feat: redesign homepage around search, recent history, and keyword suggestions

Replace the hollow upload-first landing with a tool shell that surfaces recent plays by default, YouTube Music keyword suggestions while typing, and shared result cards—while fixing deep-link watch URLs that were minimized by session restore.

Author: bgwastu

src/app/api/youtube/search/route.ts

@@ -24,7 +24,7 @@ function flattenToSearchResults(
 export async function GET(request: Request) {
   const { searchParams } = new URL(request.url);
   const query = searchParams.get("q")?.trim() ?? "";
-  const limit = Number(searchParams.get("limit") ?? 3);
+  const limit = Number(searchParams.get("limit") ?? 10);
 
   if (!query) {
     return Response.json({ results: [] });

src/app/api/youtube/suggest/route.ts

@@ -0,0 +1,28 @@
+import { searchErrorCode } from "@/lib/apiError";
+import { getSearchSuggestions } from "@/lib/youtubei";
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const query = searchParams.get("q")?.trim() ?? "";
+  const limit = Number(searchParams.get("limit") ?? 10);
+
+  if (!query) {
+    return Response.json({ suggestions: [] });
+  }
+
+  try {
+    const suggestions = await getSearchSuggestions(query, {
+      limit: Math.min(Math.max(limit || 10, 1), 20),
+    });
+    return Response.json({ suggestions });
+  } catch (error) {
+    const message =
+      error instanceof Error ? error.message : "Failed to load suggestions.";
+    console.error("[Moonlit] YouTube suggest error:", message);
+    const code = searchErrorCode(message);
+    return Response.json(
+      { error: message, suggestions: [], ...(code ? { code } : {}) },
+      { status: 500 },
+    );
+  }
+}