feat: AI-powered login page with daily greeting and animated blob background

- Add public /api/greeting endpoint that generates a daily AI greeting (cached per day)
- Replace static hero text with dynamic AI greeting (ChatGPT/Claude style)
- Add Stripe-style animated gradient blobs with 14 daily-rotating color palettes
- Use Plus Jakarta Sans font and Sparkles icon for modern AI look
- Update subtitle to "Driven by multiple AI agents"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/Backend/src/app.ts

@@ -5,6 +5,7 @@ import { errorHandler } from "./middlewares/error.middleware";
 import { apiLogger } from "./middlewares/logger.middleware";
 import authRoutes from "./routes/auth";
 import twilioWebhookRoutes from "./routes/twilio-webhooks";
+import greetingRoutes from "./routes/greeting";
 import { authenticateJWT } from "./middlewares/auth.middleware";
 import dotenv from "dotenv";
 import { startBackupCron } from "./cron/backupCheck";
@@ -73,6 +74,7 @@ app.use(
 app.use("/uploads", express.static(path.join(process.cwd(), "uploads")));
 
 app.use("/api/auth", authRoutes);
+app.use("/api/greeting", greetingRoutes);
 // Twilio webhooks are public — Twilio sends no JWT token
 app.use("/api/twilio", express.urlencoded({ extended: false }), twilioWebhookRoutes);
 // All other API routes require JWT