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client: standalone /stats page with charts, off the admin dashboard

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Closes #40.

New /stats route (client/stats.html + src/stats/), served by the same
catch-all pattern as /admin. Reuses the admin login (STATS_PUBLIC env var
on the server side decides whether it needs one at all).

Three uPlot charts (daily revenue, daily transaction count, top-5-drink
sold-qty trend) plus the same three tables Admin.tsx used to render inline
— those move here wholesale, Admin.tsx now just links to /stats instead of
fetching /admin/api/stats itself. The 'Statistik zurücksetzen' reset button
moves here too, gated on an actual admin session (checked separately from
whether /api/stats itself succeeded, since STATS_PUBLIC can make that true
for an anonymous viewer).

Chart lib is uPlot (~45kb) per mara's steer not to hand-roll this. Both
client and server build/typecheck clean; manually smoke-tested the auth
gate (401 unauthed, 200 after login) and the /stats route against a fresh
DB.
This commit is contained in:
iris 2026-07-30 10:25:54 +02:00 • committed by mara
commit 1d99881e88
10 changed files with 332 additions and 75 deletions
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client/stats.html Normal file
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<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>wutzcalc — Statistik</title>
<link rel="icon" type="image/svg+xml" href="/favicon.svg" />
<script>
// Set the theme before first paint to avoid a flash of the wrong colors.
document.documentElement.setAttribute(
'data-theme',
localStorage.getItem('wutz.theme') === 'light' ? 'light' : 'dark'
);
</script>
<link rel="stylesheet" href="/src/styles.css" />
</head>
<body>
<div id="app"></div>
<script type="module" src="/src/stats/main.tsx"></script>
</body>
</html>