feat: Add Web Push notifications and multiple UX improvements

- Add PWA manifest and service worker for push notifications
- Implement VAPID key generation and push subscription management
- Add push notification API endpoints (/api/push/*)
- Add push_subscriptions table to database schema
- Update notification settings UI with push support and iOS hints
- Fix translation issue showing "{ task } created" - add missing keys
- Fix mobile sidebar visibility for iOS home screen app
- Change default task filter from "all" to "open" (excludes done tasks)
- Add "Open" filter option to show only todo + inProgress tasks

server/index.ts

@@ -2,6 +2,7 @@ import express, { type Request, Response, NextFunction } from "express";
 import { registerRoutes } from "./routes.js";
 import { initializeDatabase, closeDatabase } from "./db.js";
 import { storage } from "./storage";
+import { initializeVapid } from "./push.js";
 
 const app = express();
 app.set("trust proxy", true);
@@ -79,6 +80,8 @@ app.use((req, res, next) => {
   if (process.env.NODE_ENV === 'production' || process.env.USE_DB === 'true') {
     try {
       await initializeDatabase();
+      // Initialize Web Push VAPID keys after database is ready
+      await initializeVapid();
     } catch (error) {
       console.error('Failed to initialize database:', error);
       process.exit(1);