diff --git a/.env.example b/.env.example
index 32d71fb0..8afeccb6 100644
--- a/.env.example
+++ b/.env.example
@@ -146,12 +146,15 @@ RATE_LIMIT_MAX_REQUESTS=100
 RATE_LIMIT_MAX_REQUESTS_PER_WALLET=50
 
 # -----------------------------------------------------------------------------
-# Webhook Configuration
 # -----------------------------------------------------------------------------
+# Chainalysis Security API Configuration
+# -----------------------------------------------------------------------------
+# API key for Chainalysis address/transaction risk checks.
+# IMPORTANT: This is read server-side only. Never expose it to the browser.
+# CHAINALYSIS_API_KEY=your_chainalysis_api_key
 
-# Secret used to sign and verify revalidation webhook requests
-# This must be set in production to secure the /api/revalidate endpoint
-REVALIDATE_WEBHOOK_SECRET=your-webhook-secret
+# Chainalysis API base URL (optional, uses default if not set)
+# CHAINALYSIS_API_URL=https://api.chainalysis.com/api/v2
 
 # -----------------------------------------------------------------------------
 # Secret Management (Production)
diff --git a/src/components/PropertyCard.tsx b/src/components/PropertyCard.tsx
index d70c4534..80bfcd46 100644
--- a/src/components/PropertyCard.tsx
+++ b/src/components/PropertyCard.tsx
@@ -35,28 +35,24 @@ const PropertyCardInner: React.FC<PropertyCardProps> = ({
   const compareLimitReached = selectedIds.length >= 3 && !isCompared;
   const { addFavorite, removeFavorite, isFavorite } = useFavoritesStore();
 
-  const handleAddToCart = useCallback((e: React.MouseEvent) => {
-    e.preventDefault();
+  const handleAddToCart = (e: React.MouseEvent) => {
     e.stopPropagation();
     addItem(property, 1);
   }, [addItem, property]);
 
-  const handleComparisonToggle = useCallback((e: React.MouseEvent) => {
-    e.preventDefault();
+  const handleComparisonToggle = (e: React.MouseEvent) => {
     e.stopPropagation();
     toggleProperty(property);
   }, [toggleProperty, property]);
 
-  const handleCompareToggle = useCallback((e: React.MouseEvent<HTMLInputElement>) => {
-    e.preventDefault();
+  const handleCompareToggle = (e: React.MouseEvent<HTMLInputElement>) => {
     e.stopPropagation();
     if (!compareLimitReached) {
       togglePropertyId(property.id);
     }
   }, [compareLimitReached, togglePropertyId, property.id]);
 
-  const handleToggleFavorite = useCallback((e: React.MouseEvent) => {
-    e.preventDefault();
+  const handleToggleFavorite = (e: React.MouseEvent) => {
     e.stopPropagation();
     if (isFavorite(property.id)) {
       removeFavorite(property.id);
@@ -196,12 +192,12 @@ const PropertyCardInner: React.FC<PropertyCardProps> = ({
         </div>
 
         {/* Title */}
-        <h3
-          id={`property-${property.id}-name`}
+        <Link
+          href={`/properties/${property.id}`}
           className="text-base sm:text-lg font-bold text-gray-900 dark:text-white mb-1 sm:mb-2 hover:text-blue-600 dark:hover:text-blue-400 transition-colors line-clamp-2"
         >
           {property.name}
-        </h3>
+        </Link>
 
         {/* Location */}
         <div className="flex items-start gap-1 text-xs sm:text-sm text-gray-600 dark:text-gray-400 mb-2 sm:mb-3">
@@ -293,7 +289,7 @@ const PropertyCardInner: React.FC<PropertyCardProps> = ({
             </button>
             <Link
               href={`/properties/${property.id}`}
-              className="px-2 sm:px-4 py-1.5 sm:py-2 bg-blue-600 hover:bg-blue-700 text-white text-xs sm:text-sm font-medium rounded-lg transition-colors flex-shrink-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2 inline-flex items-center justify-center"
+              className="px-2 sm:px-4 py-1.5 sm:py-2 bg-blue-600 hover:bg-blue-700 text-white text-xs sm:text-sm font-medium rounded-lg transition-colors flex-shrink-0 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 inline-flex items-center justify-center"
               aria-label={`View details for ${property.name}`}
             >
               View
diff --git a/src/components/ui/chart.tsx b/src/components/ui/chart.tsx
index 39b2215f..6cacb6f2 100644
--- a/src/components/ui/chart.tsx
+++ b/src/components/ui/chart.tsx
@@ -77,6 +77,20 @@ function buildChartCSS(id: string, config: ChartConfig): string {
 
   if (!colorConfig.length) return ''
 
