feat(web): add favorites for sticker and GIF pickers

docs/core-checklist-status.md

@@ -25,8 +25,8 @@ Legend:
 16. Media & Attachments - `DONE` (upload/preview/download/gallery)
 17. Voice Messages - `PARTIAL` (record/send/play/seek/speed; UX still being polished)
 18. Circle Video Messages - `PARTIAL` (send/play present, recording UX basic)
-19. Stickers - `PARTIAL` (web sticker picker with preset pack)
-20. GIF - `PARTIAL` (web GIF picker with preset catalog + local search)
+19. Stickers - `PARTIAL` (web sticker picker with preset pack + favorites)
+20. GIF - `PARTIAL` (web GIF picker with preset catalog + local search + favorites)
 21. Message History/Search - `DONE` (history/pagination/chat+global search)
 22. Text Formatting - `PARTIAL` (bold/italic/underline/spoiler/mono/links supported; toolbar still evolving)
 23. Groups - `PARTIAL` (create/add/remove/invite link; advanced moderation partial)

web/src/components/MessageComposer.tsx

@@ -29,6 +29,29 @@ const GIF_PRESETS: Array<{ name: string; url: string }> = [
   { name: "Success", url: "https://media.giphy.com/media/4T7e4DmcrP9du/giphy.gif" },
 ];
 
+const STICKER_FAVORITES_KEY = "bm_sticker_favorites_v1";
+const GIF_FAVORITES_KEY = "bm_gif_favorites_v1";
+
+function loadFavorites(key: string): Set<string> {
+  try {
+    const raw = window.localStorage.getItem(key);
+    if (!raw) return new Set();
+    const parsed = JSON.parse(raw) as string[];
+    if (!Array.isArray(parsed)) return new Set();
+    return new Set(parsed.filter((item) => typeof item === "string"));
+  } catch {
+    return new Set();
+  }
+}
+
+function saveFavorites(key: string, values: Set<string>): void {
+  try {
+    window.localStorage.setItem(key, JSON.stringify([...values]));
+  } catch {
+    return;
+  }
+}
+
 export function MessageComposer() {
   const activeChatId = useChatStore((s) => s.activeChatId);
   const chats = useChatStore((s) => s.chats);
@@ -72,7 +95,11 @@ export function MessageComposer() {
   const [showFormatMenu, setShowFormatMenu] = useState(false);
   const [showStickerMenu, setShowStickerMenu] = useState(false);
   const [showGifMenu, setShowGifMenu] = useState(false);
+  const [stickerTab, setStickerTab] = useState<"all" | "favorites">("all");
+  const [gifTab, setGifTab] = useState<"all" | "favorites">("all");
   const [gifQuery, setGifQuery] = useState("");
+  const [favoriteStickers, setFavoriteStickers] = useState<Set<string>>(() => loadFavorites(STICKER_FAVORITES_KEY));
+  const [favoriteGifs, setFavoriteGifs] = useState<Set<string>>(() => loadFavorites(GIF_FAVORITES_KEY));
   const [captionDraft, setCaptionDraft] = useState("");
   const mediaInputRef = useRef<HTMLInputElement | null>(null);
   const fileInputRef = useRef<HTMLInputElement | null>(null);
@@ -259,6 +286,32 @@ export function MessageComposer() {
     }
   }
 
