feat: let the list ignore, submit and undo events from Nextcloud

Each row now shows its shared status and carries the matching gesture. Nothing
is displayed before Nextcloud confirms it: on failure the status stays put and
the reason is spelled out. Ignored events are greyed and pushed to the end,
never hidden.

presentation.test.ts

@@ -4,6 +4,8 @@ import {
   LIEU_PAR_DEFAUT,
   formaterDate,
   formaterLieu,
+  formaterStatut,
+  repousserIgnores,
   trierParDebut,
 } from "./extension/presentation.js";
 
@@ -213,3 +215,44 @@ describe("formaterLieu", () => {
     expect(formaterLieu(evenement({ lieu: "   " }))).toBe(LIEU_PAR_DEFAUT);
   });
 });
+
+describe("formaterStatut", () => {
+  test("soumis avec date → « Soumis le JJ/MM »", () => {
+    expect(formaterStatut({ type: "soumis", jour: "2026-08-13" })).toBe("Soumis le 13/08");
+  });
+
+  test("soumis sans date exploitable → « Soumis »", () => {
+    expect(formaterStatut({ type: "soumis", jour: null })).toBe("Soumis");
+  });
+
+  test("ignoré → « Ignoré » ; aucun → rien à afficher", () => {
+    expect(formaterStatut({ type: "ignoré" })).toBe("Ignoré");
+    expect(formaterStatut({ type: "aucun" })).toBe("");
+  });
+});
+
+describe("repousserIgnores", () => {
+  test("les ignorés passent en fin, l'ordre relatif est conservé", () => {
+    const evenements = [
+      evenement({ uid: "a" }),
+      evenement({ uid: "ignore-1", categories: ["mairie:ignoré"] }),
+      evenement({ uid: "b", categories: ["Concert"] }),
+      evenement({ uid: "ignore-2", categories: ["Concert", "mairie:ignoré"] }),
+      evenement({ uid: "c", categories: ["mairie:soumis:2026-08-13"] }),
+    ];
+
+    expect(repousserIgnores(evenements).map((e) => e.uid)).toEqual([
+      "a",
+      "b",
+      "c",
+      "ignore-1",
+      "ignore-2",
+    ]);
+  });
+
+  test("liste sans ignoré → inchangée, sans mutation de l'entrée", () => {
+    const evenements = [evenement({ uid: "a" }), evenement({ uid: "b" })];
+    expect(repousserIgnores(evenements).map((e) => e.uid)).toEqual(["a", "b"]);
+    expect(evenements.map((e) => e.uid)).toEqual(["a", "b"]);
+  });
+});