# SALAH — prayer times for Casablanca (Xiaomi Watch S4)

Offline prayer-time companion: shows today's six times (FAJR, SHURUK, DHUHR,
ASR, MAGHRIB, ISHA) with the next prayer highlighted and a countdown banner.

**Status: VERIFIED MATH (matches AlAdhan on 3 reference dates); on-watch render
pending user confirmation.**

## Method

Morocco (Ministry of Habous), matching AlAdhan `method=21`:

- Fajr 19°, Isha 17° (twilight angles)
- Standard Asr (shadow factor 1× — Maliki default in Morocco)
- Dhuhr = solar noon + 5 min; Maghrib = sunset + 5 min (AlAdhan's baked offsets)
- Location hardcoded: Casablanca 33.5731, −7.5898 · fixed TZ = UTC+1.
  Ramadan clock changes are not handled by this version.

All computation happens **on the watch** — no GPS, no network. Pure solar math
(same Meeus approach as the sundial) lives in `src/common/prayer.js`.

## Screen (v0.5)

- Pure #000000 AMOLED background, large 50px clock, no swipe hint
- Prayer names above their times, in fixed 104px native list rows
- After scrolling stops, the nearest-center prayer gets a 60px time and 28px
  label; other rows use 30px times and 20px labels
- No font resizing or row-array replacement during gesture/inertial scrolling
- Duplicate stop notifications do not repaint unchanged focus; periodic refresh
  defers while scrolling and resumes normally after hiding/showing the app
- Scroll viewport 320×264 at x73/y101 (center y233); 80px end spacers
- Fixed countdown below the list; lavender next-prayer highlight
- Normal system back exits; calculation logic unchanged

User reported watch lag in v0.4. A 500-event VM replay measured 500 row-array
replacements in v0.4 versus zero during scrolling in v0.5. This verifies reduced
update work, NOT device frame rate. All automated tests and release build pass;
on-watch smoothness still needs confirmation. `preview-0.4.png` remains an
illustrative static layout mock; the settled appearance is unchanged.

## Project layout

```text
src/
├── app.ux, manifest.json   # com.ilias.salah, watch, designWidth 466
├── common/
│   ├── prayer.js           # times/format/nextPrayer/formatCountdown — pure, unit-tested
│   └── icon.png            # 192×192 circular icon (user-supplied mosque art)
└── pages/index/index.ux    # layout + update loop
tests/
├── prayer.cjs              # 10 tests vs AlAdhan reference times (3 dates)
├── page.cjs                # 11 wiring/layout tests (incl. chord-fit assertions)
├── make_icon.py            # icon conversion pipeline (disc detect → round mask → 192²)
└── check-rpk.py            # verifies icon/manifest inside the built .rpk
```

## Build & test

```bash
npm ci
npm run release
node tests/prayer.cjs
node tests/page.cjs
node tests/amoled.cjs
node tests/focus.cjs
node tests/scroll-performance.cjs
```

## Install

Side-load `dist/com.ilias.salah.release.*.rpk` via AstroBox.
Releases: https://gitea.oimcloud.myaddr.tools/codex-bot/vela-salah

## Accuracy note

Verified against AlAdhan API (method 21) for 2026-09-09, 2026-01-15, 2026-07-01 —
all six times within 2 minutes on every date. Tolerance covers the low-precision
solar vector (±0.01°) plus rounding.