feat: Implement user feedback-based prediction adjustment

backend/models/SenderReputation.js

@@ -0,0 +1,30 @@
+const mongoose = require('mongoose');
+
+const SenderReputationSchema = new mongoose.Schema({
+  email: { type: String, required: true, index: true },
+  domain: { type: String, required: true, index: true },
+  score: { type: Number, default: 50, min: 0, max: 100 },
+  spamReports: { type: Number, default: 0 },
+  hamReports: { type: Number, default: 0 },
+  lastSeen: { type: Date, default: Date.now }
+});
+
+SenderReputationSchema.methods.recordHam = function() {
+  this.hamReports += 1;
+  this.score = Math.min(100, this.score + 2);
+  return this.save();
+};
+
+SenderReputationSchema.methods.recordSpam = function() {
+  this.spamReports += 1;
+  this.score = Math.max(0, this.score - 5);
+  return this.save();
+};
+
+SenderReputationSchema.methods.getLevel = function() {
+  if (this.score >= 70) return 'trusted';
+  if (this.score >= 40) return 'neutral';
+  return 'suspicious';
+};
+
+module.exports = mongoose.model('SenderReputation', SenderReputationSchema);

backend/models/UserFeedback.js

@@ -0,0 +1,13 @@
+const mongoose = require('mongoose');
+
+const UserFeedbackSchema = new mongoose.Schema({
+  userId: { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true },
+  text: { type: String, required: true },
+  predicted_label: { type: String, required: true },
+  correct_label: { type: String, required: true },
+  sender: { type: String },
+  confidence: { type: Number, default: 0 },
+  created_at: { type: Date, default: Date.now }
+});
+
+module.exports = mongoose.model('UserFeedback', UserFeedbackSchema);

frontend/src/components/EmailScannerDashboard.jsx

@@ -41,7 +41,7 @@
     checkConnectionStatus();
     handleOAuthCallback();
     refreshImapStatus();
   }, []);
 
 const checkConnectionStatus = async () => {
   try {
@@ -118,6 +118,29 @@
     }
   };
 
+ const handleFeedback = async (email, correctLabel) => {
+  try {
+    const token = localStorage.getItem('token');
+    await axios.post('/api/feedback', {
+      text: email.body,
+      predicted_label: email.prediction,
+      correct_label: correctLabel,
+      sender: email.sender,
+      confidence: email.confidence
+    }, {
+      headers: { Authorization: `Bearer ${token}` }
+    });
+
+    setEmails(prev => prev.map(e => 
+      e.id === email.id ? { ...e, feedbackGiven: true } : e
+    ));
+
+    toast.success('Thank you for your feedback!');
+  } catch (error) {
+    toast.error('Failed to save feedback');
+  }
+};
+
   const handleScan = async (provider) => {
     if (!provider) return;
     setScanning(true);
@@ -361,6 +384,22 @@
             )}
           </div>
         </div>
+        <div className="email-actions">
+          {!email.feedbackGiven && (
+          <>
+          <button onClick={() => handleFeedback(email, 'ham')}>
+          ✅ Mark as Safe
+          </button>
+          <button onClick={() => handleFeedback(email, 'spam')}>
+        🚫 Mark as Spam
+        </button>
+        </>
+       )}
+    {email.feedbackGiven && (
+    <span className="feedback-thanks">✅ Thanks for your feedback!</span>
+    )}
+    </div>
+
         {/* IMAP Card */}
         <div className={`p-5 rounded-2xl border transition-all duration-300 ${
           isDark ? "bg-slate-900/40 border-slate-800" : "bg-white/45 border-slate-200"