fix: Correct portfolio import and TypeScript errors

- Fixed import: get_current_user from app.api.deps (not app.api.auth)
- Removed empty routes folder
- Fixed TldHistory interface (optional trend fields)
- Fixed DomainCheckResult interface (nullable fields)
- Fixed loadData function to compute values from available API data

backend/app/api/portfolio.py

@@ -7,7 +7,7 @@ from sqlalchemy import select, func, and_
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.database import get_db
-from app.api.auth import get_current_user
+from app.api.deps import get_current_user
 from app.models.user import User
 from app.models.portfolio import PortfolioDomain, DomainValuation
 from app.services.valuation import valuation_service

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

@@ -58,7 +58,8 @@ interface TldHistory {
   price_change_7d: number
   price_change_30d: number
   price_change_90d: number
-  trend: string
+  trend?: string
+  trend_reason?: string
   history: Array<{
     date: string
     price: number
@@ -69,9 +70,9 @@ interface DomainCheckResult {
   domain: string
   is_available: boolean
   status: string
-  registrar?: string
-  creation_date?: string
-  expiration_date?: string
+  registrar?: string | null
+  creation_date?: string | null
+  expiration_date?: string | null
 }
 
 // Registrar URLs with affiliate parameters
@@ -420,27 +421,41 @@ export default function TldDetailPage() {
       
       if (historyData && compareData) {
         const registrars = compareData.registrars || []
-        const priceRange = compareData.price_range || { min: 0, max: 0, avg: 0 }
+        const sortedRegistrars = [...registrars].sort((a, b) => 
+          a.registration_price - b.registration_price
+        )
+        const minPrice = sortedRegistrars[0]?.registration_price || historyData.current_price || 0
+        const maxPrice = sortedRegistrars[sortedRegistrars.length - 1]?.registration_price || historyData.current_price || 0
+        const avgPrice = registrars.length > 0
+          ? registrars.reduce((sum, r) => sum + r.registration_price, 0) / registrars.length
+          : historyData.current_price || 0
+        
+        // Determine trend from price change
+        const trend = historyData.price_change_30d > 5 ? 'up' 
+                    : historyData.price_change_30d < -5 ? 'down' 
+                    : 'stable'
         
         setDetails({
           tld: compareData.tld || tld,
-          type: compareData.type || 'generic',
-          description: compareData.description || `Domain extension .${tld}`,
-          registry: compareData.registry || 'Unknown',
-          introduced: compareData.introduced || 0,
-          trend: historyData.trend || 'stable',
-          trend_reason: historyData.trend_reason || 'Price tracking available',
+          type: 'generic',
+          description: `Domain extension .${tld}`,
+          registry: 'Various',
+          introduced: 0,
+          trend: trend,
+          trend_reason: trend === 'up' ? 'Price increase' : trend === 'down' ? 'Price decrease' : 'Stable pricing',
           pricing: {
-            avg: priceRange.avg || historyData.current_price || 0,
-            min: priceRange.min || historyData.current_price || 0,
-            max: priceRange.max || historyData.current_price || 0,
+            avg: avgPrice,
+            min: minPrice,
+            max: maxPrice,
           },
-          registrars: registrars.sort((a: { registration_price: number }, b: { registration_price: number }) => 
-            a.registration_price - b.registration_price
-          ),
-          cheapest_registrar: compareData.cheapest_registrar || registrars[0]?.name || 'N/A',
+          registrars: sortedRegistrars,
+          cheapest_registrar: sortedRegistrars[0]?.name || 'N/A',
+        })
+        setHistory({
+          ...historyData,
+          trend: trend,
+          trend_reason: trend === 'up' ? 'Price increase' : trend === 'down' ? 'Price decrease' : 'Stable pricing',
         })
-        setHistory(historyData)
       } else {
         setError('Failed to load TLD data')
       }