Add a test suite for the domain logic and the server routes.

The project had no automated verification at all, so the "Test" step in
the AGENTS.md workflow rested entirely on clicking through the app.

The suite runs on bun with node:assert and adds no dependency: every file
is a script that exits non-zero when a check fails, and test/run.ts runs
each one in its own process. Unit tests cover the rules that decide what
players see (badges, streaks, ball duty rotation, ratings, MVP ties,
scouting totals, goals, notifications, CSI parsing); integration and
end-to-end tests drive the real dev server. Nothing writes to the
database, so both can be pointed at a live environment.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

test/unit/pagelle.test.ts

@@ -0,0 +1,64 @@
+/** Check delle pagelle: `bun test/unit/pagelle.test.ts`. */
+import assert from "node:assert/strict";
+import {
+  mediaSquadra,
+  mediePagelle,
+  mieiVoti,
+  pagellePartita,
+  type VotoPagella,
+} from "@/lib/pagelle";
+
+const voto = (
+  match_id: string,
+  votante_id: string,
+  votato_id: string,
+  voto: number,
+): VotoPagella => ({
+  match_id,
+  votante_id,
+  votato_id,
+  voto,
+});
+
+const voti: VotoPagella[] = [
+  voto("m1", "g1", "g2", 8),
+  voto("m1", "g3", "g2", 7),
+  voto("m1", "g2", "g1", 6),
+  voto("m2", "g1", "g2", 6),
+];
+
+// --- mediePagelle ------------------------------------------------------------
+const medie = mediePagelle(voti);
+assert.deepEqual(medie["g2"], { media: 7, voti: 3 }, "media su tutte le partite");
+assert.deepEqual(medie["g1"], { media: 6, voti: 1 });
+assert.equal(medie["g99"], undefined, "chi non ha voti non compare");
+assert.deepEqual(mediePagelle([]), {}, "nessun voto: nessuna media");
+
+// Arrotondamento a un decimale, senza errori di virgola mobile.
+assert.equal(
+  mediePagelle([voto("m1", "g1", "gx", 7), voto("m1", "g2", "gx", 8)])["gx"]?.media,
+  7.5,
+);
+assert.equal(
+  mediePagelle([voto("m1", "g1", "gy", 7), voto("m1", "g2", "gy", 8), voto("m1", "g3", "gy", 8)])[
+    "gy"
+  ]?.media,
+  7.7,
+  "7.666… diventa 7.7",
+);
+
+// --- pagellePartita: isola la singola partita --------------------------------
+assert.deepEqual(pagellePartita(voti, "m1")["g2"], { media: 7.5, voti: 2 });
+assert.deepEqual(pagellePartita(voti, "m2")["g2"], { media: 6, voti: 1 });
+assert.deepEqual(pagellePartita(voti, "inesistente"), {});
+
+// --- mieiVoti: cosa ho già votato in questa partita --------------------------
+assert.deepEqual(mieiVoti(voti, "m1", "g1"), { g2: 8 });
+assert.deepEqual(mieiVoti(voti, "m1", "g2"), { g1: 6 });
+assert.deepEqual(mieiVoti(voti, "m1", "g99"), {}, "chi non ha votato non ha voti");
+
+// --- mediaSquadra ------------------------------------------------------------
+assert.equal(mediaSquadra(voti), 6.8, "(8+7+6+6)/4 = 6.75 → 6.8");
+assert.equal(mediaSquadra([]), 0, "nessun voto: media zero, non NaN");
+
+console.log("pagelle: ok");