feat: Souq native integration + auth simplification + CE-wide enhancements

Souq Marketplace:
- Native souq pages: browse+filters, create listing, detail+seller profile, orders+chat
- New API: reviews (POST), sellers/[id], upload (multipart), polar-checkout webhook
- Listings API enhanced: minPrice, maxPrice, sortBy, deliveryDays filters
- Seller workflow: start order, mark delivered, upload files, confirm delivery
- Wallet: 5 Polar.sh FLH tiers, production checkout, mock fallback, success banner
- Fix: order redirect /souq/history → /souq/orders

Auth System:
- Unified auth page, removed OAuth provider routing (2 files deleted)
- Deleted oauth.ts (319 lines) — simplified auth chain
- Streamlined login/register API routes

Prisma Schema (+179 lines):
- New models: Listing, Purchase, Review, Group/GroupMember
- Gamification: DailyStreak, XpTransaction, Achievement, UserLevel
- Learning: LearnCourse/Module/Enrollment/Certificate
- Notifications, Referrals, Dhikr, PremiumBenefits

Deleted legacy code:
- src/app/api/marketplace/* (3 files) — replaced by /api/souq/*
- src/app/api/files/[listingId]/route.ts — replaced by /api/souq/upload
- src/app/api/seller/[sellerId]/route.ts — replaced by /api/souq/sellers/[id]

Infrastructure:
- Dockerfile: standalone output, Prisma runtime migration
- docker-compose.yml: Polar env vars, healthcheck fix
- docker-compose.staging.yml: staging on port 4014
- .gitea/workflows/ci.yml: CI pipeline

public/manifest.json

@@ -0,0 +1,49 @@
+{
+  "name": "Falah — Islamic Lifestyle",
+  "short_name": "Falah",
+  "description": "Nur AI coaching, Halal marketplace, community & wallet",
+  "start_url": "/mobile",
+  "scope": "/mobile",
+  "display": "standalone",
+  "orientation": "portrait",
+  "background_color": "#0a0a0f",
+  "theme_color": "#0a0a0f",
+  "categories": ["lifestyle", "education", "finance"],
+  "lang": "en",
+  "dir": "ltr",
+  "id": "/mobile/",
+  "icons": [
+    { "src": "/mobile/icons/icon-48x48.png", "sizes": "48x48", "type": "image/png" },
+    { "src": "/mobile/icons/icon-72x72.png", "sizes": "72x72", "type": "image/png" },
+    { "src": "/mobile/icons/icon-96x96.png", "sizes": "96x96", "type": "image/png" },
+    { "src": "/mobile/icons/icon-128x128.png", "sizes": "128x128", "type": "image/png" },
+    { "src": "/mobile/icons/icon-144x144.png", "sizes": "144x144", "type": "image/png" },
+    { "src": "/mobile/icons/icon-152x152.png", "sizes": "152x152", "type": "image/png" },
+    { "src": "/mobile/icons/icon-192x192.png", "sizes": "192x192", "type": "image/png" },
+    { "src": "/mobile/icons/icon-384x384.png", "sizes": "384x384", "type": "image/png" },
+    { "src": "/mobile/icons/icon-512x512.png", "sizes": "512x512", "type": "image/png" },
+    { "src": "/mobile/icons/icon-192x192.png", "sizes": "192x192", "type": "image/png", "purpose": "maskable" },
+    { "src": "/mobile/icons/icon-512x512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable" }
+  ],
+  "screenshots": [],
+  "shortcuts": [
+    {
+      "name": "Nur AI Coach",
+      "short_name": "Nur AI",
+      "description": "Open AI coaching assistant",
+      "url": "/mobile/nur"
+    },
+    {
+      "name": "Halal Market",
+      "short_name": "Market",
+      "description": "Browse halal marketplace",
+      "url": "/mobile/market"
+    },
+    {
+      "name": "Wallet",
+      "short_name": "Wallet",
+      "description": "Falah wallet & payments",
+      "url": "/mobile/wallet"
+    }
+  ]
+}