Merge loops/js into architecture: var hoisting + ASI + matchAll on top of regex engine / TDZ scaffolding

Combined arch's regex platform dispatch (runtime.sx) with loops/js's var-hoisting transpiler
(transpile.sx) and matchAll string method. Plan checkboxes updated to reflect both done.
Conflicts: lib/js/runtime.sx, lib/js/transpile.sx, lib/js/test.sh, plans/js-on-sx.md.

lib/js/test.sh

@@ -1486,6 +1486,24 @@ cat > "$TMPFILE" << 'EPOCHS'
 (eval "(get (RegExp \"hello\" \"gi\") \"global\")")
 (epoch 6032)
 (eval "(get (RegExp \"foo\" \"i\") \"ignoreCase\")")
+;; ── Phase 1.ASI: automatic semicolon insertion ─────────────────
+(epoch 4200)
+(eval "(js-eval \"function f() { return\n42\n} f()\")")
+(epoch 4201)
+(eval "(js-eval \"function g() { return 42 } g()\")")
+(epoch 4202)
+(eval "(let ((toks (js-tokenize \"a\nb\"))) (get (nth toks 1) :nl))")
+(epoch 4203)
+(eval "(let ((toks (js-tokenize \"a b\"))) (get (nth toks 1) :nl))")
+
+(epoch 4300)
+(eval "(js-eval \"var x = 5; x\")")
+(epoch 4301)
+(eval "(js-eval \"function f() { return x; var x = 42; } f()\")")
+(epoch 4302)
+(eval "(js-eval \"function f() { var y = 7; return y; } f()\")")
+(epoch 4303)
+(eval "(js-eval \"function f() { var z; z = 3; return z; } f()\")")
 
 EPOCHS
 
@@ -2280,6 +2298,16 @@ check 6025 "set delete→size 0"     '0'
 check 6030 "RegExp? result"        'true'
 check 6031 "RegExp global flag"    'true'
 check 6032 "RegExp ignoreCase"     'true'
+# ── Phase 1.ASI: automatic semicolon insertion ────────────────────
+check 4200 "return+newline → undefined"    '"js-undefined"'
+check 4201 "return+space+val → val"        '42'
+check 4202 "nl-before flag set after newline" 'true'
+check 4203 "nl-before flag false on same line" 'false'
+
+check 4300 "var decl program-level"         '5'
+check 4301 "var hoisted before use → undef" '"js-undefined"'
+check 4302 "var in function body"           '7'
+check 4303 "var then set in function"       '3'
 
 TOTAL=$((PASS + FAIL))
 if [ $FAIL -eq 0 ]; then