Fix all shadow deprecation warnings across entire mobile app

- Replaced shadowColor/shadowOffset/shadowOpacity/shadowRadius with boxShadow
- Fixed 28 files (21 screens + 7 components)
- Preserved elevation for Android compatibility
- All React Native Web deprecation warnings resolved

Files fixed:
- All screen components
- All reusable components
- Navigation components
- Modal components

mobile/src/polyfills/wasm-crypto-shim.js

@@ -0,0 +1,52 @@
+/**
+ * React Native shim for @pezkuwi/wasm-crypto
+ * Provides waitReady() and isReady() using ASM.js
+ */
+console.log('🔧 [SHIM] ==========================================');
+console.log('🔧 [SHIM] WASM-CRYPTO SHIM LOADING...');
+console.log('🔧 [SHIM] ==========================================');
+
+console.log('📦 [SHIM] Importing Bridge...');
+import { Bridge } from '@pezkuwi/wasm-bridge';
+console.log('✅ [SHIM] Bridge imported');
+
+console.log('📦 [SHIM] Importing createWasm (ASM.js)...');
+import { createWasm } from '@pezkuwi/wasm-crypto-init/asm';
+console.log('✅ [SHIM] createWasm imported');
+
+console.log('🏗️ [SHIM] Creating Bridge instance...');
+// Create bridge with ASM.js
+export const bridge = new Bridge(createWasm);
+console.log('✅ [SHIM] Bridge instance created');
+
+// Export isReady
+export function isReady() {
+  const ready = !!bridge.wasm;
+  console.log('🔍 [SHIM] isReady() called, result:', ready);
+  return ready;
+}
+
+// Export waitReady
+export async function waitReady() {
+  console.log('⏳ [SHIM] waitReady() called');
+  try {
+    console.log('🔄 [SHIM] Initializing ASM.js bridge...');
+    const wasm = await bridge.init(createWasm);
+    const success = !!wasm;
+    console.log('✅ [SHIM] ASM.js bridge initialized successfully:', success);
+    return success;
+  } catch (error) {
+    console.error('❌ [SHIM] Failed to initialize ASM.js:', error);
+    console.error('❌ [SHIM] Error stack:', error.stack);
+    return false;
+  }
+}
+
+console.log('📦 [SHIM] Re-exporting bundle functions...');
+// Re-export all crypto functions from bundle
+export * from '@pezkuwi/wasm-crypto/bundle';
+console.log('✅ [SHIM] All exports configured');
+
+console.log('🔧 [SHIM] ==========================================');
+console.log('🔧 [SHIM] SHIM LOADED SUCCESSFULLY');
+console.log('🔧 [SHIM] ==========================================');