fix: functionalize guardian layer with image upload and enhanced local heuristics

backend/app/services/live_intel_service.py

@@ -234,6 +234,18 @@ class LiveIntelService:
                 if isinstance(result, list):
                     evidence.extend(result)
 
+        # Local Heuristic Evidence (Works without API keys)
+        for domain in domains:
+            tld = "." + domain.split(".")[-1]
+            if tld in [".top", ".xyz", ".buzz", ".live", ".work"]:
+                evidence.append({
+                    "source": "Janus Infrastructure Scan",
+                    "signal": "risky_tld",
+                    "value": tld,
+                    "severity": "medium",
+                    "explanation": f"Domain uses a risky TLD ({tld}) frequently used in phishing."
+                })
+        
         # Deduplicate similar evidence entries
         seen = set()
         cleaned: List[dict] = []

backend/app/services/risk_service.py

@@ -18,8 +18,15 @@ class RiskService:
         risk_score += intent.impersonation * 40
         risk_score += intent.payment * 30
         
-        if intent.urgency > 0.8: reasons.append("Aggressive urgency detected")
-        if intent.impersonation > 0.8: reasons.append("Possible high-authority impersonation")
+        if intent.urgency > 0.6: 
+            risk_score += 20
+            reasons.append("Aggressive urgency detected (Psychological Trigger)")
+        if intent.impersonation > 0.6: 
+            risk_score += 25
+            reasons.append("Possible high-authority impersonation detected")
+        if intent.fear > 0.6:
+            risk_score += 20
+            reasons.append("Fear-based manipulation detected (Coercive Trigger)")
 
         # 2. Entity Rules (Depth: Cross-Entity Matching)
         if entities.upi_ids and entities.domains:
@@ -53,9 +60,20 @@ class RiskService:
             risk_score += (dissonance * 40)
             reasons.append("Emotional Dissonance: Content conflicts with emotional tone")
 
-        # 5. Optimization: Market Factual Dissonance
-        # If brands contains a ticker (mock check)
+        # 5. Optimization: Market & Brand Factual Dissonance
         for brand in entities.brands:
+            # Brand-Domain Mismatch (ZeroTrust Core)
+            if entities.domains:
+                brand_lower = brand.lower()
+                for domain in entities.domains:
+                    domain_lower = domain.lower()
+                    # If brand mentioned but domain doesn't match official brand domain
+                    # Very simple check for now
+                    if brand_lower in ["sbi", "hdfc", "icici", "axis", "paytm", "amazon", "flipkart"]:
+                        if brand_lower not in domain_lower:
+                            risk_score += 40
+                            reasons.append(f"Brand Mismatch: Claimed brand '{brand}' does not match link destination '{domain}'")
+
             status = market_watcher.get_watchlist_status()
             match = next((s for s in status if s["symbol"] == brand.upper()), None)
             if match and match["price"]:

frontend/src/components/ScamGuardian.tsx

@@ -1,8 +1,8 @@
 'use client';
 
-import { useState, useEffect } from 'react';
+import { useState, useEffect, useRef } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
-import { ShieldAlert, Link, Image as ImageIcon, Search, AlertTriangle, CheckCircle, XCircle, Info, Hash, ExternalLink, Brain, Sparkles } from 'lucide-react';
+import { ShieldAlert, Link, Image as ImageIcon, Search, AlertTriangle, CheckCircle, XCircle, Info, Hash, ExternalLink, Brain, Sparkles, Upload } from 'lucide-react';
 import { apiClient, guardianClient } from '@/lib/api';
 import type { ScamGuardianResponse } from '@/lib/types';
 import LiveEvidencePanel from './guardian/LiveEvidencePanel';
@@ -17,6 +17,9 @@ export default function ScamGuardian() {
   const [guardianStatus, setGuardianStatus] = useState<any>(null);
   const [isSubmittingFeedback, setIsSubmittingFeedback] = useState(false);
   const [feedbackSubmitted, setFeedbackSubmitted] = useState<string | null>(null);
+  const [selectedFile, setSelectedFile] = useState<File | null>(null);
+  const [previewUrl, setPreviewUrl] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
   const liveEvents = useGuardianFeed();
 
