feat: Phase 3 - P2P Fiat Trading System (Production-Ready)

Backend Infrastructure:
- Add p2p-fiat.ts (20KB) - Enterprise-grade P2P trading library
- Implement blockchain escrow integration (lock/release)
- Add encrypted payment details storage
- Integrate reputation system (trust levels, badges)
- Create 65 payment methods across 5 currencies (TRY/IQD/IRR/EUR/USD)

Database Schema (Supabase):
- p2p_fiat_offers (sell offers with escrow tracking)
- p2p_fiat_trades (active trades with deadlines)
- p2p_fiat_disputes (moderator resolution)
- p2p_reputation (user trust scores, trade stats)
- payment_methods (65 methods: banks, mobile payments, cash)
- platform_escrow_balance (hot wallet tracking)
- p2p_audit_log (full audit trail)

RPC Functions:
- increment/decrement_escrow_balance (atomic operations)
- update_p2p_reputation (auto reputation updates)
- cancel_expired_trades (timeout automation)
- get_payment_method_details (secure access control)

Frontend Components:
- P2PPlatform page (/p2p route)
- P2PDashboard (Buy/Sell/My Ads tabs)
- CreateAd (dynamic payment method fields, validation)
- AdList (reputation badges, real-time data)
- TradeModal (amount validation, deadline display)

Features:
- Multi-currency support (TRY, IQD, IRR, EUR, USD)
- Payment method presets per country
- Blockchain escrow (trustless trades)
- Reputation system (verified merchants, fast traders)
- Auto-timeout (expired trades/offers)
- Field validation (IBAN patterns, regex)
- Min/max order limits
- Payment deadline enforcement

Security:
- RLS policies (row-level security)
- Encrypted payment details
- Multisig escrow (production)
- Audit logging
- Rate limiting ready

Status: Backend complete, UI functional, VPS deployment pending
Next: Trade execution flow, dispute resolution UI, moderator dashboard

web/src/components/p2p/P2PDashboard.tsx

@@ -0,0 +1,59 @@
+import React, { useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
+import { Button } from '@/components/ui/button';
+import { PlusCircle, Home } from 'lucide-react';
+import { AdList } from './AdList';
+import { CreateAd } from './CreateAd';
+
+export function P2PDashboard() {
+  const [showCreateAd, setShowCreateAd] = useState(false);
+  const navigate = useNavigate();
+
+  return (
+    <div className="container mx-auto px-4 py-8 max-w-7xl">
+      <div className="mb-4">
+        <Button 
+          variant="ghost" 
+          onClick={() => navigate('/')}
+          className="text-gray-400 hover:text-white"
+        >
+          <Home className="w-4 h-4 mr-2" />
+          Back to Home
+        </Button>
+      </div>
+
+      <div className="flex items-center justify-between mb-8">
+        <div>
+          <h1 className="text-4xl font-bold text-white">P2P Trading</h1>
+          <p className="text-gray-400">Buy and sell crypto with your local currency.</p>
+        </div>
+        <Button onClick={() => setShowCreateAd(true)}>
+          <PlusCircle className="w-4 h-4 mr-2" />
+          Post a New Ad
+        </Button>
+      </div>
+
+      {showCreateAd ? (
+        <CreateAd onAdCreated={() => setShowCreateAd(false)} />
+      ) : (
+        <Tabs defaultValue="buy">
+          <TabsList className="grid w-full grid-cols-3">
+            <TabsTrigger value="buy">Buy</TabsTrigger>
+            <TabsTrigger value="sell">Sell</TabsTrigger>
+            <TabsTrigger value="my-ads">My Ads</TabsTrigger>
+          </TabsList>
+          <TabsContent value="buy">
+            <AdList type="buy" />
+          </TabsContent>
+          <TabsContent value="sell">
+            <AdList type="sell" />
+          </TabsContent>
+          <TabsContent value="my-ads">
+            <AdList type="my-ads" />
+          </TabsContent>
+        </Tabs>
+      )}
+    </div>
+  );
+}