+  return Object.entries(THEMES)
+    .map(([theme, prefix]) => `
+${prefix} [data-chart=${id}] {
+${colorConfig
+  .map(([key, itemConfig]) => {
+    const color =
+      itemConfig.theme?.[theme as keyof typeof itemConfig.theme] ||
+      itemConfig.color
+    return color ? `  --color-${encodeURIComponent(key)}: ${color};` : null
+  })
+  .filter(Boolean)
+  .join("\n")}
+}
+`)
   const cssContent = Object.entries(THEMES)
     .map(([theme, prefix]) => {
       const rules = colorConfig
@@ -92,7 +106,16 @@ function buildChartCSS(id: string, config: ChartConfig): string {
     })
     .filter(Boolean)
     .join("\n")
+}
+
+const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
+  const css = React.useMemo(() => buildChartCSS(id, config), [id, config])
+
+  if (!css) return null
+
+  const sanitizedCss = DOMPurify.sanitize(css)
 
+  return <style dangerouslySetInnerHTML={{ __html: sanitizedCss }} />
   if (!cssContent) {
     return null
   }
diff --git a/src/lib/batchTransaction.ts b/src/lib/batchTransaction.ts
index bae5211d..58e5f360 100644
--- a/src/lib/batchTransaction.ts
+++ b/src/lib/batchTransaction.ts
@@ -1,6 +1,15 @@
 import type { CartItem } from '@/types/cart';
 import type { BatchTransactionResult } from '@/types/cart';
 import { logger } from '@/utils/logger';
+import { createPublicClient, http } from 'viem';
+import { mainnet } from 'viem/chains';
+
+const IS_DEMO_MODE = process.env.NEXT_PUBLIC_DEMO_TX === 'true';
+
+const publicClient = createPublicClient({
+  chain: mainnet,
+  transport: http(),
+});
 import { publicClient } from '@/lib/viem-client';
 
 const DEMO_MODE = process.env.NEXT_PUBLIC_DEMO_TX === 'true';
@@ -29,6 +38,29 @@ export class BatchTransactionService {
         };
       }
 
+      if (IS_DEMO_MODE) {
+        await new Promise(resolve => setTimeout(resolve, 2000));
+
+        const transactionHash = `0x${Array.from({length: 64}, () =>
+          Math.floor(Math.random() * 16).toString(16)).join('')}`;
+
+        const results = items.map(item => ({
+          propertyId: item.property.id,
+          success: Math.random() > 0.1,
+          transactionHash: Math.random() > 0.1 ? transactionHash : undefined,
+          error: Math.random() > 0.1 ? undefined : 'Transaction failed: Insufficient gas'
+        }));
+
+        const allSuccessful = results.every(result => result.success);
+        const totalGasUsed = items.length * 0.0025 + 0.005;
+
+        return {
+          success: allSuccessful,
+          transactionHash: allSuccessful ? transactionHash : undefined,
+          results,
+          totalGasUsed,
+          error: allSuccessful ? undefined : 'Some transactions failed'
+        };
       if (DEMO_MODE) {
         return this.executeDemoBatchPurchase(items);
       }
@@ -106,6 +138,38 @@ export class BatchTransactionService {
     blockNumber?: number;
     confirmations?: number;
   }> {
+    if (IS_DEMO_MODE) {
+      await new Promise(resolve => setTimeout(resolve, 1000));
+
+      const random = Math.random();
+      if (random < 0.7) {
+        return {
+          status: 'confirmed',
+          blockNumber: Math.floor(Math.random() * 1000000) + 18000000,
+          confirmations: Math.floor(Math.random() * 50) + 1
+        };
+      } else if (random < 0.9) {
+        return { status: 'pending' };
+      } else {
+        return { status: 'failed' };
+      }
+    }
+
+    try {
+      const receipt = await publicClient.waitForTransactionReceipt({
+        hash: transactionHash as `0x${string}`,
+        timeout: 30_000,
+      });
+
+      if (receipt.status === 'success') {
+        return {
+          status: 'confirmed',
+          blockNumber: Number(receipt.blockNumber),
+          confirmations: 1,
+        };
+      }
+
+      return { status: 'failed' };
     try {
       const receipt = await publicClient.getTransactionReceipt({
         hash: transactionHash as `0x${string}`,
diff --git a/src/utils/earlyErrorSuppression.ts b/src/utils/earlyErrorSuppression.ts
index a4a66ae5..2b2fe110 100644
--- a/src/utils/earlyErrorSuppression.ts
+++ b/src/utils/earlyErrorSuppression.ts
@@ -3,73 +3,93 @@ import { logger } from './logger';
 const stringifyArgs = (args: readonly unknown[]): string =>
   args.map((arg) => (typeof arg === 'string' ? arg : String(arg))).join(' ');
 
