feat: initial BudgetWise budgeting app with Appwrite sync

Full-stack PWA budgeting app installable on Android via Chrome.

Features implemented:
- Monthly balance sheet: income sources (monthly/yearly), buffer (fixed $ or % of income)
- Buckets: regular, savings-goal, and investment types with custom goals
  (amount or % of income, monthly or yearly schedule)
- Debt tracker: manual or auto-EMI (amortization formula), interest rate,
  remaining balance tracking, avalanche-method repayment suggestions
- Loan calculator: max affordable principal and EMI checker based on
  remaining income after all expenses
- Investment projections: compound interest at monthly/yearly rate,
  1/5/10-year projections per bucket
- Deposit / withdraw transactions per bucket with balance history
- Appwrite self-hosted backend: auth, 5 collections (balance_sheets,
  incomes, buckets, debts, transactions)
- scripts/setup-appwrite.cjs: one-command DB setup via node-appwrite
- PWA manifest + service worker (vite-plugin-pwa) for Android install
- Dark mobile-first UI with TailwindCSS, Zustand state, React Router v6

https://claude.ai/code/session_01Ny2EMaZYvzk5SSVDAPgxpP

vite.config.ts

@@ -0,0 +1,58 @@
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+import { VitePWA } from 'vite-plugin-pwa';
+
+export default defineConfig({
+  plugins: [
+    react(),
+    VitePWA({
+      registerType: 'autoUpdate',
+      includeAssets: ['icon.svg', 'favicon.ico'],
+      manifest: {
+        name: 'BudgetWise',
+        short_name: 'BudgetWise',
+        description: 'Personal budgeting app with Appwrite sync',
+        theme_color: '#0f172a',
+        background_color: '#0f172a',
+        display: 'standalone',
+        orientation: 'portrait',
+        start_url: '/',
+        id: '/',
+        icons: [
+          {
+            src: '/icon.svg',
+            sizes: 'any',
+            type: 'image/svg+xml',
+            purpose: 'any',
+          },
+          {
+            src: '/icon-192.png',
+            sizes: '192x192',
+            type: 'image/png',
+            purpose: 'any maskable',
+          },
+          {
+            src: '/icon-512.png',
+            sizes: '512x512',
+            type: 'image/png',
+            purpose: 'any maskable',
+          },
+        ],
+      },
+      workbox: {
+        globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2}'],
+        runtimeCaching: [
+          {
+            urlPattern: ({ url }) => url.href.includes('/v1/'),
+            handler: 'NetworkFirst',
+            options: {
+              cacheName: 'appwrite-api',
+              networkTimeoutSeconds: 10,
+              cacheableResponse: { statuses: [0, 200] },
+            },
+          },
+        ],
+      },
+    }),
+  ],
+});