Lift Log

iPhone web app (PWA) for the 3-day full-body program (Day A / B / C from Improved_3Day_Workout_Program_1.xlsx).

• Log weight + reps per set, pre-filled from last time, with double-progression suggestions
• Rest timer that starts when you tick a set; lock-screen alert via Web Push
• Program notes and form cues on every exercise, per-exercise and per-workout notes, pinned notes
• Week number from the program start date; history by workout and a week-by-week grid
• Progress: top weight, estimated 1RM, volume per exercise, weekly volume, consistency calendar
• Edit the program: sets, reps, rest, weight jump, swaps from the spreadsheet's swap table
• Works offline; syncs to Supabase (Google sign-in) when online

Layout

Path	What
docs/	The app (static, no build step). Served by GitHub Pages from /docs.
docs/config.js	Public config: Supabase URL + anon key, push Worker URL, VAPID public key.
supabase/schema.sql	Tables + row level security. Run once in the Supabase SQL editor.
worker/	Cloudflare Worker + Durable Object that sends the rest-over push at the right second.

Setup

1. Supabase: create a free project, run supabase/schema.sql in the SQL editor, copy the project URL and anon key into docs/config.js and worker/wrangler.toml.
2. Google sign-in: in Google Cloud Console create an OAuth client (Web application) with redirect URI https://<project-ref>.supabase.co/auth/v1/callback. In Supabase → Authentication → Sign In / Providers → Google, paste the client ID and secret. In Authentication → URL Configuration set Site URL to the app URL and add it (plus http://localhost:5178) to Redirect URLs.
3. Push Worker: cd worker && node gen-vapid.mjs (once; the public key goes in docs/config.js and wrangler.toml), then npx wrangler login, npx wrangler deploy, npx wrangler secret put VAPID_PRIVATE_JWK < .vapid-private.json. Put the Worker URL in docs/config.js → pushUrl.
4. Hosting: push to GitHub, Settings → Pages → Deploy from branch main, folder /docs.
5. iPhone: open the site in Safari → Share → Add to Home Screen. Open it from the Home Screen, sign in, then Settings → Lock-screen alerts → Enable.

Bump VERSION in docs/sw.js on each deploy so phones pick up the new files.

Tests

cd worker && npm i --no-save http_ece && node test/webpush.test.mjs checks the push payload encryption against the reference implementation and verifies the VAPID signature.