feat: expanded smart folder category coverage (Gaming, RideSharing, FoodDelivery, SeasonalSales, Wellness, Shopping)

- Added 6 new EmailCategory enum values
- HeuristicClassifier rewritten with domain and subject-keyword rules:
  - RideSharing: Uber, Lyft, Bolt, Free Now, Grab etc.
  - FoodDelivery: DoorDash, Uber Eats, Deliveroo, Just Eat, Grubhub etc.
  - Gaming: Steam, Epic, EA, Xbox, PlayStation, Nintendo, Blizzard, Riot etc.
  - Shopping: Amazon, eBay, Etsy, ASOS, Zalando, Shein etc.
  - SeasonalSales: subject keywords (sale, % off, promo, black friday etc.)
  - Wellness: Strava, Garmin, Peloton, MyFitnessPal, Headspace, Nike etc. + subject hints
  - Priority ordering prevents ride-share/food receipts misclassifying as Finance
- SidebarCounts maps all new slugs to their EmailCategory
- frontend folderToRequest() and CAT_SLUG map all new categories
- Existing emails will pick up new categories on next sync

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/api/client.js

@@ -92,8 +92,13 @@ function folderToRequest(slug, page, pageSize) {
     case 'automated':   return { ...base, category: 'Notification' };
     case 'finance':     return { ...base, category: 'Finance' };
     case 'social':      return { ...base, category: 'Social' };
-    case 'shopping':    return { ...base, category: 'Promotional' };
+    case 'shopping':    return { ...base, category: 'Shopping' };
     case 'noreply':     return { ...base, query: 'from:noreply' };
+    case 'gaming':      return { ...base, category: 'Gaming' };
+    case 'sales':       return { ...base, category: 'SeasonalSales' };
+    case 'ridesharing': return { ...base, category: 'RideSharing' };
+    case 'food':        return { ...base, category: 'FoodDelivery' };
+    case 'wellness':    return { ...base, category: 'Wellness' };
     default:            return { ...base };
   }
 }

frontend/src/components/widgets.jsx

@@ -109,6 +109,12 @@ const CAT_SLUG = {
   Social:       '/app/folder/social',
   Notification: '/app/folder/automated',
   Promotional:  '/app/folder/shopping',
+  Shopping:     '/app/folder/shopping',
+  Gaming:       '/app/folder/gaming',
+  RideSharing:  '/app/folder/ridesharing',
+  FoodDelivery: '/app/folder/food',
+  SeasonalSales:'/app/folder/sales',
+  Wellness:     '/app/folder/wellness',
   Spam:         '/app/folder/spam',
   Newsletter:   '/app/search?q=newsletter',
   Personal:     '/app/search?q=is:unread',

src/InboxIntel.Domain/Enums/Enums.cs

@@ -10,7 +10,13 @@ public enum EmailCategory
     Spam = 4,
     Promotional = 5,
     Social = 6,
-    Notification = 7
+    Notification = 7,
+    Gaming = 8,
+    RideSharing = 9,
+    FoodDelivery = 10,
+    SeasonalSales = 11,
+    Wellness = 12,
+    Shopping = 13
 }
 
 /// <summary>State machine for a sync run.</summary>

src/InboxIntel.Infrastructure/Analytics/AnalyticsService.cs

@@ -167,16 +167,16 @@ public class AnalyticsService : IAnalyticsService
 
         var smartFolders = new Dictionary<string, int>
         {
-            ["automated"] = Cat(EmailCategory.Notification),
+            ["automated"]   = Cat(EmailCategory.Notification),
-            ["finance"]   = Cat(EmailCategory.Finance),
+            ["finance"]     = Cat(EmailCategory.Finance),
-            ["social"]    = Cat(EmailCategory.Social),
+            ["social"]      = Cat(EmailCategory.Social),
-            ["shopping"]  = Cat(EmailCategory.Promotional),
+            ["shopping"]    = Cat(EmailCategory.Shopping) + Cat(EmailCategory.Promotional),
-            ["noreply"]   = 0,
+            ["noreply"]     = Cat(EmailCategory.Notification),
-            ["gaming"]    = 0,
+            ["gaming"]      = Cat(EmailCategory.Gaming),
-            ["sales"]     = 0,
+            ["sales"]       = Cat(EmailCategory.SeasonalSales),
-            ["ridesharing"] = 0,
+            ["ridesharing"] = Cat(EmailCategory.RideSharing),
-            ["food"]      = 0,
+            ["food"]        = Cat(EmailCategory.FoodDelivery),
-            ["wellness"]  = 0,
+            ["wellness"]    = Cat(EmailCategory.Wellness),
         };
 
         return new SidebarCountsDto(inbox, allMail, unread, starred, sent, drafts, trash, spam, large, old, smartFolders);

