fix: use shared db instance in settingsService to resolve Prisma type errors

app/lib/settings.server.ts

@@ -1,8 +1,6 @@
 // app/lib/settings.server.ts
-import { PrismaClient } from '@prisma/client';
-import EventEmitter from 'events';
-
-const prisma = new PrismaClient();
+import { db } from "./db.server";
+import EventEmitter from "events";
 
 type JSONValue = any;
 
@@ -12,12 +10,11 @@ class SettingsService extends EventEmitter {
 
   async init() {
     if (this.initialized) return;
-    const rows = await prisma.appSetting.findMany();
-    rows.forEach(r => {
+    const rows = await db.appSetting.findMany();
+    rows.forEach((r) => {
       try {
         this.cache.set(r.key, JSON.parse(r.value));
       } catch (e) {
-        // fall back to raw string if parse fails
         this.cache.set(r.key, r.value);
       }
     });
@@ -31,20 +28,20 @@ class SettingsService extends EventEmitter {
 
   async set(key: string, value: JSONValue, updatedBy?: string) {
     if (!this.initialized) await this.init();
-    const valueStr = typeof value === 'string' ? value : JSON.stringify(value);
-    await prisma.appSetting.upsert({
+    const valueStr = typeof value === "string" ? value : JSON.stringify(value);
+    await db.appSetting.upsert({
       where: { key },
       update: { value: valueStr, updatedBy },
       create: { key, value: valueStr, updatedBy },
     });
     this.cache.set(key, value);
-    this.emit('update', { key, value });
+    this.emit("update", { key, value });
     return { key, value };
   }
 
   subscribe(fn: (payload: { key: string; value: any }) => void) {
-    this.on('update', fn);
-    return () => this.off('update', fn);
+    this.on("update", fn);
+    return () => this.off("update", fn);
   }
 }