   // Load history and status on mount
@@ -35,7 +38,7 @@ export default function ScamGuardian() {
   };
 
   const handleAnalyze = async () => {
-    if (!inputValue.trim() && activeTab !== 'image') return;
+    if (!inputValue.trim() && !selectedFile) return;
     setIsAnalyzing(true);
     setFeedbackSubmitted(null);
     try {
@@ -43,6 +46,11 @@ export default function ScamGuardian() {
       if (activeTab === 'text') payload.text = inputValue;
       if (activeTab === 'url') payload.url = inputValue;
       
+      if (activeTab === 'image' && selectedFile) {
+        const base64 = await fileToBase64(selectedFile);
+        payload.image_base64 = base64;
+      }
+      
       const res = await guardianClient.analyze(payload);
       setResult(res as unknown as ScamGuardianResponse);
       fetchHistory(); // Refresh history
@@ -53,6 +61,23 @@ export default function ScamGuardian() {
     }
   };
 
+  const fileToBase64 = (file: File): Promise<string> => {
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.readAsDataURL(file);
+      reader.onload = () => resolve(reader.result as string);
+      reader.onerror = (error) => reject(error);
+    });
+  };
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0];
+    if (file) {
+      setSelectedFile(file);
+      setPreviewUrl(URL.createObjectURL(file));
+    }
+  };
+
   const handleFeedback = async (isScam: boolean) => {
     if (!result) return;
     setIsSubmittingFeedback(true);
@@ -156,10 +181,35 @@ export default function ScamGuardian() {
                 />
               )}
               {activeTab === 'image' && (
-                <div className="h-32 border-2 border-dashed border-white/[0.06] rounded-2xl flex flex-col items-center justify-center text-gray-700 group hover:border-indigo-500/30 transition-all cursor-pointer">
-                   <ImageIcon size={24} className="mb-2 group-hover:text-indigo-500 transition-colors" />
-                   <span className="text-[10px] uppercase tracking-widest font-black">Upload Forensic Screenshot</span>
-                   <span className="text-[9px] mt-1 opacity-40">MMSA Emotional Dissonance engine will process.</span>
+                <div 
+                  onClick={() => fileInputRef.current?.click()}
+                  className={`h-32 border-2 border-dashed rounded-2xl flex flex-col items-center justify-center transition-all cursor-pointer relative overflow-hidden group ${
+                    previewUrl ? 'border-indigo-500/50 bg-indigo-500/5' : 'border-white/[0.06] text-gray-700 hover:border-indigo-500/30'
+                  }`}
+                >
+                   <input 
+                     type="file" 
+                     ref={fileInputRef}
+                     onChange={handleFileChange}
+                     accept="image/*"
+                     className="hidden"
+                   />
+                   {previewUrl ? (
+                     <>
+                       <img src={previewUrl} alt="Preview" className="absolute inset-0 w-full h-full object-cover opacity-20" />
+                       <div className="relative z-10 flex flex-col items-center">
+                         <Upload size={20} className="mb-1 text-indigo-400" />
+                         <span className="text-[10px] uppercase font-black text-indigo-400">Change Image</span>
+                         <span className="text-[9px] text-gray-500 mt-0.5">{selectedFile?.name}</span>
+                       </div>
+                     </>
+                   ) : (
+                     <>
+                       <ImageIcon size={24} className="mb-2 group-hover:text-indigo-500 transition-colors" />
+                       <span className="text-[10px] uppercase tracking-widest font-black">Upload Forensic Screenshot</span>
+                       <span className="text-[9px] mt-1 opacity-40">MMSA Emotional Dissonance engine will process.</span>
+                     </>
+                   )}
                 </div>
               )}