fix(ios): weak-link SwiftUICore for iOS 26 build (SDK 56)

iOS phone archive failed at Ld: "cannot link directly with 'SwiftUICore' because product being built is not an allowed client of it" (a Liquid Glass / SwiftUI pod pulls SwiftUICore). Add a Podfile config plugin that weak-links SwiftUICore on the app target(s). iOS-only; tvOS unsigned already builds. [unsigned: GPG passphrase unavailable while user away; re-sign on merge]

plugins/withSwiftUICoreWeakLink.js

@@ -0,0 +1,55 @@
+const { withPodfile } = require("expo/config-plugins");
+
+// iOS 26 / Xcode 26: some pods (Liquid Glass / SwiftUI-based, e.g.
+// react-native-glass-effect-view, @expo/ui) pull in SwiftUICore, which cannot
+// be linked directly ("not an allowed client of it"). Weak-linking SwiftUICore
+// on the app target(s) satisfies the linker. iOS-only; tvOS is unaffected.
+const PATCH_START = "## >>> swiftuicore weak link";
+const PATCH_END = "## <<< swiftuicore weak link";
+
+function buildPatch() {
+  return [
+    PATCH_START,
+    "  installer.aggregate_targets.each do |aggregate_target|",
+    "    aggregate_target.user_project.native_targets.each do |target|",
+    "      target.build_configurations.each do |cfg|",
+    "        flags = cfg.build_settings['OTHER_LDFLAGS'] || '$(inherited)'",
+    "        flags = flags.join(' ') if flags.is_a?(Array)",
+    "        unless flags.include?('SwiftUICore')",
+    "          cfg.build_settings['OTHER_LDFLAGS'] = flags + ' -weak_framework SwiftUICore'",
+    "        end",
+    "      end",
+    "    end",
+    "    aggregate_target.user_project.save",
+    "  end",
+    PATCH_END,
+  ].join("\n");
+}
+
+module.exports = function withSwiftUICoreWeakLink(config) {
+  return withPodfile(config, (config) => {
+    let podfile = config.modResults.contents;
+
+    if (!/^\s*post_install\s+do\s+\|installer\|/m.test(podfile)) {
+      podfile += "\n\npost_install do |installer|\nend\n";
+    }
+
+    const patch = buildPatch();
+
+    if (podfile.includes(PATCH_START)) {
+      podfile = podfile.replace(
+        new RegExp(`${PATCH_START}[\\s\\S]*?${PATCH_END}`),
+        patch,
+      );
+    } else {
+      podfile = podfile.replace(
+        /^\s*post_install\s+do\s+\|installer\|.*$/m,
+        (match) => `${match}\n\n${patch}`,
+      );
+    }
+
+    console.log("✅  withSwiftUICoreWeakLink: Podfile updated");
+    config.modResults.contents = podfile;
+    return config;
+  });
+};