pyvm: split op handlers into ops_core/ops_box/ops_ctrl; add ops_flow + intrinsic; delegate vm.py without behavior change

net-plugin: modularize constants (consts.rs) and sockets (sockets.rs); remove legacy commented socket code; fix unused imports
mir: move instruction unit tests to tests/mir_instruction_unit.rs (file lean-up); no semantic changes
runner/pyvm: ensure using pre-strip; misc docs updates

Build: cargo build ok; legacy cfg warnings remain as before

apps/tests/macro/exception/expr_postfix_direct.nyash

@@ -0,0 +1,12 @@
+function f(x) {
+  return x
+}
+
+function main(args) {
+  local i = 0
+  loop(i < 2) {
+    f(i) catch(e) { print(e) } cleanup { print("cleanup") }
+    i = i + 1
+  }
+}
+

apps/tests/macro/exception/loop_if_join_postfix.nyash

@@ -0,0 +1,16 @@
+function f(x) {
+  return x
+}
+
+function main(args) {
+  local i = 0
+  local a = 0
+  loop(i < 2) {
+    // both branches assign to the same variable -> JoinResult(a)
+    if i % 2 == 0 { a = 1 } else { a = 2 }
+    // include postfix sugar to exercise TryCatch normalization in the same scope
+    with_cleanup(postfix_catch(f(i), "Error", fn(e){ print(e) }), fn(){ })
+    i = i + 1
+  }
+}
+

apps/tests/macro/exception/loop_postfix_sugar.nyash

@@ -0,0 +1,15 @@
+function f(x) {
+  return x
+}
+
+function main(args) {
+  local i = 0
+  loop(i < 2) {
+    with_cleanup(
+      postfix_catch(f(i), "Error", fn(e){ print(e) }),
+      fn(){ print("cleanup") }
+    )
+    i = i + 1
+  }
+}
+

apps/tests/macro/exception/postfix_catch.nyash

@@ -0,0 +1,9 @@
+// Phase 1 sugar: postfix_catch(expr, "Error", fn(e){ body })
+function do_work(args) {
+  return 0
+}
+
+function main(args) {
+  postfix_catch(do_work(args), "Error", fn(e){ print(e) })
+}
+

apps/tests/macro/exception/postfix_catch_method.nyash

@@ -0,0 +1,12 @@
+// Phase 1 sugar: method call wrapped by postfix_catch
+box Worker {
+  run() {
+    return 0
+  }
+}
+
+function main(args) {
+  local w = new Worker()
+  postfix_catch(w.run(), "Error", fn(e){ print(e) })
+}
+

apps/tests/macro/exception/with_cleanup.nyash

@@ -0,0 +1,9 @@
+// Phase 1 sugar: with_cleanup(expr, fn(){ body })
+function cleanup_target(args) {
+  return 1
+}
+
+function main(args) {
+  with_cleanup(cleanup_target(args), fn(){ print("done") })
+}
+

apps/tests/macro/if/assign_join_basic.nyash

@@ -0,0 +1,5 @@
+function main(args) {
+  local a = 0
+  if 1 { a = 1 } else { a = 2 }
+}
+

apps/tests/macro/if/assign_three_vars.nyash

@@ -0,0 +1,17 @@
+function main(args) {
+  local a, b, c
+  local d = 1
+  if d == 1 {
+    a = 1
+    b = 2
+    c = 3
+  } else {
+    a = 10
+    b = 20
+    c = 30
+  }
+  print(a)
+  print(b)
+  print(c)
+}
+

apps/tests/macro/if/assign_two_vars.nyash

@@ -0,0 +1,15 @@
+function main(args) {
+  local x, y
+  local c = 1
+  if c == 1 {
+    x = 10
+    y = 20
+  } else {
+    x = 30
+    y = 40
+  }
+  // ensure use
+  print(x)
+  print(y)
+}
+

apps/tests/macro/if/then_only.nyash

@@ -0,0 +1,8 @@
+function main(args) {
+  local x = 0
+  if 1 {
+    x = 42
+    print(x)
+  }
+}
+

apps/tests/macro/if/with_else.nyash

@@ -0,0 +1,11 @@
+function main(args) {
+  local x
+  local c = 0
+  if c == 1 {
+    x = 10
+  } else {
+    x = 20
+  }
+  print(x)
+}
+

apps/tests/macro/loopform/for_step2.nyash

@@ -0,0 +1,4 @@
+for(fn(){ local i = 0 }, i <= 4, fn(){ i = i + 2 }, fn(){
+  print(i)
+})
+

apps/tests/macro/loopform/foreach_empty.nyash

@@ -0,0 +1,5 @@
+local arr = []
+foreach(arr, "x", fn() {
+  print(x)
+})
+

apps/tests/macro/loopform/nested_block_break.nyash

@@ -0,0 +1,9 @@
+// Nested bare block containing break; should terminate loop when i==3
+local i = 0
+loop (i < 10) {
+  { if i == 3 { break } }
+  print(i)
+  i = i + 1
+}
+return 0
+

apps/tests/macro/loopform/nested_if_break.nyash

@@ -0,0 +1,11 @@
+local i = 0
+loop(1) {
+  if (i < 10) {
+    if (i == 3) {
+      break
+    }
+  }
+  print(i)
+  i = i + 1
+}
+

apps/tests/macro/loopform/nested_if_continue.nyash

@@ -0,0 +1,14 @@
+local i = 0
+loop(i < 6) {
+  if (i % 2 == 0) {
+    if (i == 4) {
+      i = i + 1
+      continue
+    }
+    i = i + 1
+    continue
+  }
+  print(i)
+  i = i + 1
+}
+

apps/tests/macro/strings/env_tag_demo.nyash

@@ -0,0 +1,2 @@
+print("hello")
+

apps/tests/macro/strings/index_of_demo.nyash

@@ -0,0 +1,4 @@
+local s = "hello world"
+local i = s.indexOf("world")
+print(i)
+