db: Appwrite schema (isletmem db, 11 tables, indexes) + SDK helpers

- Created database 'isletmem' with 11 tables via Appwrite MCP:
  tenant_settings, customers, services, software, customer_software,
  calendar_events, tasks, finance_entries, invoices, invoice_items, audit_logs
- All tables use rowSecurity=true; row-level perms scoped to Appwrite Team (tenant)
- 18 indexes (composite on tenantId + queried columns; unique for invoice numbers, tenant_settings)
- src/lib/appwrite/schema.ts as TS source of truth (DATABASE_ID, TABLES, row types)
- src/lib/appwrite/client.ts (browser SDK)
- src/lib/appwrite/server.ts (node-appwrite admin + session clients)
- .env.example template, .env.local for dev (gitignored)
- typecheck script added

package.json

@@ -6,7 +6,8 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
@@ -37,6 +38,7 @@
     "@radix-ui/react-tooltip": "^1.2.8",
     "@tailwindcss/postcss": "^4.1.18",
     "@tanstack/react-table": "^8.21.3",
+    "appwrite": "^25.0.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
@@ -44,6 +46,7 @@
     "lucide-react": "^0.562.0",
     "next": "16.1.1",
     "next-themes": "^0.4.6",
+    "node-appwrite": "^24.0.0",
     "postcss": "^8.5.6",
     "react": "19.2.3",
     "react-day-picker": "^9.13.0",