/null || rm -rf "$wt"
+      echo "Removed worktree: $wt"
+    fi
+  done
+  git worktree prune
+  echo "Branches preserved. Remove manually if desired:"
+  echo "  git branch -D hs-e36-websocket hs-e37-tokenizer hs-e38-sourceinfo hs-e39-webworker hs-e40-fetch"
+fi