-// Patterns for known-noisy wallet extension errors that we silently swallow
-// instead of reporting to the structured logger. These come from third-party
-// Web3 extensions injecting scripts into the page and have no impact on
-// PropChain functionality.
-const SUPPRESS_PATTERNS: readonly string[] = [
-  'bfnaelmomeimhlpmgjnjophhpkkoljpa',
-  'evmAsk.js',
-  'selectExtension',
-  'chrome-extension://bfnaelmomeimhlpmgjnjophhpkkoljpa',
-];
+const earlySuppressionCleanups: Array<() => void> = [];
 
-const matchesSuppressionPattern = (...args: unknown[]): boolean => {
-  const message = stringifyArgs(args).toLowerCase();
-  return SUPPRESS_PATTERNS.some((pattern) => message.includes(pattern.toLowerCase()));
-};
-
-/**
- * Early error suppression for wallet extension noise.
- *
- * This module is imported as the very first side-effect in the app bootstrap,
- * so its global listeners are in place before React/wagmi/connectors emit
- * any errors.
- *
- * Design note: we deliberately do NOT monkey-patch the global console API
- * here. Overriding those methods would cause any logger sink that ultimately
- * writes through the global console to either recurse (infinite loop) or
- * silently lose the structured-logger pipeline. Instead we filter at the
- * boundary where vendor code reaches us — the global error and
- * unhandledrejection listeners — and route any non-suppressed event through
- * the structured logger so production telemetry receives correlation IDs,
- * redaction, and breadcrumbs via the existing pipeline.
- */
-export const initializeEarlyErrorSuppression = (): void => {
-  if (typeof window === 'undefined') return;
+// This file should be imported as early as possible in the application
+// It immediately starts suppressing extension errors
 
-  // Suppress global errors that match extension noise patterns; route
-  // everything else through the structured logger.
-  window.addEventListener(
-    'error',
-    (event) => {
-      if (matchesSuppressionPattern(event.error, event.filename, event.message)) {
-        event.preventDefault();
-        event.stopPropagation();
-        return;
-      }
-      logger.error('Unhandled error', {
-        message: event.message,
-        filename: event.filename,
-        lineno: event.lineno,
-        colno: event.colno,
-        error: event.error,
-      });
-    },
-    true,
-  );
+if (typeof window !== 'undefined') {
+  // Immediate error suppression before React loads
+  const originalConsoleError = console.error;
+  const originalConsoleWarn = console.warn;
+  
+  const suppressPatterns = [
+    'bfnaelmomeimhlpmgjnjophhpkkoljpa',
+    'evmAsk.js',
+    'selectExtension',
+    'chrome-extension://bfnaelmomeimhlpmgjnjophhpkkoljpa',
+  ];
+  
+  const shouldSuppress = (...args: unknown[]): boolean => {
+    const message = stringifyArgs(args).toLowerCase();
+    return suppressPatterns.some(pattern => message.includes(pattern.toLowerCase()));
+  };
+  
+  // Override console methods immediately
+  console.error = (...args: unknown[]) => {
+    if (shouldSuppress(...args)) return;
+    originalConsoleError.apply(console, args);
+  };
+  
+  console.warn = (...args: unknown[]) => {
+    if (shouldSuppress(...args)) return;
+    originalConsoleWarn.apply(console, args);
+  };
 
-  // Suppress unhandled promise rejections that match extension noise;
-  // route the rest through the structured logger.
-  window.addEventListener('unhandledrejection', (event) => {
-    if (matchesSuppressionPattern(event.reason)) {
+  earlySuppressionCleanups.push(() => {
+    console.error = originalConsoleError;
+    console.warn = originalConsoleWarn;
+  });
+  
+  // Suppress global errors
+  const handleError = (event: ErrorEvent) => {
+    if (shouldSuppress(event.error, event.filename, event.message)) {
+      event.preventDefault();
+      event.stopPropagation();
+    }
+  };
+  window.addEventListener('error', handleError, true);
+  earlySuppressionCleanups.push(() => {
+    window.removeEventListener('error', handleError, true);
+  });
+  
+  // Suppress unhandled promise rejections
+  const handleRejection = (event: PromiseRejectionEvent) => {
+    if (shouldSuppress(event.reason)) {
       event.preventDefault();
       event.stopPropagation();
       return;
     }
-    logger.error('Unhandled promise rejection', { reason: event.reason });
+  };
+  window.addEventListener('unhandledrejection', handleRejection);
+  earlySuppressionCleanups.push(() => {
+    window.removeEventListener('unhandledrejection', handleRejection);
+  });
+  
+  // Override window.onerror
+  const originalOnError = window.onerror;
+  window.onerror = (message, source, lineno, colno, error) => {
+    if (shouldSuppress(message, source, error)) {
+      return true; // Suppress the error
+    }
+    if (originalOnError) {
+      return originalOnError.call(window, message, source, lineno, colno, error);
+    }
+    return false;
+  };
+  earlySuppressionCleanups.push(() => {
+    window.onerror = originalOnError;
   });
+}
+
+export const initializeEarlyErrorSuppression = () => {
+  // This function can be called to ensure suppression is active
+  // Note: Early error suppression is already active from module load
 };
 
