Initial project setup for PhaseFlow

Set up Next.js 16 project with TypeScript for a training decision app
that integrates menstrual cycle phases with Garmin biometrics for
Hashimoto's thyroiditis management.

Stack: Next.js 16, React 19, Tailwind/shadcn, PocketBase, Drizzle,
Zod, Resend, Vitest, Biome, Lefthook, Nix dev environment.

Includes:
- 7 page routes (dashboard, login, settings, calendar, history, plan)
- 12 API endpoints (garmin, user, cycle, calendar, overrides, cron)
- Core lib utilities (decision engine, cycle phases, nutrition, ICS)
- Type definitions and component scaffolding
- Python script for Garmin token bootstrapping
- Initial unit tests for cycle utilities

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/pocketbase.ts

@@ -0,0 +1,10 @@
+// ABOUTME: PocketBase client initialization and utilities.
+// ABOUTME: Provides typed access to the PocketBase backend for auth and data.
+import PocketBase from "pocketbase";
+
+const POCKETBASE_URL = process.env.POCKETBASE_URL || "http://localhost:8090";
+
+export const pb = new PocketBase(POCKETBASE_URL);
+
+// Disable auto-cancellation for server-side usage
+pb.autoCancellation(false);