homepage: remove duplicate Topics chip row (kept only the always-visible labeled row)

src/app/home-page/components/ArticleFeed.tsx

@@ -505,27 +505,9 @@ export default function ArticleFeed() {
               </div>
             )}
 
-            {/* Category filter chips (always visible, quick access) */}
-            <div
-              className="flex flex-wrap gap-1.5"
-              role="group"
-              aria-label="Filter articles by category">
-              {ALL_CATEGORIES.map((cat, i) => {
-                const isActive = activeCategory === cat;
-                return (
-                  <button
-                    key={cat}
-                    ref={(el) => { filterRefs.current[i] = el; }}
-                    onClick={() => { setActiveCategory(cat); setPage(1); }}
-                    onKeyDown={(e) => handleFilterKeyDown(e, i)}
-                    aria-pressed={isActive}
-                    tabIndex={isActive ? 0 : -1}
-                    className={`filter-chip ${isActive ? "filter-chip-active" : ""} focus:outline-none focus-visible:ring-2 focus-visible:ring-[#3b82f6]`}>
-                    {cat}
-                  </button>
-                );
-              })}
-            </div>
+            {/* Legacy chip row removed — replaced by the always-visible
+                "Topics:" chip row higher up. Single source of category
+                selection now. */}
 
             {/* Results count */}
             {(searchQuery || activeCategory !== "All" || sourceFilter !== "All" || authorFilter !== "All" || dateFrom || dateTo) && (