+  function toggleStickerFavorite(url: string) {
+    setFavoriteStickers((prev) => {
+      const next = new Set(prev);
+      if (next.has(url)) {
+        next.delete(url);
+      } else {
+        next.add(url);
+      }
+      saveFavorites(STICKER_FAVORITES_KEY, next);
+      return next;
+    });
+  }
+
+  function toggleGifFavorite(url: string) {
+    setFavoriteGifs((prev) => {
+      const next = new Set(prev);
+      if (next.has(url)) {
+        next.delete(url);
+      } else {
+        next.add(url);
+      }
+      saveFavorites(GIF_FAVORITES_KEY, next);
+      return next;
+    });
+  }
+
   function onComposerKeyDown(event: KeyboardEvent<HTMLTextAreaElement>) {
     if (event.key !== "Enter") {
       return;
@@ -795,20 +848,46 @@ export function MessageComposer() {
         <div className="mb-2 rounded-xl border border-slate-700/80 bg-slate-900/95 p-2">
           <div className="mb-2 flex items-center justify-between">
             <p className="text-xs font-semibold text-slate-200">Stickers</p>
-            <button className="rounded bg-slate-700 px-2 py-1 text-[11px]" onClick={() => setShowStickerMenu(false)} type="button">
-              Close
-            </button>
+            <div className="flex items-center gap-1">
+              <button
+                className={`rounded px-2 py-1 text-[11px] ${stickerTab === "all" ? "bg-sky-500 text-slate-950" : "bg-slate-700"}`}
+                onClick={() => setStickerTab("all")}
+                type="button"
+              >
+                All
+              </button>
+              <button
+                className={`rounded px-2 py-1 text-[11px] ${stickerTab === "favorites" ? "bg-sky-500 text-slate-950" : "bg-slate-700"}`}
+                onClick={() => setStickerTab("favorites")}
+                type="button"
+              >
+                Favorites
+              </button>
+              <button className="rounded bg-slate-700 px-2 py-1 text-[11px]" onClick={() => setShowStickerMenu(false)} type="button">
+                Close
+              </button>
+            </div>
           </div>
           <div className="grid grid-cols-4 gap-2 md:grid-cols-8">
-            {STICKER_PRESETS.map((sticker) => (
+            {STICKER_PRESETS.filter((item) => (stickerTab === "favorites" ? favoriteStickers.has(item.url) : true)).map((sticker) => (
               <button
-                className="rounded-lg bg-slate-800/80 p-2 hover:bg-slate-700"
+                className="relative rounded-lg bg-slate-800/80 p-2 hover:bg-slate-700"
                 key={sticker.url}
                 onClick={() => void sendPresetMedia(sticker.url)}
                 title={sticker.name}
                 type="button"
               >
                 <img alt={sticker.name} className="mx-auto h-9 w-9 object-contain" draggable={false} src={sticker.url} />
+                <span
+                  className="absolute right-1 top-1 text-[10px]"
+                  onClick={(event) => {
+                    event.preventDefault();
+                    event.stopPropagation();
+                    toggleStickerFavorite(sticker.url);
+                  }}
+                >
+                  {favoriteStickers.has(sticker.url) ? "★" : "☆"}
+                </span>
               </button>
             ))}
           </div>
@@ -829,16 +908,45 @@ export function MessageComposer() {
               Close
             </button>
           </div>
+          <div className="mb-2 flex items-center gap-1">
+            <button
+              className={`rounded px-2 py-1 text-[11px] ${gifTab === "all" ? "bg-sky-500 text-slate-950" : "bg-slate-700"}`}
+              onClick={() => setGifTab("all")}
+              type="button"
+            >
+              All
+            </button>
+            <button
+              className={`rounded px-2 py-1 text-[11px] ${gifTab === "favorites" ? "bg-sky-500 text-slate-950" : "bg-slate-700"}`}
+              onClick={() => setGifTab("favorites")}
+              type="button"
+            >
+              Favorites
+            </button>
+          </div>
           <div className="grid grid-cols-2 gap-2 md:grid-cols-4">
-            {GIF_PRESETS.filter((item) => item.name.toLowerCase().includes(gifQuery.trim().toLowerCase())).map((gif) => (
+            {GIF_PRESETS
+              .filter((item) => item.name.toLowerCase().includes(gifQuery.trim().toLowerCase()))
+              .filter((item) => (gifTab === "favorites" ? favoriteGifs.has(item.url) : true))
+              .map((gif) => (
               <button
-                className="overflow-hidden rounded-lg bg-slate-800/80 hover:bg-slate-700"
+                className="relative overflow-hidden rounded-lg bg-slate-800/80 hover:bg-slate-700"
                 key={gif.url}
                 onClick={() => void sendPresetMedia(gif.url)}
                 title={gif.name}
                 type="button"
               >
                 <img alt={gif.name} className="h-20 w-full object-cover md:h-24" draggable={false} src={gif.url} />
+                <span
+                  className="absolute right-1 top-1 rounded bg-black/45 px-1 text-[10px] text-white"
+                  onClick={(event) => {
+                    event.preventDefault();
+                    event.stopPropagation();
+                    toggleGifFavorite(gif.url);
+                  }}
+                >
+                  {favoriteGifs.has(gif.url) ? "★" : "☆"}
+                </span>
               </button>
             ))}
           </div>