feat(config): add shared browser cookie policy

packages/cli/src/build.ts

@@ -44,6 +44,7 @@ import {
   bundleCss,
   renderStyles,
   resolveThemeConfig,
+  resolveBrowserCookieOptions,
   renderActiveThemeCss,
   renderThemeCss,
   renderThemeRuntime,
@@ -493,7 +494,7 @@ export async function runBuild(appRoot: string): Promise<void> {
   console.log(`✓ Controllers: ${controllersPath}`);
 
   // 1a) Theme tokens + client switcher (always emitted; built-in light/dark).
-  const theme = resolveThemeConfig(config.theme);
+  const theme = resolveThemeConfig(config.theme, config.cookies);
   const themeCss = renderThemeCss(theme);
   const themeJs = renderThemeRuntime(theme);
   writeFileSync(join(distDir, "theme.css"), themeCss, "utf8");
@@ -541,8 +542,17 @@ export async function runBuild(appRoot: string): Promise<void> {
 
   // 1a4) i18n: bake locale messages into the manifest (opt-in via app/locales).
   const localeMessages = loadLocales(join(appDir, "locales"));
+  const i18nConfig = config.i18n
+    ? {
+        ...config.i18n,
+        cookie: {
+          ...resolveBrowserCookieOptions(config.cookies, "language"),
+          ...(config.i18n.cookie ?? {}),
+        },
+      }
+    : undefined;
   const i18n = Object.keys(localeMessages).length
-    ? resolveI18n(localeMessages, config.i18n)
+    ? resolveI18n(localeMessages, i18nConfig)
     : undefined;
   if (i18n) console.log(`✓ i18n:    ${i18n.langs.length} locales (default: ${i18n.default})`);