fix: Scout tier restrictions - no listings, no sniper alerts

Frontend:
- Scout: Listings and Sniper marked as unavailable
- Updated comparison table

Backend TIER_CONFIG:
- Scout: domain_limit=5, portfolio_limit=5, listing_limit=0, sniper_limit=0
- Trader: domain_limit=50, portfolio_limit=50

backend/app/models/subscription.py

@@ -37,12 +37,12 @@ TIER_CONFIG = {
         "name": "Scout",
         "price": 0,
         "currency": "USD",
-        "domain_limit": 10,           # Watchlist: 10 (was 5)
-        "portfolio_limit": 3,         # Portfolio: 3 (was 0) - taste the feature
-        "listing_limit": 1,           # Listings: 1 (was 0) - try selling
-        "sniper_limit": 2,            # Sniper alerts
+        "domain_limit": 5,            # Watchlist: 5
+        "portfolio_limit": 5,         # Portfolio: 5
+        "listing_limit": 0,           # Listings: 0 (Trader+ only)
+        "sniper_limit": 0,            # Sniper alerts: 0 (Trader+ only)
         "check_frequency": "daily",
-        "history_days": 7,            # 7 days history (was 0)
+        "history_days": 7,
         "features": {
             "email_alerts": True,
             "sms_alerts": False,
@@ -63,10 +63,10 @@ TIER_CONFIG = {
         "name": "Trader",
         "price": 9,
         "currency": "USD",
-        "domain_limit": 100,          # Watchlist: 100 (was 50)
-        "portfolio_limit": 50,        # Portfolio: 50 (was 25)
-        "listing_limit": 10,          # Listings: 10 (was 5)
-        "sniper_limit": 10,           # Sniper alerts
+        "domain_limit": 50,           # Watchlist: 50
+        "portfolio_limit": 50,        # Portfolio: 50
+        "listing_limit": 10,          # Listings: 10
+        "sniper_limit": 10,           # Sniper alerts: 10
         "check_frequency": "hourly",
         "history_days": 90,
         "features": {
@@ -81,7 +81,7 @@ TIER_CONFIG = {
             "webhooks": False,
             "bulk_tools": False,
             "seo_metrics": False,
-            # Yield (DNS routing + landing) is Tycoon-only. Trader can preview ideas in VISION.
+            # Yield Preview only - can see landing page but not activate routing
             "yield": False,
             "daily_drop_digest": False,
         }

frontend/src/app/pricing/page.tsx

@@ -23,8 +23,8 @@ const tiers = [
       { text: 'Alert Speed', highlight: false, available: true, sublabel: 'Daily' },
       { text: '5 Watchlist Domains', highlight: false, available: true },
       { text: '5 Portfolio Domains', highlight: false, available: true },
-      { text: '1 Listing', highlight: false, available: true, sublabel: 'Try it' },
-      { text: '2 Sniper Alerts', highlight: false, available: true },
+      { text: 'Listings', highlight: false, available: false },
+      { text: 'Sniper Alerts', highlight: false, available: false },
       { text: 'Pounce Score', highlight: false, available: true, sublabel: 'Basic' },
       { text: 'TLD Intel', highlight: false, available: true, sublabel: 'Public' },
     ],
@@ -86,8 +86,8 @@ const comparisonFeatures = [
   { name: 'Alert Speed', scout: 'Daily', trader: 'Hourly', tycoon: 'Every 5 min' },
   { name: 'Watchlist', scout: '5 Domains', trader: '50 Domains', tycoon: 'Unlimited' },
   { name: 'Portfolio', scout: '5 Domains', trader: '50 Domains', tycoon: 'Unlimited' },
-  { name: 'Listings', scout: '1 (Try it)', trader: '10 (0% Fee)', tycoon: 'Unlimited + Featured' },
-  { name: 'Sniper Alerts', scout: '2', trader: '10', tycoon: '50' },
+  { name: 'Listings', scout: '—', trader: '10 (0% Fee)', tycoon: 'Unlimited + Featured' },
+  { name: 'Sniper Alerts', scout: '—', trader: '10', tycoon: '50' },
   { name: 'Valuation', scout: 'Basic Score', trader: 'Pounce Score', tycoon: 'Score + SEO' },
   { name: 'TLD Intel', scout: 'Public', trader: 'Renewal Prices', tycoon: 'Full History' },
   { name: 'Yield', scout: '—', trader: 'Preview', tycoon: 'Active Routing' },

frontend/src/app/terminal/listing/page.tsx

@@ -75,8 +75,8 @@ export default function MyListingsPage() {
   const [menuOpen, setMenuOpen] = useState(false)
   
   const tier = subscription?.tier || 'scout'
-  const listingLimits: Record<string, number> = { scout: 1, trader: 10, tycoon: Infinity }
-  const maxListings = listingLimits[tier] || 1
+  const listingLimits: Record<string, number> = { scout: 0, trader: 10, tycoon: Infinity }
+  const maxListings = listingLimits[tier] || 0
   const canAddMore = listings.length < maxListings
   const isTycoon = tier === 'tycoon'
   const isUnlimited = tier === 'tycoon'

frontend/src/app/terminal/sniper/page.tsx

@@ -82,8 +82,8 @@ export default function SniperAlertsPage() {
   const [menuOpen, setMenuOpen] = useState(false)
 
   const tier = subscription?.tier || 'scout'
-  const alertLimits: Record<string, number> = { scout: 2, trader: 10, tycoon: 50 }
-  const maxAlerts = alertLimits[tier] || 2
+  const alertLimits: Record<string, number> = { scout: 0, trader: 10, tycoon: 50 }
+  const maxAlerts = alertLimits[tier] || 0
   // Limits match backend TIER_CONFIG.sniper_limit
   const canAddMore = alerts.length < maxAlerts