Feature: add global anti-duplicate game search

app.js

@@ -46,10 +46,13 @@ const backupBtn = document.getElementById("backupBtn");
 const restoreMergeBtn = document.getElementById("restoreMergeBtn");
 const restoreReplaceBtn = document.getElementById("restoreReplaceBtn");
 const restoreFileInput = document.getElementById("restoreFileInput");
+const quickSearchInput = document.getElementById("quickSearchInput");
+const quickSearchResults = document.getElementById("quickSearchResults");
 const gamesList = document.getElementById("gamesList");
 const gameCardTemplate = document.getElementById("gameCardTemplate");
 let editingGameId = null;
 let pendingRestoreMode = "merge";
+let quickSearchTerm = "";
 
 toolsToggleBtn.addEventListener("click", () => {
   toolsDrawer.classList.toggle("open");
@@ -78,6 +81,11 @@ document.addEventListener("keydown", (event) => {
   }
 });
 
+quickSearchInput.addEventListener("input", (event) => {
+  quickSearchTerm = event.target.value.trim();
+  renderSearchResults();
+});
+
 platformForm.addEventListener("submit", async (event) => {
   event.preventDefault();
 
@@ -430,6 +438,7 @@ function render() {
   renderBrandTabs();
   renderConsoleTabs();
   renderGames();
+  renderSearchResults();
 }
 
 function renderDataMode() {
@@ -482,6 +491,96 @@ function renderDataMode() {
   }
 }
 
+function findBrandByConsole(consoleName) {
+  for (const [brand, consoles] of Object.entries(state.brands)) {
+    if (Array.isArray(consoles) && consoles.includes(consoleName)) {
+      return brand;
+    }
+  }
+  return "INCONNUE";
+}
+
+function collectAllGames() {
+  const all = [];
+  for (const [consoleName, games] of Object.entries(state.gamesByConsole)) {
+    const brand = findBrandByConsole(consoleName);
+    for (const game of games || []) {
+      all.push({ ...game, consoleName, brand });
+    }
+  }
+  return all;
+}
+
+function renderSearchResults() {
+  if (!quickSearchResults) {
+    return;
+  }
+
+  const query = quickSearchTerm.trim().toLowerCase();
+  if (!query) {
+    quickSearchResults.innerHTML =
+      '<p class="empty">Saisis un titre pour verifier si tu possedes deja le jeu.</p>';
+    return;
+  }
+
+  const normalizedQuery = query.replace(/\s+/g, " ");
+  const allGames = collectAllGames();
+  const matches = allGames.filter((game) => {
+    const title = String(game.title || "").toLowerCase();
+    return title.includes(normalizedQuery);
+  });
+
+  const exactMatches = allGames.filter((game) => {
+    const title = String(game.title || "")
+      .toLowerCase()
+      .replace(/\s+/g, " ")
+      .trim();
+    return title === normalizedQuery;
+  });
+
+  if (!matches.length) {
+    quickSearchResults.innerHTML =
+      '<p class="search-status">Aucun jeu trouve dans ta collection.</p>';
+    return;
+  }
+
+  const maxShown = 20;
+  const shown = matches.slice(0, maxShown);
+  const header =
+    exactMatches.length > 0
+      ? `<p class="search-status">Deja possede: OUI (${exactMatches.length} correspondance${exactMatches.length > 1 ? "s" : ""} exacte${exactMatches.length > 1 ? "s" : ""}).</p>`
+      : `<p class="search-status">Jeu similaire trouve: ${matches.length} resultat${matches.length > 1 ? "s" : ""}.</p>`;
+
+  const items = shown
+    .map((game) => {
+      const meta = [
+        `${game.brand} / ${game.consoleName}`,
+        game.version ? `Version: ${game.version}` : null,
+        game.isDuplicate ? "Double: OUI" : null,
+      ]
+        .filter(Boolean)
+        .join(" | ");
+      return `<article class="search-hit"><strong>${escapeHtml(game.title || "")}</strong><p>${escapeHtml(meta)}</p></article>`;
+    })
+    .join("");
+
+  const more =
+    matches.length > maxShown
+      ? `<p class="empty">+${matches.length - maxShown} autre(s) resultat(s).</p>`
+      : "";
+
+  quickSearchResults.innerHTML = `${header}${items}${more}`;
+}
+
+function escapeHtml(text) {
+  return String(text)
+    .replaceAll("&", "&amp;")
+    .replaceAll("<", "&lt;")
+    .replaceAll(">", "&gt;")
+    .replaceAll('"', "&quot;")
+    .replaceAll("'", "&#39;");
+}
+
 function renderBrandTabs() {
   const brands = Object.keys(state.brands);
   brandTabs.innerHTML = "";