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

src/app/api/forum/posts/route.ts

@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
 import { requireAuth } from "@/lib/auth";
 import { getUserTier, FORUM_LIMITS } from "@/lib/tiers";
+import { moderateContent } from "@/lib/shariah-moderation";
 
 export async function GET(request: NextRequest) {
   try {
@@ -104,6 +105,22 @@ export async function POST(request: NextRequest) {
       },
     });
 
+    // ── Auto-moderation for post content ──────────────────────────────
+    const result = moderateContent(content);
+    if (result.status === "approved") {
+      await prisma.forumPost.update({
+        where: { id: post.id },
+        data: { shariahStatus: "approved" },
+      });
+      post.shariahStatus = "approved";
+    } else {
+      await prisma.forumPost.update({
+        where: { id: post.id },
+        data: { shariahFlags: JSON.stringify(result.flags) },
+      });
+      post.shariahFlags = JSON.stringify(result.flags);
+    }
+
     return NextResponse.json({ post }, { status: 201 });
   } catch (error) {
     console.error("POST /api/forum/posts error:", error);