-// Auto-initialize on module import.
-initializeEarlyErrorSuppression();
+export const cleanupEarlyErrorSuppression = () => {
+  let fn: (() => void) | undefined;
+  while ((fn = earlySuppressionCleanups.pop()) !== undefined) {
+    fn();
+  }
+};
diff --git a/src/utils/extensionDetection.ts b/src/utils/extensionDetection.ts
index 5b56485d..95b851ae 100644
--- a/src/utils/extensionDetection.ts
+++ b/src/utils/extensionDetection.ts
@@ -82,29 +82,60 @@ export const sanitizeExtensionError = (error: unknown): string => {
   return 'Wallet extension error. Please check your extension settings and try again.';
 };
 
-/**
- * Install global listeners that filter noisy wallet extension errors.
- *
- * We deliberately do NOT monkey-patch the global console API here. Overriding
- * those methods would recurse any logger that ultimately writes through the
- * global console and would silently lose correlation IDs / redaction. Instead
- * we route filtered events through the structured logger so they remain
- * visible to telemetry as low-severity warnings.
- */
-export const setupExtensionErrorHandling = (): void => {
+const extensionErrorListeners: Array<() => void> = [];
+
+export const setupExtensionErrorHandling = () => {
   if (typeof window === 'undefined') return;
 
-  window.addEventListener('error', (event) => {
+  cleanupExtensionErrorHandling();
+  
+  // Override console.error to filter out extension errors
+  const originalConsoleError = console.error;
+  console.error = (...args: unknown[]) => {
+    const errorString = args.map(stringifyError).join(' ').toLowerCase();
+    
+    // Filter out known extension errors that don't affect functionality
+    if (errorString.includes('chrome-extension://') || 
+        errorString.includes('evmask.js')) {
+      return; // Silently ignore these errors
+    }
+    
+    originalConsoleError.apply(console, args);
+  };
+
+  extensionErrorListeners.push(() => {
+    console.error = originalConsoleError;
+  });
+  
+  // Add global error handler for unhandled extension errors
+  const handleError = (event: ErrorEvent) => {
     if (isExtensionError(event.error)) {
       event.preventDefault();
       logger.warn('Extension error filtered', sanitizeExtensionError(event.error));
     }
+  };
+  
+  window.addEventListener('error', handleError);
+  extensionErrorListeners.push(() => {
+    window.removeEventListener('error', handleError);
   });
-
-  window.addEventListener('unhandledrejection', (event) => {
+  
+  const handleRejection = (event: PromiseRejectionEvent) => {
     if (isExtensionError(event.reason)) {
       event.preventDefault();
       logger.warn('Extension promise rejection filtered', sanitizeExtensionError(event.reason));
     }
+  };
+
+  window.addEventListener('unhandledrejection', handleRejection);
+  extensionErrorListeners.push(() => {
+    window.removeEventListener('unhandledrejection', handleRejection);
   });
 };
+
+export const cleanupExtensionErrorHandling = () => {
+  let fn: (() => void) | undefined;
+  while ((fn = extensionErrorListeners.pop()) !== undefined) {
+    fn();
+  }
+};
diff --git a/src/utils/security/transactionSecurity.ts b/src/utils/security/transactionSecurity.ts
index b3f5c7f1..30d00b71 100644
--- a/src/utils/security/transactionSecurity.ts
+++ b/src/utils/security/transactionSecurity.ts
@@ -75,6 +75,7 @@ export function createTrustedDeviceId(): string {
   return `trusted_${crypto.randomUUID()}`;
 }
 
+const sessionDeviceId = typeof crypto !== 'undefined' ? crypto.randomUUID() : 'server-device';
 function simpleHash(input: string): string {
   let hash = 0;
   for (let i = 0; i < input.length; i++) {
@@ -103,15 +104,6 @@ export function getSecurityDeviceId(): string {
   return sessionDeviceId;
 }
 
-  const key = 'propchain-security-device-id-hash';
-  const existing = window.localStorage.getItem(key);
-  if (existing) return existing;
-
-  const deviceId = crypto.randomUUID();
-  const salt = getSessionSalt();
-  const hashedId = simpleHash(`${deviceId}:${salt}`);
-  window.localStorage.setItem(key, hashedId);
-  return deviceId;
 export async function hashDeviceId(deviceId: string): Promise<string> {
   const encoder = new TextEncoder();
   const data = encoder.encode(deviceId);