src/InboxIntel.Infrastructure/Sync/HeuristicClassifier.cs

@@ -7,22 +7,64 @@ namespace InboxIntel.Infrastructure.Sync;
 /// Fast, dependency-free first-pass classifier applied during sync. The AI
 /// layer can later refine these labels, but this guarantees every email has a
 /// sensible category even when AI is disabled.
+///
+/// Priority order matters: more specific categories are checked first so a
+/// food-delivery receipt doesn't fall through to Finance or Newsletter.
 /// </summary>
 public static class HeuristicClassifier
 {
-    private static readonly string[] FinanceHints = { "invoice", "receipt", "payment", "statement", "bank", "transaction", "billing" };
+    // ── Domain hint lists ────────────────────────────────────────────────────
-    private static readonly string[] SocialHints = { "facebook", "twitter", "linkedin", "instagram", "tiktok" };
+    private static readonly string[] RideSharingDomains  = { "uber.com", "lyft.com", "bolt.eu", "freenow.com", "cabify.com", "grab.com", "gojek.com" };
-    private static readonly string[] NoReplyHints = { "noreply", "no-reply", "donotreply", "newsletter", "mailer", "notifications" };
+    private static readonly string[] FoodDeliveryDomains = { "doordash.com", "ubereats.com", "justeat.com", "deliveroo.com", "grubhub.com", "seamless.com", "postmates.com", "foodpanda.com", "swiggy.com", "zomato.com" };
+    private static readonly string[] GamingDomains       = { "steampowered.com", "epicgames.com", "ea.com", "xbox.com", "playstation.com", "nintendo.com", "blizzard.com", "riotgames.com", "ubisoft.com", "gog.com", "humblebundle.com", "bethesda.net" };
+    private static readonly string[] ShoppingDomains     = { "amazon.com", "amazon.co.uk", "ebay.com", "ebay.co.uk", "etsy.com", "aliexpress.com", "asos.com", "shein.com", "zalando.com", "walmart.com", "target.com", "shopify.com" };
+    private static readonly string[] WellnessDomains     = { "strava.com", "garmin.com", "peloton.com", "myfitnesspal.com", "headspace.com", "calm.com", "nike.com", "adidas.com", "whoop.com", "fitbit.com", "zwift.com" };
+    private static readonly string[] SocialDomains       = { "facebook", "twitter", "linkedin", "instagram", "tiktok", "snapchat", "pinterest", "reddit", "discord", "slack", "teams" };
+    private static readonly string[] FinanceDomains      = { "paypal.com", "stripe.com", "wise.com", "revolut.com", "monzo.com", "starling.com", "barclays.co.uk", "hsbc.co.uk", "lloydsbank.com", "natwest.com", "chase.com", "americanexpress.com" };
+
+    // ── Subject keyword lists ────────────────────────────────────────────────
+    private static readonly string[] FinanceSubjectHints   = { "invoice", "receipt", "payment", "statement", "bank", "transaction", "billing", "refund", "order confirmation", "your order", "subscription renewal" };
+    private static readonly string[] SeasonalSalesHints    = { "sale", "% off", "discount", "deal", "offer", "promo", "coupon", "black friday", "cyber monday", "flash sale", "clearance", "limited time" };
+    private static readonly string[] WellnessSubjectHints  = { "workout", "run summary", "activity", "steps", "calories", "meditation", "streak", "fitness", "training plan", "race result" };
+    private static readonly string[] NoReplyFromHints      = { "noreply", "no-reply", "donotreply", "notifications", "mailer", "automated" };
 
     public static EmailCategory Classify(GmailMessageDetail d)
     {
         var subject = (d.Subject ?? string.Empty).ToLowerInvariant();
-        var from = d.FromAddress.ToLowerInvariant();
+        var from    = d.FromAddress.ToLowerInvariant();
 
+        // Ride-sharing — check before finance so a trip receipt doesn't become Finance
+        if (RideSharingDomains.Any(h => from.Contains(h))) return EmailCategory.RideSharing;
+
+        // Food delivery — same reason
+        if (FoodDeliveryDomains.Any(h => from.Contains(h))) return EmailCategory.FoodDelivery;
+
+        // Gaming
+        if (GamingDomains.Any(h => from.Contains(h))) return EmailCategory.Gaming;
+
+        // Wellness
+        if (WellnessDomains.Any(h => from.Contains(h)) || WellnessSubjectHints.Any(h => subject.Contains(h)))
+            return EmailCategory.Wellness;
+
+        // Shopping / e-commerce domains
+        if (ShoppingDomains.Any(h => from.Contains(h))) return EmailCategory.Shopping;
+
+        // Seasonal sales (subject-driven — catches cross-retailer promotions)
+        if (SeasonalSalesHints.Any(h => subject.Contains(h))) return EmailCategory.SeasonalSales;
+
+        // Finance — domain first, then subject keywords
+        if (FinanceDomains.Any(h => from.Contains(h)) || FinanceSubjectHints.Any(h => subject.Contains(h)))
+            return EmailCategory.Finance;
+
+        // Social networks
+        if (SocialDomains.Any(h => from.Contains(h))) return EmailCategory.Social;
+
+        // Newsletters (has unsubscribe header but didn't match any specific domain above)
         if (d.HasListUnsubscribe) return EmailCategory.Newsletter;
-        if (FinanceHints.Any(h => subject.Contains(h))) return EmailCategory.Finance;
+
-        if (SocialHints.Any(h => from.Contains(h))) return EmailCategory.Social;
+        // Automated / notification senders
-        if (NoReplyHints.Any(h => from.Contains(h))) return EmailCategory.Notification;
+        if (NoReplyFromHints.Any(h => from.Contains(h))) return EmailCategory.Notification;
+
         return EmailCategory.Personal;
     }
 }