fix: TypeScript build errors & CORS config

Frontend Fixes:
- command/auctions: Fix addDomainToWatchlist → addDomain, Set iteration
- command/dashboard: Add missing Bell icon import
- command/portfolio: Optional chaining for valuation_formula
- command/pricing: Wrap AlertTriangle in span for title prop
- command/watchlist: Fix Badge className, optional form event
- legal/privacy: Escape >> in JSX
- api.ts: Add optional valuation_formula to DomainValuation

Server:
- CORS: Added http://10.42.0.73:3000 to allowed origins
- Email verification enabled

frontend/src/app/command/auctions/page.tsx

@@ -202,8 +202,8 @@ export default function AuctionsPage() {
     
     setTrackingInProgress(domain)
     try {
-      await api.addDomainToWatchlist({ domain })
-      setTrackedDomains(prev => new Set([...prev, domain]))
+      await api.addDomain(domain)
+      setTrackedDomains(prev => new Set([...Array.from(prev), domain]))
     } catch (error) {
       console.error('Failed to track domain:', error)
     } finally {

frontend/src/app/command/dashboard/page.tsx

@@ -22,6 +22,7 @@ import {
   Activity,
   Loader2,
   Search,
+  Bell,
 } from 'lucide-react'
 import clsx from 'clsx'
 import Link from 'next/link'

frontend/src/app/command/portfolio/page.tsx

@@ -705,10 +705,12 @@ export default function PortfolioPage() {
                     {valuation.confidence}
                   </span>
                 </div>
-                <div className="p-3 bg-foreground/5 rounded-lg">
-                  <p className="text-foreground-muted mb-1">Valuation Formula</p>
-                  <p className="text-foreground font-mono text-xs break-all">{valuation.valuation_formula}</p>
-                </div>
+                {valuation.valuation_formula && (
+                  <div className="p-3 bg-foreground/5 rounded-lg">
+                    <p className="text-foreground-muted mb-1">Valuation Formula</p>
+                    <p className="text-foreground font-mono text-xs break-all">{valuation.valuation_formula}</p>
+                  </div>
+                )}
                 <div className="p-3 bg-amber-400/10 border border-amber-400/20 rounded-lg text-xs text-amber-400">
                   <p>This is an algorithmic estimate based on domain length, TLD, and market patterns. Actual market value may vary.</p>
                 </div>

frontend/src/app/command/pricing/[tld]/page.tsx

@@ -575,10 +575,9 @@ export default function CommandTldDetailPage() {
                             ${registrar.renewal_price.toFixed(2)}
                           </span>
                           {hasRenewalTrap && (
-                            <AlertTriangle 
-                              className="w-3.5 h-3.5 text-amber-400 cursor-help" 
-                              title={`Renewal trap: ${(registrar.renewal_price / registrar.registration_price).toFixed(1)}x registration price`}
-                            />
+                            <span title={`Renewal trap: ${(registrar.renewal_price / registrar.registration_price).toFixed(1)}x registration price`}>
+                              <AlertTriangle className="w-3.5 h-3.5 text-amber-400 cursor-help" />
+                            </span>
                           )}
                         </div>
                       </td>

frontend/src/app/command/watchlist/page.tsx

@@ -133,8 +133,8 @@ export default function WatchlistPage() {
   ], [stats])
 
   // Callbacks - prevent recreation on every render
-  const handleAddDomain = useCallback(async (e: React.FormEvent) => {
-    e.preventDefault()
+  const handleAddDomain = useCallback(async (e?: React.FormEvent) => {
+    e?.preventDefault()
     if (!newDomain.trim()) return
     
     setAdding(true)
@@ -227,7 +227,7 @@ export default function WatchlistPage() {
           <div>
             <span className="font-mono font-medium text-foreground">{domain.name}</span>
             {domain.is_available && (
-              <Badge variant="success" size="xs" className="ml-2">AVAILABLE</Badge>
+              <span className="ml-2"><Badge variant="success" size="xs">AVAILABLE</Badge></span>
             )}
           </div>
         </div>

frontend/src/app/legal/privacy/page.tsx

@@ -108,15 +108,15 @@ export default function PrivacyPage() {
                            </p>
                            <ul className="space-y-3 font-mono text-sm text-white/60">
                               <li className="flex items-start gap-3">
-                                 <span className="text-accent mt-1">>></span>
+                                 <span className="text-accent mt-1">{'>>'}</span>
                                  Provide millisecond-latency domain availability checks.
                               </li>
                               <li className="flex items-start gap-3">
-                                 <span className="text-accent mt-1">>></span>
+                                 <span className="text-accent mt-1">{'>>'}</span>
                                  Execute automated acquisition strategies (Sniper Mode).
                               </li>
                               <li className="flex items-start gap-3">
-                                 <span className="text-accent mt-1">>></span>
+                                 <span className="text-accent mt-1">{'>>'}</span>
                                  Process encrypted transactions via secure gateways.
                               </li>
                            </ul>

frontend/src/lib/api.ts

@@ -906,6 +906,7 @@ export interface DomainValuation {
   confidence: string
   source: string
   calculated_at: string
+  valuation_formula?: string
 }
 
 export interface PriceAlert {