fix(expo): address review feedback on theming PR

- Export validation internals via _testing so tests import the real
  implementation instead of a stale copy.
- Add comment documenting that theme loading is centralized in
  ClerkExpoModule (other init paths guard with !isInitialized).

Author: chriscanin

packages/expo/android/src/main/java/expo/modules/clerk/ClerkExpoModule.kt

@@ -85,6 +85,10 @@ class ClerkExpoModule(reactContext: ReactApplicationContext) :
                     }
 
                     Clerk.initialize(reactApplicationContext, pubKey)
+                    // Theme loading is centralized here. ClerkViewFactory.configure()
+                    // and ClerkUserProfileActivity.onCreate() only call Clerk.initialize()
+                    // when Clerk is not yet initialized, so by the time they run
+                    // ClerkExpoModule has already set the custom theme.
                     // Must be set AFTER Clerk.initialize() because initialize()
                     // resets customTheme to its `theme` parameter (default null).
                     loadThemeFromAssets()

packages/expo/app.plugin.js

@@ -716,3 +716,4 @@ const withClerkExpo = (config, props = {}) => {
 };
 
 module.exports = withClerkExpo;
+module.exports._testing = { validateThemeJson, isPlainObject, VALID_COLOR_KEYS, HEX_COLOR_REGEX };

packages/expo/src/__tests__/appPlugin.theme.test.js

@@ -1,71 +1,6 @@
 import { beforeEach, describe, expect, test, vi } from 'vitest';
 
-// The plugin is plain CJS — load the validation function by evaluating
-// just the relevant pieces.  We re-declare the constants and function
-// exactly as they appear in app.plugin.js so the test stays in sync.
-// ------------------------------------------------------------------
-
-const VALID_COLOR_KEYS = [
-  'primary',
-  'background',
-  'input',
-  'danger',
-  'success',
-  'warning',
-  'foreground',
-  'mutedForeground',
-  'primaryForeground',
-  'inputForeground',
-  'neutral',
-  'border',
-  'ring',
-  'muted',
-  'shadow',
-];
-
-const HEX_COLOR_REGEX = /^#([0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$/;
-
-function isPlainObject(value) {
-  return typeof value === 'object' && value !== null && !Array.isArray(value);
-}
-
-function validateThemeJson(theme) {
-  if (!isPlainObject(theme)) {
-    throw new Error('Clerk theme: theme JSON must be a plain object');
-  }
-
-  const validateColors = (colors, label) => {
-    if (!isPlainObject(colors)) {
-      throw new Error(`Clerk theme: ${label} must be an object`);
-    }
-    for (const [key, value] of Object.entries(colors)) {
-      if (!VALID_COLOR_KEYS.includes(key)) {
-        console.warn(`⚠️  Clerk theme: unknown color key "${key}" in ${label}, ignoring`);
-        continue;
-      }
-      if (typeof value !== 'string' || !HEX_COLOR_REGEX.test(value)) {
-        throw new Error(`Clerk theme: invalid hex color for ${label}.${key}: "${value}"`);
-      }
-    }
-  };
-
-  if (theme.colors != null) validateColors(theme.colors, 'colors');
-  if (theme.darkColors != null) validateColors(theme.darkColors, 'darkColors');
-
-  if (theme.design != null) {
-    if (!isPlainObject(theme.design)) {
-      throw new Error(`Clerk theme: design must be an object`);
-    }
-    if (theme.design.fontFamily != null && typeof theme.design.fontFamily !== 'string') {
-      throw new Error(`Clerk theme: design.fontFamily must be a string`);
-    }
-    if (theme.design.borderRadius != null && typeof theme.design.borderRadius !== 'number') {
-      throw new Error(`Clerk theme: design.borderRadius must be a number`);
-    }
-  }
-}
-
-// ------------------------------------------------------------------
+const { validateThemeJson } = require('../../app.plugin.js')._testing;
 
 describe('validateThemeJson', () => {
   beforeEach(() => {