fix(compiler): preserve native boolean semantics in page branches

packages/compiler/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/compiler",
-  "version": "0.8.25",
+  "version": "0.8.26",
   "type": "module",
   "main": "src/index.ts",
   "exports": {

packages/compiler/src/codegen.ts

@@ -511,6 +511,19 @@ function renderLoopBody(node: ViewNode, locals: string[] = []): string {
         return escLit(` ${name}`);
       }
 
+      // Native boolean attributes inside #if/#each must use presence semantics,
+      // just like attributes on the page root. disabled="false" still disables
+      // an HTML input. Component props retain their serialized boolean value.
+      if (
+        !componentTag &&
+        !node.attrs.some((a) => a.name === "data-component") &&
+        isHtmlBooleanAttribute(name)
+      ) {
+        const expression = wholeAttributeExpression(attr.value);
+        if (expression) return "${(" + expression + ") ? " + JSON.stringify(` ${name}`) + ' : ""}';
+        if (attr.value === "false") return "";
+      }
+
       return escLit(` ${name}="`) + bakeLoopAttr(attr.value, componentTag) + escLit(`"`);
     })
     .join("");

packages/compiler/test/conditional-boolean-attributes.test.ts

@@ -0,0 +1,23 @@
+import { expect, test } from "bun:test";
+import { parse, generate } from "../src/index.ts";
+
+test("native boolean attributes inside conditional and loop bodies use presence semantics", async () => {
+  const source = `page Example {
+    load server account { return {} }
+    view {
+      {#if account.visible}<input required disabled="{!account.edit}" />{/if}
+      {#each account.rows as row}<input type="checkbox" checked="{row.checked}" disabled="false" />{/each}
+    }
+  }`;
+  const code = new Bun.Transpiler({ loader: "ts" }).transformSync(generate(parse(source)));
+  const mod = await import("data:text/javascript;base64," + Buffer.from(code).toString("base64"));
+  const html = await mod.default({
+    account: { visible: true, edit: true, rows: [{ checked: false }, { checked: true }] },
+  });
+  expect(html).not.toContain("disabled");
+  expect(html).not.toContain('checked="false"');
+  expect(html.match(/ checked/g)).toHaveLength(1);
+  expect(html).toContain("required");
+  const denied = await mod.default({ account: { visible: true, edit: false, rows: [] } });
+  expect(denied).toContain(" disabled");
+});