feat: redesign dashboard around place search

app/api/locations/search/route.ts

@@ -0,0 +1,46 @@
+import { NextResponse } from "next/server";
+
+const GEOCODING_URL = "https://geocoding-api.open-meteo.com/v1/search";
+
+interface RawLocation {
+  id?: number;
+  name?: string;
+  latitude?: number;
+  longitude?: number;
+  admin1?: string;
+  admin2?: string;
+}
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const query = searchParams.get("query")?.trim() ?? "";
+  const language = searchParams.get("language") === "en" ? "en" : "pl";
+  if (query.length < 2 || query.length > 80) return NextResponse.json([]);
+
+  const params = new URLSearchParams({
+    name: query,
+    count: "8",
+    language,
+    format: "json",
+    countryCode: "PL",
+  });
+  try {
+    const response = await fetch(`${GEOCODING_URL}?${params}`, { next: { revalidate: 86400 } });
+    if (!response.ok) return NextResponse.json({ error: "Location search is unavailable." }, { status: 502 });
+    const data = await response.json() as { results?: RawLocation[] };
+    const results = (data.results ?? []).flatMap((location) => {
+      if (!location.id || !location.name || !Number.isFinite(location.latitude) || !Number.isFinite(location.longitude)) return [];
+      return [{
+        id: location.id,
+        name: location.name,
+        latitude: location.latitude as number,
+        longitude: location.longitude as number,
+        province: location.admin1 ?? null,
+        district: location.admin2 ?? null,
+      }];
+    });
+    return NextResponse.json(results, { headers: { "Cache-Control": "public, s-maxage=86400, stale-while-revalidate=604800" } });
+  } catch {
+    return NextResponse.json({ error: "Location search is unavailable." }, { status: 502 });
+  }
+}